ferrocare.comferrocare.com/pdf/Nachi-Fujikoshi.pdf · Using the NACHI Standard Hydraulic Equipment...

2004

2004

ISO 9001TOYAMA HEAD OFFICEThis catalog is printed on recycled paper.

Standardhydraulicequipment

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Using the NACHI Standard Hydraulic Equipment Catalog

As a comprehensive manufacturer of a full range of hydraulic equipment, Nachi-Fujikoshimanufactures, markets, and provides a wide range of other services for a full lineup ofoutstanding products. This general catalog introduces standard hydraulic equipment that has been carefully selectedfrom the wide range of products manufactured by Nachi-Fujikoshi. We hope that this catalog will be of assistance in planning your hydraulic system and forproviding some guidelines for your inquiries about Nachi-Fujikoshi products.

■ Interpreting Model Numbers Model numbers are assigned in accordance with Nachi-Fujikoshi standards as described below.

■ Using the Model Number IndexThe Model Number Index at the back this catalog lists the model numbers for NACHI standardhydraulic equipment. Use the index when looking up equipment details.

(Note)Design numbers are always two digits. A change in the right digit of the design number indicates there is no component compatibility. However, installation method compatibility still exists. This is subject to change without notice.

* × indicates a discontinued products, while indicates a product that is scheduled for production.

I

Preliminary/Contents.q 03.11.20 0:32 PM Page I

II

Hydraulic Equipment and Device Safety Precautions

■ Before using any Nachi-Fujikoshi hydraulic equipment or device, carefully read the precautions and the "Handling" section for each ofthe of the standard hydraulic equipment products.

■ Precautions are classified according to the three types described below. All three indicate important information that you need to knowto ensure safety. Be sure to read all precautions and carefully follow the advice that they provide.

*Danger, Warning, and Caution precautions are not comprehensive. Other risks may exist, even though they are not specificallymentioned. Before actually using any Nachi-Fujikoshi product, be sure to read its user documentation. You should use the product ordevice only after you thoroughly understand its user documentation, always keeping safety first and foremost in your mind.

*Be sure that you always comply with the following laws in order to ensure safe operation of a product.• High Pressure Gas Safety Law• Occupational Safety and Health Law• Fire Codes

■ Hydraulic Operating Fluid Precautions¡Use of improper hydraulic operating fluid creates the risk of malfunction and breakdown.

■ Precautions when Preparing for a Test Run

1. Checking the Product Model Number

DangerThis type of precaution indicates a condition in which incorrect handling creates the immediate risk of death orserious personal injury.

WarningThis type of precaution indicates a condition in which incorrect handling creates the risk of death or serious personalinjury.

CautionThis type of precaution indicates a condition in which incorrect handling creates the risk of personal injury ormaterial damage.

DangerMany hydraulic operating fluids are flammable, so do not use open flame and do not perform welding in the vicinityof hydraulic devices and equipment. Failure to follow this precaution creates the risk of fire.

Caution

Use only anti-wear type hydraulic operating fluid that is ISO3448 viscosity grade VG32 to VG68. Never use any other type of hydraulic operating fluid or fluid that is contaminated with foreign matter. Always check your user documentation for information before using non-mineral type hydraulic operating fluid(water based, synthetic, etc.)

CautionUse the proper type of hydraulic operating fluid, ensuring that fluid temperature, viscosity, contaminant level, andother factors are all within their prescribed ranges. Using hydraulic operating fluid outside of its prescribed rangescreates the risk of fire due to operational problems, mechanical damage, and fluid leaks.

Caution

Configure circuits and operate the system to ensure that the contamination level of the hydraulic operating fluid being used isalways within the manufacturer's recommended values. Check the contamination level and the condition of the filter at regularintervals. Also periodically check hydraulic operating fluid for oxidation, deterioration, and moisture, and replace the hydraulicoperating fluid whenever these levels exceed the recommended values of the fluid manufacturer.

CautionWhenever changing to another type of hydraulic operating fluid, be sure to thoroughly flush out the interior of thecircuit. Never mix hydraulic operating fluids of different types. Continued use creates the risk of malfunction of anddamage to the equipment.

CautionMake sure to avoid splashing hydraulic operating fluid on you and others. Should fluid get on your skin, wash thearea thoroughly with soap and water. Allowing hydraulic operating fluid to remain on the skin creates the risk of skinirritation.

CautionBefore replacing the hydraulic operating fluid, allow the fluid in the system to cool sufficiently. Hot fluid creates therisk of burn injury.

CautionAllowing the hydraulic operating fluid level in the tank to become too low creates the risk of malfunction andbreakdown.

Warning Always leave product installation, removal, piping, wiring, and other work up to specialists.

Warning Never attempt any unauthorized modification of the hydraulic system or control circuit.

Warning Never attempt any unauthorized modification of the setting values of the pressure and flow rate adjusting devices.

CautionAlways check new hydraulic devices for looseness of internal components that may have occurred during shipmentand check to make sure that all components are fitted securely.

CautionWhenever suspending a product, make sure that you use all of the attached eye plates or eye bolts. Using any othermethod (such a using a single eye plate) to suspend the product creates the risk of it falling.

DangerIn any atmosphere where there is the danger of explosion or fire, be sure to use only products that are designed foroperation in such atmospheres.

CautionWhenever installing a valve, pump, or motor, check its plate and engravings to confirm that it is the proper type. In many cases, youcannot tell the difference between different hydraulic equipment types by their outward appearance only.

Preliminary/Contents.q 03.11.20 0:32 PM Page II

III

2. Product Handling

3. External Piping

4. Electrical

5. Coupling Alignment

6. Valve, Pump, and Motor Installation

7. High-pressure Restrictions

8. Using an Accumulator

9. Fluid Supply

■ Precautions During a Test Run

Caution

• Be sure to perform sufficient flushing.• Anchor pipe supports to a secure surface. • Use pipe that has sufficient pressure rating. The rated pressure of the pipe should be double the pressure that you plan to

be using. • The finish of the O-ring seal surface should be within the equivalent of 6.3S. Make sure there are no cracks, etc.

WarningLeave all electrical work up to a qualified professional. Be sure to turn off power before performing electrical work.Failure to do so creates the risk of electric shock.

WarningFailure to check the condition of the gate valve and relief valve when checking the rotation direction of a hydraulicpump creates the risk of accident, malfunction, and breakdown.

CautionThough motor and pump shaft alignment is checked at the factory prior to shipment, they may go out of alignmentduring shipping or due to installation conditions. Because of this, you should always check for proper alignmentduring the test run.

CautionMake sure installation holes and surfaces are clean. Insufficient bolt tightening torque can allow fluid to leak,creating the risk of fire.

CautionWhenever installing a product, always use bolts of the specified strength and specified number, and tighten them tothe specified torque. Failure to observer proper specified values during installation creates the risk of fire due tomalfunction, mechanical damage, and hydraulic fluid leaks.

CautionDuring installation and removal, never strike the pump shaft or motor shaft with a hammer or otherwise subject themto impact. Doing so can damage the product.

Caution

In the case of a pump or motor that requires a drain pipe, the drain pipe that is used should not allow the pressureinside the casing to exceed the specified value. In the case of a pump or motor structure where operating fluidneeds to be filled within the casing during operation, use a drain pipe that constantly replenishes operating fluid butdoes not allow air to collect inside of the casing. The drain pipe also should not let the level of operating fluid insideof the case to drop (does not allow fluid to return to the tank) during long periods of non-operation.

WarningWhen using a pump that does not have a pressure compensation function (with maximum pressure adjustment), be sure toinstall a hydraulic circuit maximum pressure regulating relief valve near the pump discharge side.

WarningWhen using an accumulator, use only nitrogen gas. Be sure to read and understand all pertinent userdocumentation before using an accumulator.

Warning Never attempt to modify an accumulator by mechanical processing or welding.

CautionSupply fluid up to the standard quantity through the prescribed oil supply port. Take care to ensure that no foreignmatter or moisture contaminates the fluid. Also, check to make sure that the standard oil quantity is maintained evenwhen the actuator is operated.

WarningAuthorized personnel only should be allowed in the vicinity of hydraulic devices during operation. Never touchdevices during operation.

Warning Never remove covers of rotating parts or operate hydraulic devices with covers open.

Warning Before turning on the power supply, first check to make sure that all operation switches are off.

Caution Start up a pump while it is in the no-load state, and check to make sure that the rotation direction is correct.

Caution Valves, pumps, and motor casings can become very hot during operation. Do not touch them.

Caution

Should you ever notice abnormal noise, abnormal heat, abnormal vibration, leaking oil, smoke, abnormal odor, or anyother abnormal operation in a valve, pump, or motor, immediately shut down operation and take the necessary steps tocorrect the condition. Installation of sensors designed to detect abnormalities is recommended. Continued use under theabove conditions creates the risk of damage, fire, and personal injury.

CautionNever climb onto, strike, tip over, or apply excessive force to a product. Doing so creates the risk of malfunction,damage, fluid leaks, etc.

CautionWipe up any hydraulic operating fluid that gets on the product or floor. Failure to do so creates the risk of personalinjury due to the product slipping out of your hand and falling, and due to someone slipping on the fluid left on thefloor.

