General Design Features - ihservice.comihservice.com/PDF's/Hedland Catalog.pdf · general design...

FAX 800-245-3569 2

OPERATING PRINCIPLEThe Hedland flow meter is a variable area instrument. A precisionmachined, sharp-edged Orifice ➀ located within the PistonAssembly ➁, forms an annular opening with the contoured MeteringCone ➂. The Piston Assembly carries a cylindrical PPS/CeramicMagnet ➃ that is magnetically coupled to an external Flow Indicator ➄ that moves precisely, in direct response to movement of the Piston. A calibrated Spring ➅ opposes flow in the forwarddirection. This spring decreases viscosity sensitivity and allows theflow meter to be used in any position, including inverted.

Bi-directional flow capability: If required, a reverse flow by-passoption is available and is depicted on individual product pages. Note that flow is measured in the forward direction only.

Operates in any position: The Hedland in-line flow meter’s uniquespring-loaded variable area design allows meters to be installed inany position without affecting accuracy. An optional inverted flowscale is also available.

Easier to read linear scale: This flow meter is the most readableproduct in its class. Brightly colored indicators move over thegraduated, linear Flow Scale ➆ which contains bold, easy-to-readnumerals and gauge marks. This enhanced resolution virtuallyeliminates parallax problems associated with competitive, directreading flow meters.

360° Rotatable guard/scale: Hedland’s unique design allows the meter to be installed in any orientation without regard to scaledirection. Once the meter is permanently installed, the guard/scalecan be rotated 360° to optimize readability.

Rugged construction: Flow meters are available in anodizedaluminum, brass, T303 and T316 stainless steel, with SAE, NPTF,BSPP, and Code 61 and Code 62 4-bolt flanged ports. This easy-to-read flow meter is a reliable and trouble-free flow rate indicator,monitoring a variety of liquids and gases (including aggressivechemicals), under a wide range of pressures, temperatures andrigorous conditions encountered in industrial applications.

No flow straighteners or special piping: The Hedland designdoes not require special plumbing or accessories to stabilizeturbulent flow. Flow meters can be installed immediately adjacent to 90-degree elbows or other components to provide greatestsystem design flexibility, while saving installation time and money.

Relatively insensitive to shock and vibration: This uniquedesign is inherently less sensitive to shock and vibration than other variable area flow meters. The new, improved coupling forces between the internal and external magnets greatly reduce the chance of decoupling the flow indicator under high flow andpressure transients. The magnetic coupling also eliminates the need for mechanical linkages that wear, loosen and leak over thefunctional life of competitive meters.

General Design Features

RELIABLE FLOW MEASUREMENT

TEL. 800-433-526363 GOOD VISCOSITY STABILITY

EZ-View® Flow MetersFor Oil, Water, Air & Compressed Gases

•1/2 to 1 inch ports•EZ to install, in any position•No special piping or flow

straighteners needed•No electrical connections• Direct reading indication• Accuracy within ±5% full scale•Relatively insensitive to shock

and vibration

SPECIFICATIONS:MATERIALS:Polysulfone plastic body, piston and coneT300-series stainless springBuna N flow indicator ring and pressure sealsC360 Brass, PVC, or T303 stainless fittingsPolypropylene limit indicatorsPH15 – 7MO stainless retaining ringOptional: Teflon® coated spring and retaining ring, consult factory.FITTINGS/ THREADS: NPT ANSI/ASME B1.20.1, BSPT ISOR7See Ordering Information Table, page 64TEMPERATURE RANGE: 32 °F to 250 °F (0 °C to 121 °C)PRESSURE RATING: Liquid: 325 psi / 22.4 bar maximumPRESSURE DROP: See Differential Pressure Charts, page 64ACCURACY: ±5% of full scaleREPEATABILITY: ±1%DIMENSIONS: See Ordering Information Table, page 64

Teflon is a registered trademark of E.I. duPont de Nemours & Co.

