The check valves are screwed into a simple, threadedcavity. The body is sealed by an O-ring on the shoulderformed by the acute drill angle 118º.
The valve body consists of two parts connected byflanging (RK) or pressing together (RB) with a spring-loaded, hardened, and polished hemisphere of stainlessbearing steel located between them. The seat is alsohardened and polished.
Code RK0 RK1 RK2 RK3 RB1 RB2 RB3
Flow approx. [l/min] 10 20 50 80 20 50 80
Working pressure [bar] 700 700 700 500 700 700 500
HydraulicsFlow direction see symbolsPressure medium Hydraulic oil as per DIN 51 524 ... 536Viscosity recommended [mm²/s] 30 ... 80
max. admiss. [mm²/s] 20 ... 380Pressure fluid temperature [°C] -20 ... +60Permissible contamination NAS 1638 class 9, to achieve with filter β10 x = 75Nominal pressure [bar] 350
Flow [l/min] 250 450 900 1300 1800 3600 5250 8000
Opening pressure, spring [bar] L = 0.1; N = 0.5; S = 1.6; U = 4.0
Manatrol check valves of the series CS for manifoldmounting provide free flow in one direction and block flowin the counter direction. Depending on material specifi-cation, these valves are suited for use in hydraulic andpneumatic systems.
Specific Manatrol poppet and poppet guides ensure reli-able functional integrity even at high flow rates and/orpulsations.
Technical data
CS SSteelbody
∆∆∆∆∆p/Q performance curves
The curves refer to hydraulic oil of 33 cSt and 50°C
6-18
CS.PM6.5 RH
Check ValveSeries CS
Catalogue HY11-2500/UK
6
Dimensions
Size ØD ØA L L1 L2 L3 L4 L5 B3 B2 B1 B H H1 H2 H3 Weight [kg]
The diagram shows a poppet made of stainless steel. Incontrast to balls, poppets offer lower wear and preventchatter. An exact guide for the poppet and spring en-sures function stability.
Ordering code
Manatrol check valves of the series C for pipelineinstallation provide free flow in one direction and blockflow in the counter direction. Depending on material speci-fication, these valves are suited for use in hydraulic andpneumatic systems.
Specific Manatrol poppet and poppet guides ensure reli-able functional integrity even at high flow rates and/orpulsations.
Technical data
Code
omit
9
C
Size 200 400 600 800 1200 1600
Working pressure Steel [bar] 350 350 350 350 350 210
Valve without pre-relief RHC 3/2The valve element is a ball and guarantees a fast open-ing of the full flow section diameter A → B during theopening operation. The switching speed of the spool isdamped. An abrupt opening and, as a result, any reliefshocks are thus prevented to a large extent. If they stillappear during the test run, then an additional throttlingpoint should be installed in the pilot fluid supply line, or avalve with pre-relief should be used.
Valve with pre-relief RHC 33VThe valve element is a spherically grinded piston (ballseat) with integrated ball check valve that is opened al-ready prior of the main piston during the opening opera-tion and opens a throttling section diameter for a shock-free relief of the consumer volume. It should be usedprimarily for high operating pressure levels and largeconsumer volumes. An additional throttling of the pilotfluid line increases the damping effect of the pre- relief.
Valve with pre-relief and drain port RHCE 33VFunction identical with RHC 33V, but with drain port.
Material Total steel design, valve side bodypart, hardened, polished valve seat
Mounting Screwed-in intake hole of a body, observe dimension tolerance for thread corehole D1.
Mounting position as desired
Connections A, B = main passageZ = pilot oil connectionL = drain port not pressurised to the tank
Flow polarity B → A open; A → B in off position(connection Z not pressurised) blocked drain-free, when no or lower pilot pres-sure at B than at A A → B open, when the valve is blocked due to the pilot pressure at Z (see also pilot pressure pSt).