Preliminary/Contents.q 03.11.20 0:32 PM Page III

IV

1. Hydraulic Pump Operation

2. Priming (Air Bleeding)

3. Actuator Operation

4. Cleaning the Filter

5. Valve Control

■ Maintenance Precautions During Normal Daily Operation

1. Operating Fluid

2. Hydraulic Pumps

WarningOperate the actuator manually at low speed for initial operation. While carefully observing the operation of themachinery, perform continuous operation and automatic operation. Trying to perform continuous operation andautomatic operation for the initial operation creates the risk of unexpected accident and breakdown.

Warning Use valves within their prescribed maximum operating pressures (including surge pressure).

WarningSudden operation of the handle (screw) is dangerous. Be sure to unload the valve before gradually increasing pressure. Never keep a valve at a pressure that is greater than its design specification pressure value.

Warning

Make sure you understand the hydraulic circuit diagram and switching valve structure, and check the electricaloperation circuit and solenoid valve before performing any operation. • An incorrect switching direction can cause reverse operation of the actuator and create the risk of unexpected

accident and breakdown.

Warning

Make sure you understand the hydraulic circuit diagram and flow control valve structure before performing anyoperation. • Sudden operation can change the operating speed of the actuator and create the risk of unexpected accident or

breakdown.

CautionThe filter can become clogged right from the first test run. Be sure to watch the filter indicator for signs of clogging.Continued use of a clogged filter creates the risk of unexpected accident and breakdown.

WarningSet the pressure to a value that does not operate the actuator (normally 0.5 to 1.5MPa). Perform operation carefullywhile monitoring the pressure with a pressure gauge.

WarningWhen bleeding air while the actuator is being operated, be careful about the movement of the machinery. Shut downthe machinery immediately whenever there is the danger of accident.

CautionPerforming work while operating fluid is below the prescribed level or using a mixture of different types of operatingfluid creates the risk of malfunction or breakdown of the pump or other devices.

All Valves

Warning Use valves within their prescribed maximum operating pressures (including surge pressure).

Warning Never charge both coils of a double solenoid valve at the same time.

Caution The pump casing and solenoid coil surface can become very hot. Never touch them.

Caution Be sure to use the appropriate model in environments that require water resistance.

Solenoid Valves, Proportional Valves, Servo Valves

CautionIn order to ensure proper performance of hydraulic devices, check the fluid temperature, fluid level, and fluid color(for discoloration and deterioration) everyday. Any abnormalities create the risk of malfunction and breakdown.

CautionWhitish fluid indicates that water has contaminated the fluid, and blackish fluid indicates that the fluid has beensubjected to high temperatures. Replace the operating fluid whenever these symptoms are noticed.

CautionOperating fluid that is below the prescribed level can cause improper pump suction. Keep fluid filled to prescribedlevel.

CautionAs it is used for normal operations, operating fluid deteriorates and gradually loses its rust inhibiting, lubrication, andfoam inhibiting characteristics. Deteriorated operating fluid creates the risk of malfunction and breakdown. As ageneral rule, replace operating fluid at least once a year.

CautionA very hot hydraulic pump surface indicates the possibility of malfunction and breakdown. Immediately shut downthe pump and take steps to correct the problem.

WarningBefore starting operation, check to make sure that all stop valves are correctly open or closed as required. Particularattention is required in the case of the suction line and return line.

CautionThough there is some vibration during normal operation, extreme vibration may indicate a defective fitting.Continued use creates the risk of accident or breakdown.

CautionUse a current meter to check for abnormally high loads on the motor. A large load can indicate a defective fitting,sticking, etc. Correct the abnormality before operating the pump.

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V

3. Fluid Leaks

4. Filters

5. Pressure Gauges

6. Tank Interior

7. Hydraulic Devices

8. Coolers

■ Handing Precautions During Non-use

■ Disassembly and Inspection Work Precautions

■ Storage Precautions

Caution

If the system will not be operated for long periods, be sure to take proper anti-rust measures. • Not operating the system for long periods without taking anti-rust measures creates the risk of malfunction and

breakdown due to rust. • Be sure to flush the system before using it again after a long period of non-use. Failure to flush out rust inhibitors

creates the risk of malfunction and breakdown.

Caution Never allow cutting oil, grinding oil, clippings, water, or other similar matter to get on hydraulic devices.

CautionFor a water cooler, adjust the temperature adjusting valve to keep the water temperature below 60°C. Orient a fan cooler to allow proper intake, outflow, and flow of cooling air.

WarningNever attempt to modify or reconfigure valves, pumps, or motors. Doing so can cause them to operate and levelsthat are lower for which they are designed, and creates the risk of malfunction and breakdown.

WarningAll disassembly and inspection work should be left up to persons who posses the required special knowledge forsuch work. Attempting disassembly without the required knowledge creates the risk of unexpected accident.Incorrectly performed disassembly and inspection work creates the risk of malfunction and breakdown.

WarningBefore starting disassembly or maintenance work, make sure that all electrical breakers are cut off, and use anelectroscope to check for the presence of electricity. Failure to do so creates the risk of unexpected accident to actuator free running, electric shock, etc.

WarningPerforming work while the electrical circuitry is charged creates the risk of unexpected accident due to electricshock.

WarningAlways make sure to release all residual pressure before starting disassembly work. Performing disassembly workwithout releasing residual pressure creates the risk of accident due to spurting fluid, actuator free running, ordropping, and also creates the risk of malfunction and breakdown.

CautionAlways place valves, pumps, and motors on a secure surface, and never place them on top of hydraulic machinery.Doing so creates the risk of damage to the hydraulic machinery.

Caution Never strike or drop valves, pumps, or motors, and never subject hydraulic equipment to strong external force.

Caution

During reassembly, failure to tighten to proper torques and contaminants getting into piping creates the risk ofmalfunction and breakdown. • Take care to ensure that the tightening torques of hydraulic equipment are uniform and at prescribed levels. • Take care that sealing materials, welding scales, and other contaminants do not get inside of piping.

CautionAfter disassembly and reassembly, double check to make sure that you did not forget to open stopper valves, andthat you have properly tightened all bolts, stopper plugs, couplings, and other required parts before performing thefirst operation.

Caution Seals may need to be replaced before using a product for the first time after long storage.

CautionActual tank inspection needs depend on the contamination level of the operating fluid. As a general rule, the tankshould be emptied of fluid and its interior inspected and cleaned once a year.

CautionAlways be sure to tighten the gauge cock whenever you do not need to viewer the pressure gauge. Deflection of theneedle can damage the pressure gauge.

WarningFluid leaking from welded pipe seams, from a hydraulic pump, from hydraulic machinery, or from other sourcescreates the risk of serious accident. Always be on the lookout for possible leaks.

CautionContinued use of a clogged filter creates the risk of unexpected accident and breakdown. Replace a filter a soon aspossible after it shows signs of clogging. Never operate devices with filter elements removed.

Preliminary/Contents.q 03.11.20 0:32 PM Page V

VI

[NACHI Hydraulic Pumps]

Hydraulic Pump Features or Handling .......................................... A- 1

Hydraulic Pump Selection Table ................................................... A- 2

PVS PVS Series Variable Volume Piston Pumps ...................................................... A- 3PZS PZS Series Variable Volume Piston Pump ........................................................ A- 22PZ PZ Series Load Sensitive Variable Piston Pump ............................................... A- 35PZH PZH Series High-Pressure Variable Volume Piston Pump ................................ A- 42

VDS VDS Series Small Variable Volume Vane Pump ............................................... B- 1VDR . 22D VDR22 Design Series Variable Volume Vane Pump ......................................... B- 6VDR . 13D VDR13 Design Series Variable Volume Vane Pump ......................................... B- 15VDC VDC Series High-Pressure Type Variable Volume Vane Pump ........................ B- 25

VDC Series High-Pressure Type Variable Volume Double Vane PumpUVN UVN Series Variable Volume Vane Uni-pump ....................................................B- 39

IPH IPH Series IP Pump ........................................................................................... C- 1IPH Series Double IP Pump ..................................................................................C- 14

[NACHI Hydraulic Valves]

Hydraulic Valve Features or Handling .......................................... D- 1

Hydraulic Valve Selection Table ................................................... D- 2

Modular Valve Series ........................................................................................................ D- 4G01 Modular Valve Series ................................................................................................ D- 7G03 Modular Valve Series ................................................................................................ D- 9G04 Modular Valve Series ................................................................................................ D- 12OR Relief Modular Valve ......................................................................................... D- 13ORO Brake Modular Valve ......................................................................................... D- 19ORD Direct Relief Modular Valve ............................................................................... D- 23OG Pressure Reducing Modular Valve .................................................................... D- 28OGB Balanced Piston Type Pressure Reducing Modular Valve ................................ D- 35OG Pressure Reducing Modular Valve .................................................................... D- 37OGS Two-Pressure Reducing Modular Valve ............................................................ D- 44OQ Sequence Modular Valve .................................................................................. D- 47OCQ Counter Balance Modular Valve ........................................................................ D- 50OW Pressure Switch Modular Valve ......................................................................... D- 55OY,OCY Flow Regulator Modular Valve .......................................................................... D- 58OF,OCF Flow Control Modular Valve