11

1

1

1 Meters with Type 1 PVC fittings:Pressure rating per normal PVC system specificationsTemperature range - 32 °F to 140 °F (0 °C to 60 °C)

ACCURATE OVER A WIDE VISCOSITY RANGE FAX 800-245-3569 64

EZ-View® Flow MetersFor Oil, Water, Air & Compressed Gases

OIL & WATER METERS

8.00

6.00

4.00

2.00

0.00.0 3 96 12 15 18 21 24 3027

PR

ES

SU

RE

DR

OP

(PS

ID)

FLOW (GPM)

10 GPM18 GPM

7 GPM

16 GPM

28 GPM

4 GPM

28 GPM16 GPM

18 GPM

10 GPM 7 GPM

4 GPM

AIR METERS

8.00

6.00

4.00

2.00

0.00.0 25 7550 100 125 150 175 200 250225

PR

ES

SU

RE

DR

OP

(PS

ID)

FLOW (SCFM)

70 SCFM170 SCFM

250 SCFM

150 SCFM

100 SCFM

45 SCFM45 SCFM45 SCFM

1/2" NPTF 1/2" NPTF 1/2" BSPT 3/4" NPTF 3/4" BSPT 3/4 or 1 inch 1" NPTF 1" nominal 1" NPTFFluid Flow Range female, female, female, male, male, nominal, male, socket weld male,

leviwsCVPcitsalptaews leviwsleviwsleviwsleviwsleviwsleviwsaideMbrass fitting T303 SS fitting brass fitting brass fitting brass fitting brass fitting polysulfone fitting PVC fitting

fitting0.5 – 4 GPM 2 – 15 LPM H624-104 H626-104 H627-104 H625-104 H630-104 H621-104 H628-104 H629-1041.0 – 7 GPM 4 – 26 LPM H624-107 H626-107 H627-107 H625-107 H630-107 H621-107 H628-107 H629-107

Oil 1.0 – 10 GPM 4 – 35 LPM H624-110 H626-110 H627-110 H625-110 H630-110 H621-110 H628-110 H629-1100.876 s.g. 1.0 – 16 GPM 5 – 60 LPM H624-116 H626-116 H627-116 H625-116 H630-116 H621-116 H628-116 H629-116

811-926H811-826H811-126H811-036H811-526HMPL 56– 51MPG 81– 0.3821-926H821-826H821-126H821-036H821-526HMPL 001– 02MPG 82– 0.4

0.5 – 4 GPM 2 – 15 LPM H624-004 H626-004 H627-004 H625-004 H630-004 H620-004 H621-004 H628-004 H629-0041.0 – 7 GPM 4 – 26 LPM H624-007 H626-007 H627-007 H625-007 H630-007 H620-007 H621-007 H628-007 H629-007

Water 1.0 – 10 GPM 4 – 35 LPM H624-010 H626-010 H627-010 H625-010 H630-010 H620-010 H621-010 H628-010 H629-0101.0 s.g. 1.0 – 16 GPM 5 – 60 LPM H624-016 H626-016 H627-016 H625-016 H630-016 H620-016 H621-016 H628-016 H629-016

810-926H810-826H810-126H810-026H810-036H810-526HMPL 56– 51MPG 81– 0.3820-926H820-826H820-126H820-026H820-036H820-526HMPL 001– 02MPG 82– 0.4

10 – 45 SCFM 5 – 20 LPS H624-204 H626-204 H627-204 H625-204 H630-204 H621-204 H629-20420 – 70 SCFM 10 – 30 LPS H624-207 H626-207 H627-207 H625-207 H630-207 H621-207 H629-207

Air 25 –100 SCFM 15 - 45 LPS H624-210 H626-210 H627-210 H625-210 H630-210 H621-210 H629-2101.0 s.g 30 –150 SCFM 20 – 70 LPS H624-216 H626-216 H627-216 H625-216 H630-216 H621-216 H629-216

812-926H812-126H812-036H812-526HSPL 08– 03MFCS 071– 55822-926H822-126H822-036H822-526HSPL 011– 53MFCS 052– 57

DIMENSIONS: Length in (mm) 7.75 (196.8) 7.75 (196.8) 7.75 (196.8) 8.25 (209.5) 8.25 (209.5) 7.75 (196.8) 5.25 (133.3) 8.46 (214.9) 8.86 (225.0)Fitting Flats in (mm) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (3.81) 1.50 (38.1) N/A 1.54 (39.1) 1.50 (38.1)

Weight lb (kg) 0.95 (0.43) 0.85 (0.39) 0.95 (0.43) 0.90 (0.41) 0.90 (0.41) 0.75 (0.34) 0.20 (0.09) 0.35 (0.16) 0.55 (0.25)

Ordering Information

Fits 3/4" copper tube types K, L, M; 1" copper tube type M only.DO NOT use pipe dope. Use Teflon® tape only. Use with plastic pipe fittings only.

Fits 1" Sch 40/80 PVC, CPVC pipe. Requires 1" pipe coupling.Length includes end fittings.