Opening pressure [bar] approx. 0.5 (B → A)
Pilot pressure pSt [bar] For pilot-operation pSt = pA + 2.5
(orientation calculation) ψ
to keep it open pSt ≈ pB + ∆p + 4.5
y
y see pilot ratiopA = pressure at ApB = pressure at B∆p/Q performance curves (subsequently)
Pressure fluid Hydraulic oil as per DIN 51 524 TI.1 to 3 ISO VG 10 to 68 as per DIN 51 519
Viscosity range min. approx. 4; max. approx. 1500 mm²/s
Optimal operation approx. 10...500 mm²/sAlso suitable for biodegradable pressure fluids types HEPG (polyalkyleneglycol) and HEES (synth. Ester) at operating temperatures up to approx. 70°C.
Environmental temperature [°C] approx. -40...+80, oil: -25...+80,watch out for viscosity range Starting temperature permitted up to -40°C, observestarting viscosity,if the equilibrium temperature in final operation is at least 20Khigher. Biodegradable pressure fluids: observe manufacturing specifications.While considering the seal compatibility not over +70°C.
Intake hole when using screw plugs DIN 908 and 910 with sealingrings as per DIN 7603.
Dimensions RHC 3/2
¹) D1 is decisive for leakage in the pilot line. Leakage at 300 bar ≈0.05 l/min, if the tolerances are maintained.
²) The thread depth T1-b and the spacing of the hole Ø D3 (connec-tion side B) T1-c are dependent on the core hole depth T1. The setdimensions a, b, and c must therefore be maintained.
Type G l1 l2 l3 d1 d2 a b c D1 D2 D3 D4 T1 T2 WW O-ring Sealing ring
Pilot-operated check valves of the series CS provide freeflow in one direction (A to B).
The counter direction flow (B to A) is blocked. By apply-ing a pilot pressure, the poppet can be lifted from its seatagainst the pressure in port B. Thus flow in the counterdirection is made possible. There are 1 and 2 stage pop-pets available with pilot ratios of 1 : 5 and 1 : 40, to suitdifferent operating conditions.
Characteristics
Poppet 1 stage Poppet 2 stage
Pilot ratios
Portsize
M
Steelpoppet
Pilotratio
Manifoldmounting
Pilot-operated
checkvalve
S
Steelbody
Port size
3/8"
3/4"
CP
Code
600
1200
Seal
Surface ratio 5 : 1 (pilotspool-poppet surface) forquick response time with-out decompression.
Surface ratio 40 : 1 (pilotspool decompression pinsurface) for low shock oroscillation performancefrom decompression.
6 mounting screwsM6 for size 6006 mounting screwsM8 for size 1200
∆∆∆∆∆p/Q performance curves
The curves refer to hydraulic oil of 33 cSt and 50°C
Dimensions
6-29
CP.PM6.5 RH
Check Valve, pilot-operatedSeries CP
Catalogue HY11-2500/UK
6
Pilot-operated check valves of the series CP allow freeflow in one direction (A to B).
The counter flow direction (B to A) is blocked. By apply-ing the pilot pressure, the poppet can be lifted from itsseat against the pressure in port B. Thus flow in the coun-ter direction is also possible. There are 1 and 2 stagepoppets available with pilot ratios of 1 : 5 and 1 : 40, tosuit different operating conditions.
Characteristics
Portsize
M
Steelpoppet
Pilotratio
Threadedport
Checkvalve, pilot-
operated
S
Steelbody
CP
Seal
Ordering code
Threadtype
Thread
NPTF
Withw. pipethread
Code
omit
9
-
Poppet 1 stage
Pilot ratios
Surface ratio 5 : 1 (pilotspool-poppet surface) forquick response time with-out decompression.
Surface ratio 40 : 1 (pilotspool decompression pinsurface) for low shock oroscillation performancefrom decompression.