(Pressure and temperature compensated) ........................................................ D- 66OC,OCV Check Modular Valve ........................................................................................ D- 72OCP Pilot Operated Check Modular Valve ................................................................ D- 79OK Gauge Modular Block ........................................................................................ D- 84OB High-low System Block ...................................................................................... D- 86MOB End Plate, Free Flow Plate, 03/01 Change Plate .............................................. D- 88MSA,MDS Solenoid Valve/Modular Valve Subplate ........................................................... D- 90OTH,OTD Valve Installation Bolt List .................................................................................. D- 93MOB 01, 03 Base Block .............................................................................................. D- 96 High-pressure M35 Series ................................................................................. D- 98

Standard Hydraulic Equipment Contents

Preliminary/Contents.q 03.11.20 0:32 PM Page VI

VII

A

F

E

C

B

D

G

H

I

J

K

L

M

N

O

Piston Pumps

Vane Pumps

Gear Pumps

Modular Valves

Solenoid Valve

Pressure Control Valve

Flow Control Valve

Direction Control Valves

Electro-hydraulic control valve

Hydro-logic Valve

Hydraulic Cylinder

Hydraulic Unit

Hydraulic Accessories

Technical data

Model No. Index

SS SS Series (Wiring System: Central Terminal Box) Wet Type Solenoid Valve .................................................................................. E- 1

SA SA Series (Wiring System: DIN Connector Type) Wet Type Solenoid Valve .................................................................................. E- 13

SE SE Series Pilot Operated Lower Power Solenoid Valve .................................... E- 25SL SL Series (Wiring System : Central Terminal Box)

Wet Type Solenoid Valve ...................................................................................E- 31DSS DSS (DSA) 21 Design Series Solenoid Control Valve ....................................... E- 38SF Fine Solenoid Valve SF Series .......................................................................... E- 46SNH SNH Series Non-leak Type Solenoid Valve ....................................................... E- 50

R Relief Valve ........................................................................................................ F- 1RI RI Series Relief Valve (ISO Mounting, Balanced Piston Type) .......................... F- 5RC,RCD Remote Control Relief Valve .............................................................................. F- 8RSS,RSA Solenoid Controlled Relief Valve ....................................................................... F- 10RIS RI Series Solenoid Controlled Relief Valve ........................................................ F- 15(C)G Pressure Reducing (and Check) Valve .............................................................. F- 18GR Balancing Valve (Pressure Reducing and Relief Valve) .................................... F- 23(C)Q Pressure Control (and Check) Valve ................................................................. F- 25

(C)FR Throttle (and Check) Valve ................................................................................ G- 1(C)FT FT Type Flow Control (and Check) Valve

(With Pressure and Temperature Compensation) ............................................. G- 4(C)F F Type Flow Control (and Check) Valve

(With Pressure Compensation) ......................................................................... G- 8(C)TN TN Type Flow Control (and Check) Valve

(Fine Adjustment Type With Pressure and Temperature Compensation) ..................... G- 11(C)TS TS Type Flow Control (and Check) Valve

(Fine Adjustment Type With Pressure and Temperature Compensation) ..................... G- 14TL,TLT TL (TLT) Type Feed Control Valve

(Fine Control Type With Pressure Compensation) ............................................ G- 16

CA,CN Right Angle Check Valve In-line Check Valve ................................................... H- 1CP Pilot Check Valves ............................................................................................. H- 4K2 Gauge Cock ....................................................................................................... H- 7DMA DMA Type Manual Valve ................................................................................... H- 8 Flange Type Series .......................................................................................... H- 10

Electro-hydraulic Proportional Valve Series ........................................................ I- 1EPR Electro-hydraulic Proportional Pilot Relief Valve ................................................. I- 2ER Electro-hydraulic Proportional Relief Valve ......................................................... I- 4EGB Electro-hydraulic Proportional Relief and Reducing Valve .................................. I- 6(C)ES Electro-hydraulic Proportional Flow Control Valve .............................................. I- 8ESR Load Response Electro-hydraulic Proportional

Relief and Flow Control Valve ............................................................................. I- 11ESD Electro-hydraulic Proportional Flow and Direction Control Valve ........................ I- 14EOG Modular Type Electro-hydraulic Proportional Reducing Valve ............................ I- 22EOF Modular Type Electro-hydraulic Proportional Flow Control Valve ....................... I- 24EMA,EMC Power Amplifier Series for Electro-hydraulic Proportional Valve Drive ..................... I- 26EBA Small Type Power Amplifier Series for

Electro-hydraulic Proportional Valve Drive .......................................................... I- 30EDA,EDC Small Type Multi-function Power Amplifier .......................................................... I- 34

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VIII

ESH High-response proportional flow control valve ESH-G01 .................................... I- 38ESH High-response proportional flow control valve ESH-G03, 04, 06 ........................ I- 40EHA High-speed Response Proportional Control Valve

Amplifier EHA Series ........................................................................................... I- 42EN NACHI-MOOG Electro-hydraulic Servo Valve EN Series ................................... I- 44EA Electro-hydraulic Servo Valve Driver Servo Amplifier ......................................... I- 46

Composite Valve Series Logic Valve ................................................................................. J- 1

FJ FJ Series General Purpose Hydraulic Cylinder ................................................. K- 1

NCP-NACHI PACK (Standard Variable Pump Unit) ...........................................................L- 01NEP-NACHI PACK Economy Series (NEP) .......................................................................L- 18NSP-NACHICCO II (Compact Variable Pump Unit) ...........................................................L- 20NNP-NACHI NN PACK (Low-noise Standard Variable Pump Unit) ...................................L- 24

Hydraulic Accessories ...................................................................................................... M- 1

Operating Fluid ................................................................................................................. N- 1Water-Glycol Type Operating Fluid Hydraulic Devices ..................................................... N- 3SI Units and Conversion Formulas ................................................................................... N- 7

Model No. Index ................................................................................................................ O- 1

Preliminary/Contents.q 03.11.20 0:32 PM Page VIII

qNachi Fujikoshi hydraulic pumps arefinished by high-grade, precisionmachining technology unique to thecomprehensive manufacturer NachiFujikoshi using carefully selectedmaterials and traditional heat treat-ment technology. High performanceand quality are assured with all mod-els of Nachi Fujikoshi hydraulicpumps.

wNoise has been thoroughly reducedon hydraulic pumps, a general sourceof noise on machinery and equip-ment. All models such as the low-noise type IP series can be operatedquietly with little noise.

eAttention has been paid to surfacetreatment and selection of materialsin NACHI hydraulic pumps so thatthey can be applied extensively withfire-resistant hydraulic operating fluid.

qLimit the eccentricity between thedrive shaft and hydraulic pump shaftto 0.05 mm, keep the angle errorwithin 1° and use flexible couplingsfor connections.

wWhen operating hydraulic pumps withbelts, gears and chains, prevent aradial or thrust load exceeding theallowable value from being applied onthe pump shaft. Also, if necessary,install a device that prevents a load(bending force) from being applied atright angles on the shaft. Mounthydraulic pumps so that the pumpshaft is horizontal.

eUse a rigid pump mounting base.rThe direction of rotation is determined

on each hydraulic pump. Operate the hydraulic pump in thecorrect direction of rotation afterchecking the indicated model No. onthe nameplate or the arrow indicatingthe direction of rotation on the body.The direction of rotation is clockwisewhen viewed from the shaft end.

tLimit the suction pressure to withinthe range -0.03 to +0.03 MPa {-0.3 to+0.3 kgf/cm2}.

yWith external drain type hydraulicpumps, directly connect the drain tothe tank, insert the drain pipe underthe oil level, and limit the drain backpressure to 0.03 MPa {0.3 kgf/cm2}.

uWhen connecting steel pipes to thesuction and discharge sides, preventforce pressure from being applied onthe hydraulic pump by the piping.

iSet the clamping length of couplingsand hydraulic pump shafts so that it iswithin at least 2/3 or more of the cou-pling width. Also, use a size of cou-pling that matches the shaft diameter.

oWhen inserting couplings into shafts,insert them gently. When removingcouplings from shafts, be sure to usea pulley extractor. Avoid hitting theshaft when attaching or removingcouplings.

!0Connect to the suction port above thehorizontal to keep oil inside hydraulicpumps.

!1Provide an air bleed valve in circuitswhere it is difficult to release air atstartup.

!2Be sure to use only specified bolts onhydraulic pumps. Use 12T or equiva-lent.

Uni-pumps are compact pump/motorunits which have a motor directly cou-pled to the hydraulic pump. Variable dis-charge volume type vane pumps andpiston pumps are available. As each ofthese pumps are ideally integrated withthe motor, they can be easily installed,and more compact equipment configu-rations can be achieved economically. ¡Standard motor:

totally-enclosed splashproofhousing surface flange cooledself-actuating type (totallyenclosed fan-cooled type)3.7 kW to 4P or less: Class Einsulation5.5 kW to 4P or more: Class BinsulationVoltage 200V…50/60 Hz

220V…60 Hz

qUse mineral oil-based hydraulic oper-ating fluid.

wProvide a suction filter of about 100 to150 mesh on the suction port.

eWhen operating hydraulic pumps at ahigh pressure or when using fire-resistant hydraulic operating fluid, oilcontamination greatly affect pumpservice life. So, use a filter of 25µm orless.

rConsult your agent when using fire-resistant hydraulic operating fluid. When using water- or glycol-basedhydraulic operating fluid, refer to pageN-3 for details on applicable models ofhydraulic pumps.

tFor details on the viscosity ofhydraulic operating fluid, refer to theseparate item "Hydraulic OperatingFluid."