H624-204 H626-204 H627-204 H625-204 H630-204 H621-204 H629-204H624-207 H626-207 H627-207 H625-207 H630-207 H621-207 H629-207H624-210 H626-210 H627-210 H625-210 H630-210 H621-210 H629-210H624-216 H626-216 H627-216 H625-216 H630-216 H621-216 H629-216

812-926H812-126H812-036H812-526H822-926H822-126H822-036H822-526H

D I S C O N T I N U E D

Page 1

Installation Instructions ForEZ-View® Flow Meter and

EZ-View® Flow-Alert™ Flow Meter

I. INTRODUCTIONThe EZ-View series flow meter is a rugged, low-costdirect reading industrial class flow meter that is simpleto install. It can be mounted (installed) in any positionfrom vertical to horizontal without costly flow straighten-ers or other special plumbing. Constructed of highimpact polysulfone plastic, the EZ-View product lineoffers excellent structural integrity and chemical com-patibility with a wide range of industrial chemicals.

EZ-View flow meters provide instantaneous, direct-reading flow rate measurement of liquids in closedpiping systems. The transparent polysulfone plasticbody allows visual inspection of the fluid condition aswell as viewing of the internal flow indicator relative toa calibrated flow scale. See Figure 1.

EZ-View meters do not require electrical connectionsfor operation, and provide measurement by creating apredictable differential pressure across a sharp-edgedorifice that is located in the piston assembly.

II. OPERATING PRINCIPLEThe EZ-View series flow meter is a piston-type variablearea flow meter that uses a sharp-edged annular ori-fice, formed between an open-centered piston and atapered metering cone. The piston is held in a “no-flow”position at the base of the cone by a precision retentionspring. As flow in the pipe increases, the differentialpressure correspondingly increases across the pistonorifice, and moves the piston/flow indicator against thespring. The greater the flow rate, the further the pistonmoves along the tapered metering cone. The flow rateis measured by viewing the red indicator ring, mountedon the piston, relative to a graduated flow scale locatedon the transparent flow meter body (see Figure 2).

®DIVISION OF RACINE FEDERATED INC.

®

8635 Washington Avenue • Racine • Wisconsin 53406-3738 USATEL 800-HEDLAND • FAX 800-CHK-FLOW FORM # HLIT 300

CAUTIONThis product should be installed and serviced by tech-nically qualified personnel trained in maintainingindustrial class flow instrumentation and processingequipment.

CAUTIONRead instructions thoroughly before installing the unit. If you have any questions regarding product installa-tion or maintenance, call your local supplier for more information.

Figure 1. EZ-View Flow Meter

Figure 2. Flow Rate Indicator

The unique design allows the EZ-View meter to bemounted in any orientation—horizontal, vertical, upsidedown, etc. without sacrificing measurement perform-ance. Flow straighteners, located in the inlet and outlet,allow the flow meter to be less sensitive to turbulentflow conditions. Liquid measurements are provided inGPM (Gallons per Minute) and LPM (Liters per Minute).

®

EZ-View ® Flow Meter and EZ-View ® Flow-Alert™ Flow MeterInstallation & Maintenance Instructions

Page 2

III. SPECIFICATIONSAccuracy• ± 5% of full scaleRepeatability• ± 1%Pressure Rating • 325 PSI (22.4 bar) Maximum • Meters with Type 1 PVC fittings subject to

normal PVC system ratingsTemperature Range• 32 °F to 250 °F (0 °C to 121 °C)• 32 °F to 140 °F (0 °C to 60 °C) for meters with

Type 1 PVC fittingsPressure Drop• See Pressure Drop Charts on page 13.

Fittings/Threads• NPT ANSI/ASME B1.20.1• BSPT ISOR7• BSPP ISO228Materials (wetted):• Body Polysulfone

• Piston Polysulfone• Cone Polysulfone• Spring T300 Stainless Steel• Retaining Rings PH15-7MO Stainless Steel• Seals Buna-N• Indicator Ring Buna-N• Limit Indicators Polypropylene• Magnet Strontium Ferrite

(switching units only)• Fittings C360 Brass

PVCT303 Stainless Steel

Materials (non-wetted)• Limit Indicator Polypropylene• Scale PolyesterMaterial Compatibility• See Fluid Selection Chart on page 12.Calibration Fluid• Oil 0.871 specific gravity

32 cSt viscosity• Water 1.0 specific gravity

1.0 cSt viscosity

3.25 (82.5)BODY FLATS

LENGTH

3.50(88.9)DIA

325psi@70˚FMAX

22.4bar@21˚CMAX

380

300

200

10040

LPM

Dimensions

1/2", 3/4" & 1" SizesSize Material Connection Length Fitting Flats

& Type in. (mm) in. (mm)