Size 600 1200
Max. working pressure [bar] 210 210
Max. pilot pressure [bar] 210 70
Flow Qmax at ∆p 2,7bar [l/min] 30 95
Nominal size 3/8 3/4
Weight [kg] 4 7
Technical data
Poppet 2 stage
Port size
3/8"
3/4"
Code
600
1200
Seal
NBR
FPM
Code
omit
V
Code Pilot ratio Stage
5 5 : 1 1
40 40 : 1 2
6-30
CP.PM6.5 RH
Check Valve, pilot-operatedSeries CP
Catalogue HY11-2500/UK
6
Size A a, B L3 B1 B2 H1 H L4 L7 H4 L L1 H2 H3 L6 L5 Ød W
The curves refer to hydraulic oil of 33 cSt and 50°C
Dimensions
6-31
RH.PM6.5 RH
Check Valve, hydraulic pilot-operatedSeries RH
Catalogue HY11-2500/UK
6
Characteristics
GeneralThe units belong to the group of shut-off valves as perDIN ISO 1219. Flow A to B blocked, in counter directionB to A open. The blocked flow polarity A to B can beenabled by hydraulic control.
Most common use:
• Blocking drain-free hydro-cylinder together with drainoil contacted flow control
• Return line discharge when oil flows appear that arelarger than the permitted flow for the directional valve,due to the surface ratio when positioning a double-acting hydro-cylinder.
• A hydraulically activated drain or circulation valve
The valves are available without and with hydraulic pre-discharging.
Code RH 1 2 3V 4V
Pressure pmax [bar] 700 700 500 500Flow approx. [l/min] 15 35 55 100Pilot flow volume [cm³] 0.15 0.22 0.4 1Pipe connections DIN ISO 228/1 A, B G 1/4 G 3/8 G 1/2 G 3/4Pipe connections DIN ISO 228/1 Z G 1/4 G 1/4 G 1/4 G 1/4Weight [kg] 0.4 0.4 0.6 1.3
Mounting freely suspended in the pipelineMounting position as desiredPressure fluid Hydraulic oil 10...68 mm²/s (ISO VG 10 to 68 as per DIN 51 519)Viscosity range approx. min. 4; max. 1500 mm²/s, opt. range 10...500 mm²/sTemperatures [°C] Oil and ambient: -40...+80; watch out for viscosity range!
Technical data
Without pre-dischargingThese valves have a ball as valve element, which quicklyenables the full flow cross-section proportionally duringpilot-operation. The valves are suitable for all normal op-erations. A metering position in the pilot port dampensthe control movement of the pilot spool so that pressureshocks (unloading shocks) are mostly suppressed. How-ever, if they appear during the trial run, then the neces-sary additional dampening can be achieved by using acoiled up pilot line to the throttling coil.
With pre-dischargingFor these valves with pre-discharging, a spherical pol-ished valve spool (seat valve function) is built-in insteadof a ball. The additional equipment of a check valveachieves a pre-opening providing a shock-free unload-ing of the medium. Such types of functioning valves areused primarily for high working pressures and large con-sumer volumes. The smaller, i.e., gentle, the openingspeed of the control spool, the more effective the pre-discharging, which is achieved here by a pilot line func-tioning as a throttle coil.
Connection forpilot line
Connection forpilot line
6-32
RH.PM6.5 RH
Check Valve, hydraulic pilot-operatedSeries RH
Catalogue HY11-2500/UK
6
Characteristics
Ordering code
RH
Check valve,hydraulic pilot-
operated
Flow Pre-discharging
Code
1
2
3
4
Flow [l/min]
15
35
55
100
Code
V*
omit
Pre-discharging
with
without
* only for sizes 3 and 4
Performance curves ∆∆∆∆∆p/Qvalid for flow polarity B to A and pilot-operated direction A to B
for keeping openpSt = pB + ∆p + kpB [bar] = pressure on side B∆p = flow resistance [bar] A to B as per∆p/Q performance curvek = 10 at RH 1 and RH 2
7 at RH 3 V8 at RH 4 V
Opening pressure B to A 0.2...0.3 bar;Oil viscosity during the measurement,60 mm²/s.For viscosities over approx. 500 mm²/s, a strong ∆p-increase is to be expectedfor smaller types (RH1...RH3).