The following describes the meanings ofthe following terms used in this catalog:¡Rated pressure:

The maximum pressure atwhich a hydraulic pump can beused continuously.

¡Maximum operating pressure:The maximum pressure (includ-ing surge pressure) at which ahydraulic pump can be usedwithin six seconds at most with-in 1/10 of the cycle time.

¡Allowable peak pressure:The maximum pressure (setpressure + surge pressure) thatcan be momentarily allowed

¡The following shows the standards inLists of Sealing Parts:JIS standard B2401 (O-ring)JIS standard B2407 (backup ring)SAE standard AS568 (O-ring)

¡Pipe apertures mentioned in this cata-log that are indicated as "G*/*" com-ply with JIS B2351 O-ring seal sys-tems. Note, however, that G3/4adopts dimensions before JIS revi-sions were made in 1990. NachiFujikoshi adopts P24 as the O-ringsize whereas P22.4 is stated in cur-rent JIS standards.

1.Pump discharge flow rate

Qp= (r/min)

q=discharge volume per rotation(cm3/rev)

N=revolution speed(min-1)ηv=volume efficiency

2.Power required for pump drive

WP1= (kW)

= (PS)

P=discharge pressure(MPa)η=overall efficiency

3.Motor revolution spee

N= ·(1–S)(min-1)

f=frequency(50Hz, 60Hz)P=number of motor polesS=slip rate

120·fP

P·Qp44η

P·Qp60η

q·N·ηv1000

Features

Uni-pumps

Management of HydraulicOperating Fluid

Calculation FormulaRequired when Selecting

Hydraulic Pumps andMotor

Installation andMaintenance

A

A-1

Terms Used in This Catalog

NA

CH

I Hyd

raulic P

um

ps

A_Piston(P01-15)_E.q 03.11.20 0:45 PM Page 1

A

A-2

Hyd

raulic P

um

ps

Hydraulic Pump Selection Table

Pump Type Name

Type Classifi-cation

RatedPressure

MPa{kgf/cm2}

Displacement cm3/rev

Page

Var

iabl

e pi

ston

pum

psV

aria

ble

disc

harg

e vo

lum

e va

ne p

umps

Inte

rnal

gea

r pu

mp

PVS series variable piston pump PVS

21{214}

Uni-pump UPV21

{214}

PZS series variable piston pump

PZS21

{214}

PZ load-sensitive variable piston pump PZ

21{214}

PZH series high-pressure variable piston pump

PZH35

{357}

VDS series compact variable vane pump VDS

7{71.4}

Uni-pump USV7

{71.4}

VDR13 design series variable vane pump VDR

6{61.2}

Uni-pump UVD6

{61.2}

VDR22 design series variable vane pump VDR

14{143}

Uni-pump UVD7

{71.4}

VDC series high-pressure variable vane pump VDC

14{143}

Uni-pump

UVN series variable vane uni-pump UVN

8{81.6}

UVC7

{71.4}

A-3

A-19

A-22

A-35

A-42

B-1

B-4

B-6

B-12

B-15

B-22

B-25

B-37

B-39

C-1

C-14

IPH series IP pump IPH25

{255}

IPH series double IP pump IPH21

{214}

1 2 5 10 20 50 100 200 500 1000 2000 5000

3

3

45

45

42 220

2208

28 40

3 8.3

3 8.3

4

4

27.8

27.8

5 44.4

33.35

5

5

88.9

16.1

33.3

3.6 125.9

7.2 251.8

8.1


Pisto

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A

A-3

PVS SERIESVARIABLE VOLUME PISTON PUMP

0

M

*

*

Dischargeport

Suctionport

Drainport

PVS Series VariableVolume Piston Pumps

8.0 to 45.0cm3/rev21MPa

Features

Design No. 30 is applied on PVS-0B to make the pump more compact and lighter, and reduce noise.Production of PVS-3B has been discontinued. Use PZS-3B.Pressure adjustment 3 type has been added to PVS-1B-22 and PVS-2B-45. (Design No. 20 is applied onlyon PVS-2B-45*3.)

Specifications

Energy-saving Type withDrastically Reduced Loss

A NACHI-proprietary semi-circular bar-rel swash plate that receives pressureon its surface ensures a stable dis-charge volume at all times. This elimi-nates excess

discharge volume, and enables theeffective use of power corresponding tothe load cycle.

This "energy-saving type" conservesenergy, reduces power loss, and helpsto reduce hydraulic costs.

Silent Type That DemonstratesIts Power Quietly

Proprietary low-noise mechanisms areincorporated on the shoe, swash plate,valve plate, and other locations toensure silent operation. In particular, asemi-circular barrel swash plate stabi-lizes operation characteristics to ensuresilent operation.

¡Handling¡Cautions during Pump Installation

and PipingzUse flexible couplings for connecting the

pump shaft to the drive shaft, and pre-vent a radial or thrust load from beingapplied on the pump shaft.

xFor centering of the pump shaft, limit theeccentricity between the drive shaft andhydraulic pump shaft to 0.05 mm, andkeep the angle error within 1°.

cSet the clamping length of couplings andhydraulic pump shafts so that it is withinat least 2/3 or more of the couplingwidth.

vUse a sufficiently rigid pump mountingbase.

bSet the pressure on the pump suctionside to -0.03 MPa or more (suction portflow velocity within 2 m/sec).

nRaise part of the drain piping to abovethe topmost part of the pump body, and

insert the return section of the drain pip-ing into the hydraulic operating fluid.Also, observe the values in the followingtable to limit the drain back pressure to0.1 MPa.

¡Management of Hydraulic OperatingFluid

zUse good-quality hydraulic operatingfluid, and use within a kinematic viscosi-ty range of 20 to 200 mm2/sec duringoperation. Use an R&O type and anti-wear hydraulic fluid of ISO-VG32 to 68.The optimum kinematic viscosity duringoperation is 20 to 50 mm2/sec.

xThe operating temperature range is 5 to60°C. When the oil temperature at start-up is 5°C or less, warm up the hydraulicpump by low-pressure, low-operationspeed operation until the oil temperaturereaches 5°C.

cProvide a suction strainer with a filteringgrade of about 100µm (150 mesh). Besure to provide a return line filter of grade20µm or less on the return line to the tank.(When the hydraulic pump is used at ahigh pressure of 14 MPa or more, we rec-ommend providing a filter of 10µm or less.

vManage the hydraulic operating fluid sothat contamination is maintained at classNAS10 or lower.

bUse hydraulic operating fluid within anoperating ambient temperature of 0 to60°C.

(continued on following page)

Model No.

ItemPVS-0BPVS-1B PVS-2B

Pipe joint size 3/8"or more1/2"

or more

Pipe I.D φ7.6 mm dia ormoreφ12 mm

dia or more

Pipe length 1m or less 1m or less

Model No.Volume

cm3/rev

Discharge volume at no-load r/minPressure

adjustment range

MPa

{kgf/cm2}

Permittedpeak

pressureMPa

{kgf/cm2}

Rotating speed min-1 Mass

kg

1000min-1 1200min-1 1500min-1 1800min-1 Min. Max.

PVS-0B-8*0-30

1

2

3

8.0 8.0 9.6 12.0 14.4

2 to 13.5 {20.4 to 35.7}

2 to 17.5 {20.4 to 71.4}

3 to 14. 5{30.6 to 143 }

3 to 21. 5{30.6 to 214 }

25

{255}500 2000 7.7

PVS-1B-16*0-(*)-12

1

2

3

16.5 16.5 19.8 24.7 29.7

2 to 13.5 {20.4 to 35.7}

2 to 17. 5{20.4 to 71.4}

3 to 14 .5{30.6 to 143 }

3 to 21. 5{30.6 to 214 }

25

{255}500 2000 10.5

PVS-1B-22*0--(*)-12

1

2

3

22.0 22.0 26.4 33.0 39.6

2 to 13.5 {20.4 to 35.7}

2 to 17. 5{20.4 to 71.4}

3 to 14. 5{30.6 to 143 }

3 to 21. 5{30.6 to 214 }

25

{255}500 2000 10.5

PVS-2B-35*0--(*)-12

1

2

3

35.0 35.0 42.0 52.5 63.0

2 to 13.5 {20.4 to 35.7}

2 to 17. 5{20.4 to 71.4}

3 to 14 .5{30.6 to 143 }

3 to 21.{ 30.6 to 214 }

25

{255}500 2000 21

PVS-2B-45*0--(*)-12

1

2

3--(*)-20

45.0 45.0 54.0 67.5 81.0

2 to 13.5 {20.4 to 35.7}

2 to 17. 5{20.4 to 71.4}

3 to 14. 5{30.6 to 143 }

3 to 21 .5{30.6 to 214 }

25

{255}500 2000 21

Note) 1. The standard direction of rotation is clockwise when viewed from the shaft end. Consult your agent separately for a counterclockwise direction of rotation.2. A keyed straight shaft is standard. For details on spline shafts, consult your agent separately.