1/2" NPTF Brass Female 7.75 1.50 & BSPT & SS (196.8) (38.1)

3/4" NPTF Brass Male 8.25 1.50 & BSPT (209.5) (38.1)3/4" & Brass Male 7.75 1.50

1" Sweat Brass Sweat (196.8) (38.1)1" NPTF Polysulfone Male 5.25 N/A

(133.3)1" Nominal PVC Socket 8.46 1.54

Weld (214.9) (39.1)1" NPTF PVC Male 8.86 1.50

(225.0) (38.1)

1-1/2" & 2" SizesSize Material Connection Length Fitting Flats

& Type in. (mm) in. (mm)

11/2" NPTF Brass Female 8.72 3.00 & BSPP (221.5) (76.2)2" NPTF Brass Female 8.72 3.00 & BSPP (221.5) (76.2)

2" Socket PVC Socket 11.48 N/AWeld Weld (291.6)

-- -- -- -- --

-- -- -- -- --

-- -- -- -- --

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Page 3

Installation RecommendationsThe flow meter is a simple device to install. However,the following measures are recommended for reli-able, trouble-free operation:Don't - Allow liquid pipe sealant to come into contactwith the plastic flow meter. Most pipe sealants con-tain solvents that are not compatible with polysulfoneplastic and will result in the flow meter body weaken-ing and potentially fracturing under pressure. If apipe sealant is required, use of Teflon® tape is recom-mended.Don't - Install the flow meter in piping systems thatare not aligned or properly supported.Don't - Connect the flow meter male plastic NPT fit-tings to female metal NPT couplings. Differences incoefficients of expansion between metals and plas-tics can cause the plastic flow meter body to crack.Utilize a female-to-female plastic pipe coupling toconnect metal pipe to the plastic flow meter.Don't - Use pipe wrenches on the flow meter body.To avoid scarring or otherwise damaging the externalsurface, use an open-end wrench on the integral hexflats during installation.Don't - Subject the flow meter to back pressure orback flow. The flow meter will operate as a “leaky”check valve when subjected to reverse flow, but canbe damaged if the reverse hydraulic horsepower istoo great.Don't - Install the flow meter on systems with largedegrees of particulate contamination. Minimum filtra-tion of 200 mesh (74 micron) is recommended fortrouble-free operation.Don't - Install O-ring seals that have not been lubri-cated.

Piping (Plumbing)

1. Piping should be properly aligned with the meterinlet and outlet to minimize structural stress on theplastic meter body. Special attention should begiven to this effort if higher operational pressuresand/or temperatures are anticipated. Piping shouldbe firmly supported by external mounting brackets,both upstream and downstream from the meter toavoid any pipe flexing that could reduce the life ofthe meter.

2. If the flow meter inlet or outlet are to be rigidlymounted, and the opposing port is to be connectedto a flexible hose, the end connected to the flexiblehose MUST be rigidly mounted.

3. This unique design does not require special plumb-ing or accessories to stabilize turbulent flow. Flowmeters can be installed immediately adjacent to90° elbows or other components, providing systemdesign flexibility.

4. A 200 mesh (74 micron) or better filtration isrequired to assure reliable performance.

Flow DirectionThese meters only accept flow in one direction. Makesure to align the Flow Arrow, located on the bottom ofthe meter’s flow scale, in the same direction as theanticipated line flow. (See Figure 3).

Mounting OrientationThe meter can be installed to operate in any position.

IV. INSTALLATION

This unit should be installed and serviced by technicallyqualified personnel trained in maintaining industrial classflow instrumentation and processing equipment.

CAUTION

To avoid unnecessary pipe flexing that could causestructural stress on the flow meter body, independentsupport located as near as possible to the inlet andoutlet of the meter should be used to isolate the meterfrom the piping system. Failure to provide this supportcould reduce the life of the meter.

CAUTION

2424 2020 1616 1212 88 44

9090 8080 6060 4040 2020

GPM

LPM

WAT

ER

Flow DirectionIndicator

Figure 3. Flow Direction Indicator

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Page 4

H621-XXX 1" NPT Models (See Figure 4)1. Apply a single layer of Teflon® tape to the male NPT

threads of the flow meter.2. Thread the flow meter inlet into a 1" NPT plastic,

female pipe coupling.3. Thread the flow meter and coupling onto the inlet

pipe and hand tighten. Make sure the flow directionarrow on the flow meter corresponds with the sys-tem flow direction (see Figure 3 on page 3).