Pilot pressure pSt for pilot-operation of the main valve(p
B = 0 bar)
Pilot pressure pSt for pilot-operation of pre-discharging
6-33
RH.PM6.5 RH
Check Valve, hydraulic pilot-operatedSeries RH
Catalogue HY11-2500/UK
6Type A, B Z L a b WW
RH 1 G 1/4 G 1/4 84 31.5 27 24
RH 2 G 3/8 G 1/4 90 32 28.5 27
RH 3 V G 1/2 G 1/4 100 36.5 31 32
RH 4 V G 3/4 G 1/4 126 45 35.5 41
* as per DIN 228/1, suitable for pipe connections with thread studs form B as per DIN 3852 page 2.
HydraulicsPressure medium Hydraulic oil as per DIN 51 524 ... 536Viscosity recommended [mm²/s] 30 ... 80
max. admiss. [mm²/s] 20 ... 380Pressure fluid temperature [°C] -20 ... +60Permissible contamination NAS 1638 class 9, to achieve with filter β10 x = 75Nominal pressure, max. [bar] 350
Nominal volume flow [l/min] 220 500 950 1400 2300
Pressure difference see flow curves
Poppet type C4, C8
Code Poppet type
4 C4
8 C81)
1) with damping nose
* at 3.5 bar ∆p without spring poppet C4; at 4.5 bar ∆p without spring poppet C8
NG b1 d1H7 d2H7 d3 d3max d4 d4 max* d5 max d6 d7H13 m1±0.2 m2±0.2 m3±0.2
16 65 32 25 16 18 16 25 4 M 8 4 46 25 23
25 85 45 34 25 25.5 25 32 6 M 12 6 58 33 29
32 102 60 45 32 36 32 40 8 M 16 6 70 41 35
40 125 75 55 40 43 40 50 10 M 20 6 85 50 42.5
50 140 90 68 50 56 50 63 10 M 20 8 100 58 50
* only with c4max and t4max
NG m4±0.2 t1+0.1 t2+0.1 t3 t4 t4 max* t15 t6 t7 t8 t10 U W
16 10.5 43 56 11 34 29.5 20 20 2 2 10 0.03 0.05
25 16 58 72 12 44 40.5 30 25 2.5 2.5 10 0.03 0.05
32 17 70 85 13 52 48.0 30 35 2.5 2.5 10 0.03 0.1
40 23 87 105 15 64 59.0 30 45 3 3 10 0.05 0.1
50 30 100 122 17 72 65.5 35 45 4 3 10 0.05 0.1
Mounting Dimensions
Dimensions
6-39
Accessories 6.PM6.5 RH
Catalogue HY11-2500/UK
6
Check ValvesAccessories
Description Threaded cable Body colour Figures Order No.joint Coding Switching
Plug DIN 43650, design type AF, protection class IP 65 PG 9 black, B Fig. 1 5001710Voltages up to 250 V grey, A 5001711
PG11 black, B Fig. 1 5001716*grey, A 5001717*
Plug with LED insert 24 V PG11 black, B Fig.1 and 5001571grey, A Fig. 3 5001572
Plug with LED insert 110 V PG11 black, B Fig.1 and 5001573grey, A Fig. 4 5001574
Plug with LED insert 220 V PG11 black, B Fig.1 and 5001575grey, A Fig. 4 5001576
Plug with LED insert 24V and PG11 black, B Fig.1 and 5001708suppressing circuitry grey, A Fig. 5 5001709
Plug with rectifier. Rectifier with 4 silicon diodes PG11 black, B Fig.1 and 5001737in bridge circuit Varistor n alternating current side to grey, A Fig. 6 5001738protect the diodes against power peaks.
Plug with pull relief and translucent PG11 black, B Fig. 2 5001723cover grey, A 5001724
Application with bridge rectifier suitable for 5001723 and — — Fig. 2 and 50017275001724 Fig. 7
Application with bridge rectifier and lamp suitable — — Fig. 2 and 5001734for 5001723 and 5001724 Fig. 8
* If not ordered otherwise specifically, valves with code P are supplied with these connectors.