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¡Cautions at StartupzBefore you start pump operation, fill the

pump body with clean hydraulic operatingfluid via the lubrication port.

xAn unload is required when the motor isstarted under condition λ_3. Consultyour agent regarding the circuit.

cMake sure that the pump operates in thedirection of rotation the same as thatindicated by the arrow on the pumpbody.

vAir entering the pump or pipes maycause noise or vibration. At startup, setthe pump discharge side to a no-loadstate, and operate the pump in the inch-ing mode to release any air in the pumpor pipes.

bProvide an air bleed valve in circuitswhere it is difficult to release air at start-up. (See "IP Pumps" on page C-13.)

¡How to Set Pressure and DischargeVolumeThe default pump discharge volume isset to "maximum" and default dischargepressure is set to "minimum". Changethe discharge volume and dischargepressure settings according to your par-ticular operating conditions.

[Pressureadjustment]Turning the pres-sure adjustingscrew CW increas-es the pressure.

[Discharge volumeadjustment]Turning the flowrate adjusting screw CWdecreases thedischarge volume.

Note)· For details regarding the relationship betweenflow rate adjustment length rand pump capacityq, see the tables provided in the installationdimension drawings for each of the pumps.

· Firmly tighten the lock nuts after you have fin-ished adjustments.

[Note]¡Variable control mechanism

Standard typeN* : Pressure compensation type (manual

mode)Option type

P* : Pressure compensation type (remote

control mode)

N*Q* : 2-pressure, 2-flow rate control

R*A&* : Solenoid cutoff controlS

W*A&* : 2-pressure controlS

RQ*A&* : 2-pressure, 2-flow rateScontrol w/ solenoid cutoff

C*A&* : 2-cutoff controlS

¡* : Pressure adjustment range0 : 2 to 3.5MPa {20.4 to 35.7kgf/cm2}1 : 2 to 7MPa {20.4 to 71.4kgf/cm2}2 : 3 to 14MPa {30.6 to 143kgf/cm2}3 : 3 to 21MPa {30.6 to 214kgf/cm2}

¡&* : Applicable to solenoid specifications A, SA&* : SA-G01S&* : SS-G01

1 : 100V 50/60Hz2 : 200V 50/60Hz3 : DC12V4 : DC24V

122N16B1– – – –PVSDesign No. 30: PVS-0*

12: PVS-1*, PVS-2*20: PVS-2*-45N3 only

Pressure adjustment range [Note] Reference

Variable control mechanism [Note] Reference

Max. pump capacity (cm3/rev) Nominal 8, 16, 22, 35, 45

Mounting method B: Mounting flange type A: Mounting foot type

Pump size 0, 1, 2

PVS series variable piston pump

Auxiliary symbol None:Z:

Side port typeAxial port type(PVS-1*, PVS-2*)

*( )

Explanation of model No

Model No. Injection amount cm3

PVS-0B-8 220

PVS-1B-16, 22 300

PVS-2B-35, 45 650

❚NQ, RS, WS, RQS and CS types are not available for the PVS-0B-8, and the NQ, RQS and CS types are not available

for the PVS-1B-1622-Z and PVS-2B-3545-Z.

CW

CCW

Pressureadjustment range

Dis

char

gevo

lum

eD

isch

arge

volu

me

Dis

char

ge v

olum

ead

just

men

t ran

ge

CW

CCW

Pressure

Pressure

N2:3-14MPaDis

char

ge v

olum

eD

isch

arge

vol

ume

Dis

char

ge v

olum

eD

isch

arge

vol

ume

Dis

char

ge v

olum

eD

isch

arge

vol

ume

Dis

char

ge v

olum

e

[Example 1]N*: Pressure compensation type (manual mode)PVS-1B-16N2

P2:3-14MPa[Example 2]P*: Pressure compensation type (remote control mode)PVS-1B-16P2

P2:3-14MPa

sol"ON"

sol"OFF"

[Example 4]R*S*: Solenoid cutoff controlPVS-1B-16R2S2Solenoid specifications200V 50/60HzSS-G01

W2:3-14MPa

sol"ON"

sol"OFF"

[Example 5]W*S*: 2-pressure controlPVS-1B-16W2S1Solenoid specifications100V 50/60HzSS-G01

N2:3-14MPa

Q1:2-7MPa

Discharge pressure

[Example 3]N*Q*: 2-pressure, 2-flow rate controlPVS-1B-16N2Q1

R2:3-14MPa

sol"ON"

sol"OFF"Discharge pressure

Discharge pressure

Discharge pressure

Discharge pressure

Discharge pressure

[Example 6]RQ*S*: 2-pressure, 2-flow rate control w/ solenoid cutoffPVS-1B-16RQ2S1Solenoid specifications100V 50/60HzSS-G01

C2:3-14MPa

sol"ON"

sol"OFF"Discharge pressure

[Example 7]C*S*: 2-cutoff controlPVS-1B-16C2S2Solenoid specifications200V 50/60HzSS-G01


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Variable Control MechanismsStandard type

Option type

Symbol External View Characteristics Hydraulic Circuit Explanation

N

NA

CH

I

Drain portPressureadjusting screwFlow rate

adjusting screw

Dis

char

ge v

olum

e

Discharge pressure

0

M

*

*

Dischargeport

Suctionport

Drainport

Pressure compensation type(manual system)

When the discharge pressurereaches the preset volumeset by the pressure compen-sator, the discharge volume isautomatically reduced to holdthe pressure at the set pres-sure.

P

NA

CH

I

Drain portFlow rateadjusting screw

Pilot port Differential pressureadjusting screw(adjustment forbidden)

Dis

char

ge v

olum

e

Discharge pressure

0

M*

*

PilotportDischargeport

Suctionport

Drainport

Pressure compensation type(remote control mode)

This mode demonstrates thesame characteristics as themanual mode.The discharge pressure canbe adjusted by external pilotpressure. The discharge vol-ume can be adjusted manual-ly. Note 2)

NQ

NA

CH

I

P1 pressure adjusting screw

q1 flow rate adjusting screwq2 flow rateadjusting screw

P2 pressureadjusting screwDrain port

q2

q1

P1

P2

Dis

char

ge v

olum

e

Discharge pressure

0

MN *

*

Discharge port

Suctionport

Drainport

2-pressure, 2-flow rate control typeThe discharge volumechanges in two stages by thepump's built- in sequencevalve. This allows convention-al high/ low pressure controlto be performed on a singlepump unit, and save energy inthe hydraulic circuit.

RS

(RA)

SOL b

NA

CH

I

Drain portPressureadjusting screw(at solenoid ON)

Flow rateadjusting screw

SOL"OFF"

SOL"ON"

Dis

char

ge v

olum

e

Discharge pressure

0

M*

*

Discharge port

Suctionport

Drainport

Solenoid cutoff control typeA solenoid valve for unload isintegrated into the pressurecompensation type to minimizeenergy loss when pump outputis not required. Only a slightamount of heat is generated.

WS

(WA)

NA

CH

I

Drain port

Pressureadjusting screw(at solenoid OFF)


Pressureadjusting screw(at solenoid ON)

SOL b

SOL"OFF"

P1 P2

SOL"ON"

Dis

char

ge v

olum

e

Discharge pressure

0M*

*

Discharge port

Suctionport

Drainport

2-pressure control typeTwo pressure compensationtypes can be obtained byswitching the solenoid valveON/OFF. Two types of outputcontrol are possible with theactuator set to a constantspeed.

RQS

(RQA)

SOL b

NA

CH

I

Drain port


P2 pressureadjusting screw(at solenoid ON)

q1 flow rateadjusting screw

q2 flow rateadjusting screw

P2

q1

q2 P1

SOL OFF

SOL ON

Dis

char

ge v

olum

e

Discharge pressure

*

*0

MN

Discharge port

Suctionport

Drainport

2-pressure, 2-flow rate control typew/ solenoid cutoff

The discharge volume can bechanged in two stages by thesequencer valve and solenoidvalve for unload mounted onthe pump, and unloading ispossible when pressure oil isnot required.

CS

(CA)

NA

CH

I

Drain port


q1 flow rate adjusting screwq2 flow rateadjusting screw

Differential pressureadjusting screw(adjustment forbidden)

q1

q2

P1 P2SOL OFF

SOL ON

Dis

char

ge v

olum

e

Discharge pressure

* *0

MN

Discharge port

Suctionport

Drainport

2-cutoff control typeTwo types of pressure - flowrate characteristics can beobtained by the solenoid valveand cylinder mounted on thepump.

Note 1) Many other variable control mechanism are also available in addition to those in the above table. Please consult your agent for details.Note 2) We recommend ZR-T02-*-5895* as the remote control valve. For details, consult your agent. Prevent the pipe volume up to the remote control

valve from falling below 150cm3.


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Manual mode: standard type

Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm2/s

PVS-0B-8N*-30

List of Sealing Parts

Pressure Compensation Type

Installation Dimension Drawing

Cross-sectional Drawing

Performance Curves

Discharge portSuction port

G(Former PF)1/2G(Former PF)3/4

MINPressure compensator

Lubrication port

Drain portRc3/8

Lock nut

0–0.012

Discharge portG(Former PF)1/2

Lock nut

142

6

29

110130

R46

106.4

4911

47

78

53.2

132

77

3

11

164.5(MAX)

(flow rateadjustmentlength)18 6

19.0

521

.282

.6

149.5

14

127.5

49.5

525.4

214( MAX)

42.5

510

0 –0.0

210 –0.2

5

f–0

.036

–0.0

71


Pressureadjusting screw

Key width 4.76

Part No. Part Name Part No. Part Name Part No. Part Name

123456789

1011121314

BodyCaseShaftCylinder barrelValve platePistonShoeShoe holderBarrel holderSwash plateThrust bushSpring holderGasketSpring C

1516171819202122232425262728

Spring S Control pistonGuide pinParallel keyRetainerNeedleBall bearingNeedle bearingOil sealSnap ringSnap ringSnap ringO-ringO-ring

29303132

33

34353637383940

Parallel pinSpring pinHexagon socket head boltCross-recessed countersunkhead screwHexagon socket setscrewHexagon nutHexagon plugMetal plugNameplateLubrication port plateCAUTION plateRivet

Parts marked by an asterisk "*" are not available on the market.Consult your agent.