4. Place an open-end wrench on the flow meter bodyhex and place a pipe wrench on the metal matingpipe. Tighten until snug. DO NOT overtighten. Makesure the flow meter scale is oriented for convenientviewing. DO NOT back off/unscrew fittings to rotatescale for better viewing.

Figure 4. Model H621-XXX 1" NPT Models Installation

5. Thread a 1" NPT plastic pipe coupling to the outletconnection of the flow meter. Stack a pipe nippleand half of a pipe union onto the pipe coupling.Tighten the assembly as required.

6. Install the other half of the pipe union to the outletpipe and connect the union halves together.

7. Piping should be supported and aligned properly toavoid placing stress on the flow meter body.

8. Slide the limit indicators to point to appropriatepositions on the flow meter scale. To remove thelimit indicators, slide them fully towards the flowmeter outlet.

H628-XXX 1" and H619-XXX 2" PVC withSocket Weld Models (See Figure 5)1. Remove the two end fittings from the flow meter.

Lubricate the O-rings and install the fittings onto theflow meter.

2. Prepare the flow meter PVC fittings and PVC pipecouplings with PVC cleaner/solvent.

3. Apply a thing layer of PVC glue to the PVC flowmeter fittings. Orient the meter during curing toensure that excessive glue will not run into the flowmeter internal components. Connect all PVC gluejoints by inserting the pipes fully into their matingcomponents and twisting 1/8 turn to guaranteeadhesion. Allow sufficient drying time.

Figure 5. Model H628-XXX 1" & H619-XXX 2" PVC Socket Weld Models Installation

4. Using the method outlined in steps 2 & 3, apply 1/2of the PVC union to the flow meter outlet fitting.

5. Install the other 1/2 PVC pipe union to the outletpipe.

6. Make sure the flow direction arrow on the flowmeter corresponds with the system flow direction(see Figure 3 on page 3). Lubricate the unionO-ring and connect the union together.



Note: To replace meter body order P.N. H622-XXX

Pipe Support

1" Coupling1" Union

PVC Pipe

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Page 5

H620-XXX Brass Sweat Fitting Models (See Figure 6)1. Remove both brass fittings from the flow meter inlet

and outlet. Remove O-rings from the fittings.2. Apply solder flux to the flow meter brass fittings and

mating pipe surfaces.3. Place the brass hex coupler onto the pipe with the

threads facing the flow meter. Slide the brass sweatfitting onto the prepared pipe.

4. Sweat the fitting onto the pipe. DO NOT apply heatto the brass flow meter fitting with the plastic flowmeter body or seals attached to the fitting.

5. Repeat steps 3 & 4 for the other flow meter fitting.Allow fittings to cool.

6. Lubricate the two O-rings removed in step 1. Placethe O-rings onto the brass fittings.

Figure 6. Model H620-XXX Brass Sweat Fitting Models Installation

7. Place the flow meter in between the two installedbrass fittings. Make sure the flow direction arrow onthe flow meter corresponds with the system flowdirection (see Figure 3 on page 3). Thread the twobrass hex couplers into the flow meter body.

8. Rotate the flow meter body so the scale can beconveniently viewed. Tighten the hex couplers.Typically, only hand tightening is required.




All Models with Male, Metal or PVC, Threaded, End Fittings (See Figure 7 on page 6)1. Remove both fittings from the flow meter inlet and

outlet. Remove O-rings from the fittings.2. Apply Teflon® tape to the male pipe thread connec-

tions.3. Place the brass or stainless steel hex coupler onto

the pipe with the threads facing the flow meter.4. Thread the flow meter fittings onto the mating pipe.5. Tighten fittings by placing an open-end wrench

onto the fitting and a pipe wrench onto the matingpipe.

6. Repeat steps 3-5 for the other flow meter fitting.7. Lubricate the two O-rings removed in step 1. Place

the O-rings onto the threaded fittings.

8. Place the flow meter between the two installed fit-tings. Make sure the flow direction arrow on theflow meter corresponds with the system flow direc-tion (see Figure 3 on page 3). Thread the two hexcouplers onto the flow meter body.

9. Rotate the flow meter body such that the scale canbe conveniently viewed. Tighten hex couplers.Typically, only hand tightening is required.




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Page 6

Figure 7. All Models w/Male, Metal, Threaded, End Fittings Installation

Pipe Support

Figure 8. All Models w/Female, Metal, Threaded, End Fittings Installation

Pipe SupportUnion

Metal Pipe

All Models with Female, Metal, Threaded, End Fittings (See Figure 8)1. Apply Teflon® tape to the male pipe thread connec-

tions.2. Thread the inlet of the flow meter onto the appropri-

ate pipe connection. Make sure the flow directionarrow on the flow meter corresponds with the sys-tem flow direction (see Figure 3 on page 3).

