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EPV Owner's Manual
Version 1.0, November 1998

CONTENTS

INSTALLATION
OPERATION
MAINTENANCE AND REPAIR
REBUILD KITS

EXPLODED DIAGRAM
ORDERING INFORMATION
TROUBLESHOOTING


INSTALLATION

Mechanical Connections

Connect the EPV to your pipes by screwing the pipes into the unit. If you use Teflon tape, make sure there are no loose pieces in the fluid stream. Use unions when possible for easy removal for maintenance or repair. Use hangers to support the weight of the unit and to eliminate stress on your pipes. The direction of fluid flow should match the arrows stamped on the side of the EPV valve body.

Electrical Connections

Wire Color

Function
White 4-20mA or 1-5VDC
Black 4-20mA or 1-5VDC return
Red 12 to 24 VDC power
Red/White Common

Move Jumper JP2 to top 2 pins to switch from 4-20 mA to 1-5 VDC control signal. This disconnects the 250 Ohm resistor.

NOTE: Connect Black and Red/White when using optically isolated 4-20 mA current sources, such as Allen-Bradley PLCs.

OPERATION

The EPV closes on power-up. If closed, the motor will stall. This is normal.

Jumpers control speed, number of turns, and 4-20mA / 1-5VDC modes. Store jumper on one pin of header for future use. Jumpers operate as follows.

Jumper Function
JP2 Move to top 2 pins to switch from 4-20mA to 1-5 VDC control signal.
2 Remove to engage noise filter.
3-6 See table below.

No. of turns Jumper 6 Jumper 5
1 ON ON
4 ON OFF
8 OFF ON
16 OFF OFF

*pulses per second

Speed* Jumper 4 Jumper 3
150 ON ON
100 ON OFF
75 OFF ON
60 OFF OFF

NOTE: Power must be off when changing jumpers.


MAINTENANCE AND REPAIR

Seat seal replacement

The seat seal and plunger are replaced as a unit called the plunger assembly. When replacing the plunger assembly, replace the stem seal O-rings. Rebuilding kits are available from HMC. The EPV must be disassembled to replace the seat seals.

Disconnect the EPV from the power supply. Remove the cover. Remove the 3/4-16 jam nut (1 1/8” wrench). Lift the motor and platform assembly off the valve. The coupling will separate.

Remove the bonnet-stem assembly. Hold the stem to keep it from rotating. Unscrew the plunger assembly from the stem. This is a left hand thread. Loosen the set screws holding the coupling to the stem. Slide stem out of bonnet. Thoroughly clean all parts. Discard stem o-ring.

Replace o-ring with new one. Lubricate o-ring and stem with silicone-based clear o-ring lubricant. Lubricate stem threads and outside of plunger with an anti-sieze lubricant compatible with your process fluid. Reassemble in reverse order of disassembly.

NOTE: Make sure seat seal is not seated when tightening bonnet!

LIMITED WARRANTY

Hass Manufacturing Company (HMC) warrants the Electronic Control Valve against defects in materials and workmanship for a period of Five (5) years from the date of original retail purchase. If you discover a defect, HMC will, at its option, repair, replace, or refund the purchase price of the product at no charge to you, provided you return it during the warranty period, transportation prepaid, to HMC. Prior to returning the product for warranty consideration, call Hass Manufacturing Company at (518) 674-8151 for a return authorization number and shipping instructions.

This warranty does not apply if the product has been damaged by accident, misuse, abuse or misapplication, has been modified, or if any serial number has been removed or defaced.

COPYRIGHTS AND PATENTS

This manual, computer programming, printed circuit board designs, and product design are copyrighted by Hass Manufacturing Company, with all rights reserved. A patent is currently pending.

FURTHER INFORMATION

Please contact us if you have any questions or comments regarding our products. You can view all of our product data sheets, as well as owner’s manuals, price lists and new product information at our web site, www.hassmfg.com.

REBUILD KITS

Product
Rebuild Kit Part Number
EPV250B 10842
EPV250SS 10854
EPV312B 10741
EPV312SS 10855
EPV375B 10841
EPV375SS 10856
EPV500B 10852
EPV500SS 10857

Figure 1. Rebuild Kits. Kits include: plunger assembly, stem, TFE washer, bonnet-body O-ring, bonnet-stem O-ring, bonnet-stem O-ring, and silicone O-ring lubricant.

EXPLODED DIAGRAM

Figure 2. EPV Exploded Diagram

ORDERING INFORMATION

Ref. Name Part Number
EPV250 EPV312 EPV375 EPV500
1161
Brass
1162
316SS
1163
Brass
1164
316SS
1165
Brass
1166
316SS
1167
Brass
1168
316SS
1 Motor 10978
2 Screw 10413
3 Coupling 10009
4 Nut 10011
5 Platform 10974
7 Bonnet 10568A 10568B 10568A 10568B 10559A 10559B 10559A 10559B
8 Bonnet-Body
O-ring
10014 EPR
10014N Neoprene
10323 EPR
10323N Neoprene
9 Stem O-ring 10015 EPR
10015N neoprene
10 TFE Stem Washer 10016 10324
11 Stem 10017C 10017B 10017C 10017B 10325C 10325B 10325C 10325B
12 Plunger Assembly 10093C 10093B 10625C 10625B 10326C 10326B 10462C 10462B
13 Plunger Guide 10385A 10385B 10385A 10385B 10386A 10386B 10520A 10520B
 14 Body 10383A 10383B 10523A 10523B 10384A 10384B 10591A 10591B

Figure 3. Part Number Reference Table.

 

TROUBLESHOOTING

 Symptom Cause What to do
Valve does not open and makes stuttering noise Valve was over tightened by hand Loosen by hand, close gently
Nothing happens at all Power cords not connected Check cables
Fuses blown Replace fuses
Power off Turn on
Valve does not shut off fluid flow tightly Obstruction between seat seal and seat Back flush valve or open valve and remove obstruction
  Worn out seat seal Replace seat seal
Process fluid leaks out of the weep hole in bonnet O-ring failure Replace O-ring
Valve does not follow control signal Noisy control signal Turn off noise filter (Jumper 2)
Valve does not follow control signal Optically isolated current source Connect Black and Red/White

Figure 4. Troubleshooting Table.

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Hass Manufacturing Company
371 NY Highway 351, Averill Park, New York 12018 U.S.A.
Tel (518) 674-8151  Fax (518) 674-8157