10

10

8

6

4

2

3

5 15

PVS-0

B-8N*

-30

cm3 /

rev

Relationship between flow rateadjustmentlength ( ) and pump capacity (q)

Pum

p ca

paci

ty q

cm

3 /re

v

Flow rate adjustment range

Flow rate adjustment length mm

Discharge volume Q

Volume efficiency ηv

Overall efficiency η

Input Lin

1800min–1

1800mi

n–1

1500min

–1

1500min–1

14{143}

7{71.4}

0

5060

15141312

6

4

2

0

708090

100

Discharge pressure P MPa {kgf/cm2}

General Performance

21{214}

Input Lin

Drain volume DR

Discharge volume Q1800min–1

1800mi

n–1

1500min

–1

1500min–1

14{143}

7{71.4}

00

2

4

6

4

2

0

14

12


Pressure - DischargeVolume Characteristics

21{214}

1800min–1

1500min–1

1500/180

0min–1

1500min–1

14{143}

7{71.4}

0

2.0

1.5

1.0

0.5

0

Full cutoff pressure MPa {kgf/cm2}

Axial Input at Full Cutoff

21{214}

14{143}

7{71.4}

050

60

80

70


At full cutoff

Measurement position: 1m rear of pump

Noise Characteristics

21{214}

Q=14.4r/minQ=12r/minQ=10r/minQ=8r/minQ=6r/min

14{143}

7{71.4}

00

1

2

7

6

5

4

3


Axial Input

21{214}

1800min–1

Effi

cien

cyη,

ηv%

Dis

char

ge v

olum

eQ

lite

r/m

inIn

put L

in k

W

Inpu

t Lin

kW

Dis

char

ge v

olum

eQ

lite

r/m

inD

rain

vol

ume

DR

lite

r/m

in

Axi

al In

put k

W

Axi

al in

put a

t ful

l cut

off k

W

Noi

se le

vel d

B(A

)Set a flow rate adjustment length withinthe above range. Oil will leak if the pumpis operated below the adjustment rangelower limit.

PartNo.

Part Name Q'tyPVS-0B-8

Size Remarks

13 Packing 1 PS46-100000 3 Bond

23 Oil seal 1 TCV-254511 N.O.K

27 O-ring 1 1B-P9 JIS B 2401

28 O-ring 1 1B-P11 JIS B 2401


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PVS-1B-16N*-(Z)-1222(side port type)

(axial port type)

Parts marked by an asterisk "*" are not available on the market.Consult your agent.


Part No. Part Name Part No. Part Name

123456789

101112131415161718192021

BodyCaseShaftCylinder barrelValve platePistonShoeShoe holderBarrel holderSwash plateThrust bushSeal holderGasketSpring CSpring SControl pistonNeedleKeyNutRetainerPlug

222324252627282930313233

3435363738394041

Ball bearingNeedle bearingOil sealSnap ringSnap ringSnap ringO-ringO-ringO-ringPinHexagon socket head boltCross-recessed coun-tersunk head screwHexagon socket set screwMetal plugNameplateCAUTION plateSpring holderLubrication port plateRivetGuide pin

Part No. Name Q'ty Size Remarks

13 Gasket 1 * Nihon Gasket24 Oil seal 1 TCN-254511 N.O.K

28 O-ring 1 1B-G55 JIS B 2401

29 O-ring 1 1B-P9 JIS B 2401

30 O-ring 1 1B-P14 JIS B 2401

(MIN)

NA

CH

I

Drain portRc3/8

Key width4.76 0–0.012

4-M10X16

24

Lubrication port

Discharge portSAEJ518b-3/4

Suction portSAEJ518b-1

525.4

12.5158

22±0.2

47.5

±0.2

649.577

181

5.5

236.5(MAX)

43

23

106.4

130

52

11738

8

42

124

8213

73

rFlow rateadjustment length

19.0

521

.282

.6

0–0

.021

0–0

.25

φ

φ

–0.0

36–0

.071

φ



NA

CH

I

Rc3/8

4.76 0–0.012

4-M10X164-M10X16

SAE J518b-3/4SAE J518b-1

525.4

12.5

649.577

55

236.5(MAX)

42.5

23(MIN)

183 106.4130

52

1173

88

42

82

137

3

3030110

52.4

±0.2

47.5

±0.2

120 r

19.0

521

.2

82.6

0 –0.0

210 –0

.25

φ

φ

–0.0

36–0

.071

22±0.226.2±0.2(suction port24 mm dia.)

(discharge port24 mm dia.)


Flow rateadjustment length Drain port Pressure

adjusting screw

Key width

Pressure compensator Lubrication port

5 10 15

10

20

Flow rate adjustment lengthr mm

PVS-1

B-16N

*-12

PVS-1

B-22N

*-12

0

30

20

16.5

22

7 5



Relationship between flow rate adjustmentlength (r) and pump capacity (q)

Pum

p ca

paci

ty q

cm

3 /re

v

Set a flow rate adjustment lengthwithin the above range. Oil willleak if the pump is operatedbelow the adjustment range lowerlimit.


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Performance Curves Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm2/sPVS-1B-16N*(Z)-12

Discharge volume Q Dischargevolume Q



Input Lin

1800min–1

1800mi

n–1

1500min

–1

1500min–1

14{143}

7{71.4}

0

5040

60

3028262422

12

810

42

6

0

708090

100


General Performance

21{214}

Input Lin

Drain volume DR

1800min–1

1800mi

n–1

1500min

–1

1500min–1

14{143}

7{71.4}

00

2

4

12

8

4

0

2830

24



21{214}

1800min

–1

1500min–1

1800min–

1

1500min–1

14{143}

7{71.4}

0

2.0

1.5

1.0

0.5

0



21{214}

14{143}

7{71.4}

0

60

80

70


At full cutoff

Full cutoff pressureFull cutoff pressure

7MPa3.5MPa

Tank capacity 40


Revolution speed 1800 min–1


21{214}

Q=30r/min

Q=25r/min

Q=20r/min

Q=15r/min

Q=10r/min

14{143}

7{71.4}

00

2

4

14

12

10

8

6


Axial Input

21{214}

640 1 3 5 72

0

30

20

10

Time Hr

Oil Temperature Rise CharacteristicsPVS-1B-16N1-12

8

Full cutoff pressureFull cutoff pressure

7MPa3.5MPa

Tank capacity 60

Revolution speed 1800 min–1

640 1 3 5 72

0

30

20

10

Time Hr8

Effi

cien

cyη,

ηv%

Dis

char

ge v

olum

eQ

r/m

inIn

put L

in k

W

Inpu

t Lin

kW

Axi

al in

put k

W

Dra

in v

olum

eD

R r

/min

Dis

char

ge v

olum

eQ

r/m

in

Axi

al in

put a

t ful

l cut

off k

W

Noi

se le

vel d

B(A

)

Tem

pera

ture

diff

eren

ceTe

mpe

ratu

re d

iffer

ence

Performance Curves Typical characteristics at hydraulic oper-ating fluid kinematic viscosity of 32 mm2/sPVS-1B-22N*-(Z)-12

0 7 14 0

4

8

12

1800m

in–1

1500m

in–1

Input Lin

6050

708090

100

40353025

21

1614

10

6

2

{71.4} {143} {214}Discharge pressure P MPa {kgf/cm2}


1800min–1

1500min–1

General PerformanceDischargevolume Q

Dis

char

ge v

olum

eQ

lite

r/m

inIn

put L

in k

W

Effi

cien

cyη,

ηv%


2170 14 0

4

8

12

Input Lin

1800m

in–1

1500m

in–1

{143}{71.4}

40

{214}

30

16

1800min–1

1500min–1

Pressure - Flow RateCharacteristics

0

2

4

Drain volume DR


Dis

char

ge v

olum

eQ

lite

r/m

inD

rain

vol

ume

DR

lite

r/m

in

Discharge volume Q

Inpu

t Lin

kW

21

14

70 140

4

8

12

{143}

6

{71.4} {214}

2

10

16Axial Input

Q=40

Q=35

Q=30

Q=25

Q=20

r/min

r/min

r/min

r/min

r/min


Axi

al in

put k

W

7

1500min–1

1800min–

1

{214}0

2.0

21140

{143}

0.5

1.0

1.5

Axial input at full cutoff kW

{71.4}Discharge pressure P MPa {kgf/cm2}

Axi

al in

put a

t ful

l cut

off k

W

{143}21

{214}

60

500

80

1800min–1

1500min–1

7 14

70


{71.4}


At full cutoff


Noi

se le

vel d

B(A

)


A

A-9

Pisto

n P

um

ps


PVS-2B-35N*-(Z)-1245


PVS-2B-35N*-(Z)-12(20)45(side port type)

(axial port type)

PVS-2B-45N3-(Z)-20

PartNo.