3. Tighten flow meter connection by placing an open-end wrench on the flow meter metal connectionadjacent to the pipe that is being attached. Tightenuntil snug. Make sure flow meter scale is orientedfor convenient viewing. DO NOT overtighten. DONOT back off/unscrew to rotate scale for betterviewing.

4. Install a union fitting at the outlet end of the flowmeter.




Do not tighten the flow meter by wrenching from theopposite fitting, as the meter body could crack.

CAUTION

V. FLOW-ALERT SWITCH OPTIONSNOTE: All Flow-Alert switches are magnetically trig-gered. It is not possible to add a switch to the basicmeter if it was not originally ordered with the switchingmagnet.

Flow-Alert Latching Limit SwitchThe AC and DC powered Flow-Alert modules consistof a relay circuit housed in a sealed plastic enclosure.The modules have a normally open, dry relay contactthat can be used to directly control alarms, warninglights, relays, or interface to a PLC. The relay will be

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Page 7

latched on as the magnet inside the flow meter pass-es by the module, and remain latched on until themagnet passes in the other direction, or power isinterrupted (see Figure 9). The setpoint is adjustablefrom 0-100% of full scale. Flow meters can beequipped with one latching limit switch, either AC orDC.

Flow-Alert Reed Limit SwitchThe reed switch Flow-Alert modules are available inthree forms: Form A (normally open), Form B (normal-ly closed), and Form C (single-pole, double throw).

Figure 9. Latching Switches Figure 10. Reed Switches

Switch Specifications

Specifications AC Latching DC Latching Specifications Reed Switch Reed Switch Reed SwitchForm-A (NO) Form-B (NC) Form-C (SPDT)

Operating Voltage 115 VAC ± 10% 10-30 VDC N/A N/A N/AOperating Current 25 mA maximum N/A N/A N/A

Contact Rating 1A @ 30 VDC Watts Max 15 5 50.5A @ 125 VAC Voltage Max 200 175 175Resistive Load Current Max 1A .25A .25A

Operating 32°-158°F (0°-70°C) 32°-250°F (0°-121°C)Temperature

Cable Not Included 3 ft, 24 AWG 3 ft, 20 AWG 3 ft, 24 AWGN/A 2 Conductor 2 Conductor 3 Conductor

PVC Jacket PVC Jacket PVC JacketCertification NA CE

Enclosure Rating NEMA 12 & 13 (IP65)

Reed switches are housed in a sealed plastic enclo-sure for environmental protection. The reed switchmodules do not provide a latching function like the ACand DC powered units. When the magnet inside theflow meter comes within proximity of the module, thereed switch will change state (see Figure 10). The set-point is adjustable from 0-100% of full scale. Two reedswitch Flow Alerts may be installed on a single flowmeter but one must be set for activation on increasingflow and the second must be set for activation ondecreasing flow.

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Page 8

Flow-Alert Latching Switch Installation,Operation and Adjustment1. Install one end of the vibration locking kit onto the

LPM side of the meters serrated rail as shown inFigure 11. Install the switch by placing the adjust-ment arms over the serrated rail from the inlet endof the 1/2", 3/4" and 1" meters, or the outlet end ofthe 11/2" or 2" meters. The direction of the connec-tor and cable assembly indicates whether theswitch will activate on increasing flow (connectorand cable pointing up), or on decreasing flow (con-nector and cable pointing down). See Figure 12.Secure the other end of the vibration locking kit andtighten after positioning.

2. The connector has four solder lugs labeled 1, 2, 3and 4. Soldering wires to the terminals first requiresdisassembly of the connector as shown in Figure13. The specific wiring pinouts for each style latch-ing switch are shown in Figure 14.NOTE: Before reassembly, it is recommended tolabel each wire with the corresponding lug position.

3. After securing wires to solder lugs, determinewhich direction the body of the connector shouldface. Before snapping the connector into place,refer to Figure 15.

4. After selecting direction A, B or C, snap connectorback together, pull the excess wire out of the strainrelief, then tighten the strain relief nut. Plug the con-nector into the switch module and secure with thescrew provided.

2020

4040

6060

8080

9090

LPM

1.

Only

use

Teflon

tape

tosealth

readed

fittin

gs.

DO

NO

Tuse

pip

edope

.2.