Part Name

123456789

101112131415

BodyCaseShaftCylinder barrelValve platePistonShoeShoe holderBarrel holderSwash plateThrust bushSeal holderGasketSpring CSpring S

PartNo.

Part Name

161718192021222324252627282930

Control pistonNeedleKeyNutRetainerPlugBall bearingNeedle bearingOil sealSnap ringSnap ringSnap ringO-ringO-ringO-ring

PartNo.

Part Name

313233

34

35

3637383940414243

Backup ringPinHexagon sockethead boltCross-recessed coun-tersunk head screwFlow rate adjust-ing screwMetal plugNameplateCAUTION plateSpring holderGuideLubrication port plateOrificeRivet


PartNo.

Part Name

123456789

10111213141516

BodyCaseShaftCylinder barrelValve platePistonShoeShoe holderBarrel holderSwash plateThrust bushSeal holderGasketSpring CSpring SControl piston

PartNo.

Part Name

17181920212223242526272829303132

NeedleKeyNutRetainerPlugRoller bearingNeedle bearingOil sealSnap ringSnap ringSnap ringO-ringO-ringO-ringBackup ringPin


PartNo.

Part Name

33

34

35

363738394041424344454647

Hexagon sockethead boltCross-recessed coun-tersunk head screwFlow rate adjust-ing screwMetal plugNameplateCAUTION plateSpring holderGuideLubrication port plateOrificeRivetOrificePinO-ringPlug

Parts marked by an asterisk "*" are not available on the market. Consult your agent.

Parts marked by an asterisk "*" are not available on the market. Consult your agent.

NA

CH

I

Pressure adjusting screwLock nut

A Bcm3/rev

0 to 30 to 2

3

22.23 0–0.0210

–0.524.9

25.385 0–0.0250

–0.2527.85

12D

20D

35

45


Suction portDischarge port

101.

6

53338

60

6

19215

28

88317 (MAX)

222

69.5

60 MIN

A B

144146172

6513

345

104

172

r

Drain portRc1/2

Key width6.3+0.015–0.010

4-M10X16

SAEJ518b-1 SAEJ518b-1 4

26.2±0.2

52.4

±0.2 0 –0

.051

1/

Flow rateadjustment length


PressureRange

DesignNo.

020

10

Flow rate adjustment lengthr mm

20

30

40

50

PVS-2

B-35N

*-12

PVS-

2B-45

N*-12

(20)

45

35

11

8

25 30 35



Relationship between flow rate adjustmentlength (r) and pump capacity (q)

Pum

p ca

paci

ty q

cm

3 /re

v

NA

CH

I

Drain portLock nut

Key width


SAE J518b-1

4-M10X16

53438

6

15

88

69.5

220

6060(MIN)

146172

6513

45 310

417

2

128

52.4

±0.2

58.7

±0.2

30.2±0.2

37 37140

26.2±0.24-M10X16

SAE J518b-11/4

Rc1/2

257 (MAX)

r

6.3 +0.015–0.010

A Bcm3/rev

3

22.23 0–0.0210

–0.524.9

25.385 0–0.0250

–0.2527.85

12D

20D

35

45

101.

6

A B0 –0

.051


Flow rateadjustment length


PressureRange

DesignNo.

(suction port28 mm dia.)

(discharge port28 mm dia.)

0 to 30 to 2

Part No. Part Name Q'tyPVS-2B-35/45

Size Remarks

13 Gasket 1 * Nihon Gasket

24 Oil seal 1 TCN-305011Z N.O.K

28 O-ring 1 1B-G70 JIS B 2401

29 O-ring 1 1B-P14 JIS B 2401

30 O-ring 1 1B-P11 JIS B 2401

31 Backup ring 1 T2-P11 JIS B 2407

Part No. Part Name Q'tyPVS-2B-45N3

Size Remarks

13 Gasket 1 * Nihon Gasket

24 Oil seal 1 TCN-305011Z N.O.K

28 O-ring 1 1B-G70 JIS B 2401

29 O-ring 1 1B-P14 JIS B 2401

30 O-ring 1 1B-P11 JIS B 2401

46 O-ring 2 1B-P5 JIS B 2401

31 Backup ring 1 T2-P11 JIS B 2407

Set a flow rate adjustment lengthwithin the above range. Oil will leakif the pump is operated below theadjustment range lower limit.


A

A-10

Pisto

n P

um

ps

Discharge volume Q



Input Lin

1800min–1

1800min

–1

1500min

–1

1500min–1

14{143}

7{71.4}

0

5060

65605550

30

20

10

0

708090

100

Discharge pressure P MPa {kgf/cm2} Discharge pressure P MPa {kgf/cm2}

General Performance

21{214}

Input Lin

14{143}

7{71.4}

00

2

4

30

20

10

0

70

60

50

21{214}

1800min–1

1500min–1

14{143}

7{71.4}

0

4

3

2

1

0



21{214}

14{143}

7{71.4}

00

4

8

28

24

20

16

12


Axial Input

21{214}

Q=60r/min

Q=50r/min

Q=40r/min

Q=30r/min

Effi

cien

cyη,

ηv%

Dis

char

ge v

olum

eQ

r/m

inIn

put L

in k

W

Dischargevolume Q

Drain volumeDR

1800min–1

1800mi

n–1

1500min

–1

1500min–1


Inpu

t Lin

kW

Dra

in v

olum

eD

R r

/min

Dis

char

ge v

olum

eQ

r/m

in

Axi

al in

put k

W

Axi

al in

put a

t ful

l cut

off k

W

At full cutoff1500min

–11800min

–1

{143}21

{214}

60

500

80

7 14

70


{71.4}



Noi

se le

vel d

B(A

)

21{214}

5060

7{71.4}

0 14{143}

0

10

20

30

Input Lin 1800m

in–1

1500min

–1

708090

100

7580

7065



Dischargevolume Q

1500min–1

General Performance

1800min–1


Effi

cien

cyη,

ηv%

Dis

char

ge v

olum

eQ

lite

r/m

inIn

put L

in k

W

70

7

4

{214}

2

0 2114

1800min–1

0

{143}

10

20

1500min–1

30

0


{71.4}

80

60


Input Lin

Discharge volume Q

Drain volume DR

1800mi

n–1

1500min

–1

Inpu

t Lin

kW

Dra

in v

olum

eD

R li

ter/

min

Dis

char

ge v

olum

eQ

lite

r/m

in

21

28

70 140

8

16

24

Q=80r/minQ=70r/minQ=60r/min

Q=50r/min

Q=40r/min

{143}

12

{71.4} {214}

4

20

32Axial Input


Axi

al in

put k

W

{143}21

{214}

00

1800min–1

1500min–1

7 14


{71.4}

1

2

3

4


Axi

al in

put a

t ful

l cut

off k

W

At full cutoff1500min

–11800mi

n–1

{143}21

{214}

60

500

80

7 14

70


{71.4}



Noi

se le

vel d

B(A

)

Performance Curves Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm2/sPVS-2B-35N*-(Z)-12

Performance Curves Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm2/sPVS-2B-45N*-(Z)-12(20)


A

A-11

Pisto

n P

um

ps

Response Performance

Pressure Compensator

Model No.Response Time (s) Surge Pressure MPa{kgf/cm2}

t1 t2 PS

PVS-0B-8 0.03 to 0.04 0.04 to 0.06 12 to 4{20.4 to 40.8}

PVS-1B-16 0.05 to 0.06 0.07 to 0.08 14 to 7{40.8 to 71.4}

PVS-1B-22 0.05 to 0.06 0.07 to 0.08 15 to 8{51 to 81.6}

PVS-2B-35 0.05 to 0.06 0.05 to 0.07 16 to 9{61.2 to 91.8}

PVS-2B-45 0.05 to 0.06 0.05 to 0.07 16 to 9{61.2 to 91.8}

0

MM

Ps

14MPa

1MPa 1MPa

FC

SOL ONSOL OFFSOL OFF

MPa

Time s

(Q=0)

(Q=MAX)

Q

t1

t2

Test CircuitPiping volume 400 cm3

Pressure MPa

Lege

nd

Response performance changes according to pipe volume and size. Use an anti-surging valve to prevent surge voltage.

Note) O-ring 1A/B-** refers to JIS B2401-1A/B.


PartNo.