DO

NO

Tsw

eatfitadapto

rfittin

gs

into

asyste

mw

hile

mounte

dto

the

EZ-V

IEW

mete

r.

CA

UT

ION

!!

Switches Positioned for Activationon Increasing Flow

Switch Positioned for Activationon Decreasing Flow

Figure 12. Latching Switch Installation


Polarity Pin

Solder Lug

Strain Relief NutBody

Loosen Strain ReliefNut and Run (4)Wires In Here

Gasket


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Page 9

Flow-Alert Latching Switch AC Wiring Configurations

AC

Line

AC

Line

Switch ModuleContacts

FlowCircuit

2 4

1 3

Fuse

0.1 A

ACLoad 1

Figure 16. AC Conventional Connection

AC

Line

AC

Line


FlowCircuit

2 4

1 3

Fuse

0.1 A

AC Relay Contact

115 V Relay Coil

ACLoad 2

Figure 17. AC Conventional Secondary Connections

DC

Gro

und

10-3

0V

DC


FlowCircuit

2 4

DCLoad

1 3

Fuse

0.1 A

1

Figure 18. DC Conventional Connection

DC

Gro

und

10-3

0V

DC


FlowCircuit

2 4

1 3

Fuse

0.1 A

DC Relay Contact

DC Relay Coil

DCLoad 2

Figure 19. DC Conventional Secondary Connection

All wiring should be made in accordance with theNational Electrical Code and must conform to anyapplicable state and local codes.

WARNING

NOTE: Load must be within specified contact rating range.1A @ 30 VDC/500 mA @ 125 VAC.

Example shows a secondary (slave) relay with a 115 VAC coilintegrated with the AC switch module. This combinationallows switching of loads up to the rating of the relay contacts.NOTE: Load limited by relay contacts.

Example shows a secondary (slave) relay with a DC coil integratedwith the DC switch module. This combination allows switching ofloads up to the rating of the relay contacts.NOTE: Load limited by relay contacts.


Figure 15. Polarity Pin

DC Switch

Pin Function

1 Relay (NO)

2 DC+

3 Relay Common

4 DC-

AC Switch

Pin Function

1 Relay (NO)

2 AC Supply

3 Relay Common

4 AC Supply

C A

B Polarity Pin

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Page 10

Figure 21. Switch Orientation

WHITE(Common)

BLACK(Normally Closed)

RED(Normally Open)

FORM C

FORM A(Normally Open)

RED

BLACK

FORM B(Normally Closed)

WHITE

BLACK

Figure 20. Form A, B & C

If the flow meter and switch are to be installed in a crit-ical application, be sure the system is fail-safe. Theswitch should be wired so any switch failure will stopthe system. Failure to fail-safe the system may lead tosystem damage and/or personal injury.

WARNING FAIL-SAFE OPERATION

Flow-Alert Reed Switch Installation1. Install the switch on the flow meter by placing the

adjustment arm over the serrated rail from the inletend of the 1/2", 3/4", and 1" meters, or the outletend of the 11/2" and 2" meters. Each meter willaccept up to two reed switches and the switch(es)for 1/2", 3/4" and 1" meters must be installed beforethe meter is plumbed into the system.

2. Flow-Alert reed switches are available in threeconfigurations: Form A (normally open), Form B(normally closed), and Form C (SPDT). Wire colorcodes and switch configurations are shown inFigure 20.

Flow-Alert Reed Switch AdjustmentAfter the flow meter has been installed and the switchwired, the flow rate at which the switch will activatemust be adjusted as follows:

1. With fluid running through the meter, gently movethe switch adjustment tab(s) outward until theswitch body is free to slide up or down on theserrated rail. See Figure 21.

2. Move the switch into position until the switchactivates. See Figure 21.

3. Release the switch adjustment tab(s) to set theswitch position.

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Page 11

VI. MAINTENANCEEZ-View Flow Meters are designed to provide manyyears of service with little or no maintenance require-ments. Periodic cleaning may be required.

• Clean the outside of the flow meter with denaturedalcohol or mild detergent and warm water.

• Should the inside of the flow meter becomestained, it can be disassembled for cleaning.

• Should the flow meter become jammed with partic-ulate, the meter will require disassembly asdescribed below. The piston assembly should bepushed out from the inlet side to the outlet side.Clean the internal components and reassemble.

DisassemblyNOTE: Models with a 1" body-it is necessary to removethe spring retaining clip (located at the flow meter out-let port).

NOTE: Models with a 2" body can be serviced byremoving the two end fittings, then sliding the meteringpin out from the inlet, and removing the piston andspring from the outlet.