Name Q'tySize

For 0B, 1B, 2B

9 O-ring 1 1A-P14

10 O-ring 3 1B-P6

11 O-ring 1 1B-P10

Part No. Part Name Part No. Part Name

1234567

BodySpoolHolderPlungerSpringRetainerPressure adjusting bolt

891011121314

NutO-ringO-ringO-ringPlugPlugMounting bolt


A

A-12

Pisto

n P

um

ps

Pressure Compensation Type (remote control mode)

PVS-0B-8P*-30

PVS-2B-35P*-12(20)45

PVS-1B-16P*-1222

Rc1/4

NA

CH

I

Rc3/8

4.76

4–M10x16

SAEJ518b-3/4 SAEJ518b-1

525.4

12.5158

22±0.2

47.5

±0.2

6

49.577

181

55

43

236(MAX)

106.4

130

52

1173

88

42

124

8213

7

360

r

24f

19.0

5

21.2

82.6

0 –0.2

5

0–0

.021

φ

φ–0

.036

–0.0

71

0–0.012

Flow rate adjust-ment lengthFlow rate adjust-ing screw

Pilot portDrain port

Key width

Differential pressure adjusting screw(adjustment forbidden)

Lubrication port

Discharge port Suction port

G(Former PF)3/2

G(Former PF)1/2

Rc3/8

4.760

–0.012

Rc1/4

142

77

29

110130

R46

106.4

4911

47

78

53.2

132

6

3

11

164.5(MAX)6

19.0

5

21.2

82.6

149.5127.5

49.5

525.4

214(MAX)

42.5

510

93.518

0 –0.2

5

0 –0.0

21φ

φ–0

.036

–0.0

71r

(flow rate adjustment length) Pilot port

Drain port

Lock nut

Flow rate adjusting screw Key width

Discharge port


Lubrication port

G(Former PF)1/2

Explanation of model No.:

Pressure adjustment range 0: 2- 3.5MPa {20.4- 35.7kgf/cm2} 1: 2- 7MPa {20.4- 71.4kgf/cm2} 2: 3-14MPa {30.6-143kgf/cm2} 3: 3-21MPa {30.6-214kgf/cm2}

P: Pressure compensation type (remote control mode)

Max. pump capacity (cm3/rev) Nominal 8, 16, 22, 35, 45

Pump size 0, 1, 2

Design No. 30: PVS-0* 12: PVS-1*, PVS-2* 20: PVS-2*-45P3 only

30P8B0– – –PVS *

SAEJ518b-11/4SAEJ518b-1

Rc1/4

NA

CH

I

Rc1/2

4–M10x16

6.3 +0.015–0.010

144146172

6513

45

104

172

3

101.

6

53338

606

1921526.2±0.2

52.4

±0.2

88

317(MAX)

222

69.5

r

28φ

A B0 –0

.051

φ

φ

φ

A Bcm3/rev

3

22.23 0–0.021 0–0.524.9

25.385 0–0.025 0–0.2527.85

12D

20D

35

45

Pilot port pp

Lock nut

Drain port

Flow rate adjusting screw

Differential pressure adjusting screw (adjustment forbidden)

Lubrication port


Pressure Range

Design No.

Flow rate adjustment length

Key width

0 to 30 to 2

P-Q Characteristics

Set by remotecontrol V

Max

. pum

p ca

paci

ty q

cm

3 /re

v

Discharge pressure P MPa



A

A-13

Pisto

n P

um

ps

2-pressure, 2-flow Rate Control Type

PVS-1B-16N*Q*-1222

PVS-2B-35N*Q*-12(20)45

(MIN)

NA

CH

I

Rc3/8

4.76 0–0.012

4–M10x16


525.4

21.2

82.6

12.5158

22±0.2

47.5

±0.2

6

77

181

19.0

5

49.5

43

296(MAX)

23

106.4

130

5211

73

88

42

12482

137

3

107.5(MAX)

24φ

0–0

.25

–0.0

71–0

.036

0 –0.0

21φ

φ

Drain port P2 pressure adjusting screw

q1 flow rate adjusting screw


Key width




NA

CH

I

Rc1/2

4–M10x16

6.3+0.015–0.010

SAEJ518b-11/4SAEJ518b-1

101.

6

53338

6

1921526.2±0.2

52.4

±0.2

88

222

352(MAX)

60

60(Min)

144146172

6513

45

107.5(MAX)

104

3

172

A B

0 –0.0

51φ

φ

φ

28φ

A Bcm3/rev

3

22.23 0–0.021 0–0.524.9

25.385 0–0.025 0

–0.2527.85

12D

20D

35

45

Drain portP2 pressure adjusting screw



Key width




Pressure Range

Design No.

0 to 30 to 2

NQ: 2-pressure, 2-flow rate control

Max. pump capacity (cm3/rev) Nominal 16, 22, 35, 45

Pump size 1, 2

Pressure adjustment range N*: High-pressure adjustment range, P2Q*: Low-pressure adjustment range, P10: 2- 3.5MPa {20.4- 35.7kgf/cm2}1: 2- 7MPa {20.4- 71.4kgf/cm2}2: 3-14MPa {30.6-143kgf/cm2}3: 3-21MPa {30.6-214kgf/cm2}

123 1QN16B1– – –12: PVS-1*, PVS-2*20: PVS-2*-45N3Q*

Design No.

Explanation of model No.: PVS

Pump Model No. q2 Adjustment Range (cm3/rev) Default q2 (Setting cm3/rev)

PVS-1B-16 0 to 10 3.3

PVS-1B-22 0 to 13 4.4

PVS-2B-35 0 to 19 7

PVS-2B-45 0 to 24 9

Note 1) The setting range of maximum pump capacity q1 varies according to the setting ofq2.

Note 2) Overall efficiency at a low flow rate is worse than at the maximum flow rate. Pay atten-tion to this when selecting the motor capacity for the drive.


P1

q1

q2

0 P2

P1

q1

q2

0 P2

P-Q Characteristics


Pum

p ca

paci

ty q

cm

3 /re

v (N

ote

2)

P-Q Characteristics


Pum

p ca

paci

ty q

cm

3 /re

v (N

ote

2)


A

A-14

Pisto

n P

um

ps

Solenoid Cutoff Control Type

PVS-1B-16R*A*-1222 S

PVS-2B-35R*A*-12(20)45 S

❚The coil surface temperature increases if this pump is kept continuously energized.Do not touch the surface of the coil directly with your hands.


SOL b

NA

CH

I

Rc3/8

4.76 0–0.012

4–M10x16106.4

130

52

11

124

82

137

3

108

215(

SS

-G01

)17

7(S

A-G

01)

42

525.4

21.2

82.6

12.5158

22±0.2

47.5

±0.2

677

181

55

19.0

5

43

47.449.5

199.8

24φ –0.

036

–0.0

71

0 –0.2

5

φ

0–0

.021

Pressure adjusting screw (at solenoid ON)

Drain port


Key width

Lubrication port



SAEJ518b-11/4

Rc1/4

NA

CH

I

SOL bRc1/2

144146172

6513

45

194.

5(S

A-G

01)

236(

SS

-G01

)

90.5 10

43

172

53338

606

1921526.2±0.2

52.4

±0.2

88

317(MAX)

222

69.5

SAEJ518b-1

101.

6

A B0 –0

.051

φ

6.3 +0.015–0.010

4–M10x16

28φ

A B

22.23 0–0.021 0–0.524.9

25.385 0–0.025 0–0.2527.85

12D

20D φ

φ

cm3/rev

3

35

45

Pressure Range

Design No.


Lock nut

Flow rate adjust-ing screw

Pilot port

Drain port


Key width


Lubrication port

Suction portDischarge port

0 to 30 to 2


R : Solenoid cutoff controlAS


Pump size 1, 2

1: AC100V2: AC200V3: DC12V4: DC24V

Solenoid power supply

A: SA-G01S: SS-G01

Solenoid specifications

122 1SR16B1– – –Explanation of model No.: PVS


SOL"ON"

SOL"OFF"

P-Q Characteristics


Pum

p ca

paci

ty q

cm

3 /re

v


A

A-15

Pisto

n P

um

ps

2-pressure Control Type

PVS-1B-16W*A*-1222 S

PVS-2B-35W*A*-12(20)45 S

❚The coil surface temperature increases if this pump is kept continuously energized.Do not touch the surface of the coil directly with your hands.

SOL b

NA

CH

I

Rc 3/8

4–M10x16

SAEJ518b-3/4

525.4

21.2

82.6

12.5158

22±0.2

47.5

±0.2

677

181

55

19.0

5

43

49.5

106.4

130

52

11

42

124

8213

73

127

0 –0.2

5

0 –0.0

21φ

–0.0

36–0

.071

φ

4.76 0–0.012

24φ

233(

SS

-G01

)19

5(S

A-G

01)

Pressure adjusting screw (at solenoid OFF)


Drain port


Key width

Discharge port Suction portSAEJ518b-1

Lubrication port


SAEJ518b-11/4

Rc 1/4

NA

CH

I

SOL bRc 1/2

4–M10x16

144146172

6513

45

90.5 10

43

172

53338

606

1921526.2±0.2

52.4

±0.2

88

317 (MAX )

222

69.5

28φ

A B

101.

6–0

.051

0φ

6.3 +0.015–0.010

SAEJ518b-1

212.

5(S

A-G

01)

254(

SS

-G01

)

φ

φ

A Bcm3/rev

3

22.23 0–0.021 0–0.524.9

25.385 0–0.025 0

–0.2527.85

12D

20D

35

45

Pressure Range

Design No.

Pressure adjusting screw (at solenoid OFF)

Lock nut


Pilot port pp

Drain port



Key width


Lubrication port


0 to 30 to 2


W : 2-pressure controlAS


Pump size 1, 2

1: AC100V2: AC200V3: DC12V4: DC24V

Solenoid power supply

A: SA-G01S: SS-G01

Solenoid specifications

122 1SW16B1– – –Explanation of model No.: PVS


SOL"ON"

SOL"OFF"

P1 P2

P-Q Characteristics


Pum

p ca

paci

ty q

cm

3 /re

v


A

A-16

Hyd

raulic P

um

ps

2-pressure, 2-flow rate Control Type w

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