1. Measure the insertion depth of the retaining ringinto the flow meter body with a caliper or othermeasuring device.

2. Carefully remove the retaining clip with a small, flat-blade screwdriver.

3. Remove the spring and piston assembly.4. Clean the inside of the flow meter body and piston

assembly with denatured alcohol or mild detergentand water.

5. Reassemble the meter in reverse order of disas-sembly. Install the retaining ring to the depth meas-ured in step 1. Use a deep socket of approximate-ly 0.9" diameter and hand pressure to install theretaining ring.

VII. APPENDIXFluid CorrectionSTANDARD FLOW SCALES

Standard liquid flow scales are calibrated in GPM(Gallons per Minute) and LPM (Liters per Minute) at0.876 specific gravity for petroleum-based fluids, and1.0 specific gravity for water and water-based fluids.

For field conversion of the standard scale to otherfluids, see Density Effect below.

SPECIAL FLOW SCALES

Special scales are available for liquids in any measure-ment unit, and other fluid viscosities and/or specificgravities.

VISCOSITY EFFECT (SUS/CST)The design utilizes a sharp-edged orifice and biasingcalibration spring that ensures operating stability andaccuracy over the wide viscosity range common tomany fluids. Generally, high flow models of each metersize provide good accuracy over a viscosity range of 40to 500 SUS (4.2 to 108 cSt).

DENSITY EFFECT (SPECIFIC GRAVITY)Any fluid density change from stated standards has a proportional effect on meter accuracy. Special scalescan be supplied if actual specific gravity decreasesaccuracy beyond application limits. Corrections formore or less dense fluids can be made to standardscales using the following correction factor:

for water/water-based meters

for petroleum-based meters.

1.0

Specific Gravity

0.876

Specific Gravity

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Page 12

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Page 13

Pressure Drop Charts

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Page 14

NOTES

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Page 15

NOTES

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Form # HLIT300 © 2007 02/07 Printed in USA


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8635 Washington Avenue, Racine, WI 53406-3738 USATelephone 262.639.6770 or 800.HEDLANDFax 262.639.2267 or 800.CHK-FLOWwww.Hedland.com [email protected]

Materials & specifications are subject to change without notice.

Hedland and EZ-View are registered trademarks of Racine Federated Inc.Flow-Alert is a trademark of Racine Federated Inc.Teflon is a registered trademark of E.I. duPont de Nemours and Company

®


Flow-Alert™ Flow SwitchInstallation & Maintenance Instructions

Form # HLIT 290 © 2007 02/07

www

8635 Washington Avenue Racine, WI 53406-3738Telephone 262-639-6770 or 1-800-HEDLANDFax 262-639-2267 or 1-800-CHK-FLOW

.Hedland.com [email protected] & specifications are subject to change without notice.

LIMITED WARRANTY and DISCLAIMERHedland, Division of Racine Federated Inc. warrants to the end purchaser, for a period of one yearfrom the date of shipment from the factory, that all flow meters manufactured by it are free from defects in materials and workmanship. This warranty does not cover products that have been damaged due to misapplication, abuse, lack of maintenance, or improper installation. Hedland'sobligation under this warranty is limited to the repair or replacement of a defective product, at nocharge to the end purchaser, if the product is inspected by Hedland and found to be defective.Repair or replacement is at Hedland's discretion. A returned goods authorization number must beobtained from Hedland before any product may be returned for warranty repair or replacement.The product must be thoroughly cleaned and any process chemicals removed before it will beaccepted for return.

The purchaser must determine the applicability of the product for its desired use and assumes allrisks in connection therewith. Hedland assumes no responsibility or liability for any omissions orerrors in connection with the use of its products. Hedland will under no circumstances be liable forany incidental, consequential, contingent or special damages or loss to any person or property arisingout of the failure of any product, component or accessory.

All expressed or implied warranties, including the implied warranty of merchantability and theimplied warranty of fitness for a particular purpose or application are expressly disclaimedand shall not apply to any products sold or services rendered by Hedland.

The above warranty supersedes and is in lieu of all other warranties, either expressed or impliedand all other obligations or liabilities. No agent or representative has any authority to alter the termsof this warranty in any way.

.

Hedland is a registered trademark of Racine Federated Inc.Flow-Alert is a trademark of Racine Federated Inc.Teflon is a registered trademark of E.I. du Pont de Nemours and Company.Pyrex is a registered trademark of Corning Glass Works Corporation.Loctite is a registered trademark of Henkel Loctite Corporation.Brad Harrison is a registered trademark of Woodhead Industries, Inc.


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