Series 5000 EPRV (8 - 12”) Installation, Operation and Maintenance Guide - Oct-2021
3
C2 REPLACING PRESSURE SEAL
TOOLS
»
1× 7/16 Box Wrench
»
2× 3/4 Box and/or Socket Wrench
»
1× Pliers
PARTS REQUIRED
»
1× Replacement Gasket
»
1× Hawkeye Severe Service Grease
1
If leaving the weight plates installed on the lever arm
make it too difficult to lift or maneuver, remove the
weight plates by removing the weight retention nut and
washer. Otherwise the seal can be replaced without
removing the weight plates by proceeding to step 4.
2
Remove the EPRV lever arm hinge pin with the pair of
pliers.
3
Remove the lever arm and pallet assembly and flip
over for access to the seal.
4
Remove the seal retention bolt, washer and plate with
the 7/16 box wrench.
5
Replace the old seal with the new seal.
6
Reinstall the seal retention plate washer and bolt.
Tighten the bolt until the seal retention plate contacts
the EPRV lid. Tighten snug.
7
Grease the seal face with Hawkeye Severe Service
Grease.
8
Reassemble the EPRV and return to service.
C3 TROUBLESHOOTING
PROBLEM: Vent is Leaking or Frequently
Opening
Symptom Of
Solution
Unlubricated
Pressure Seal
Perform the inspection and re-
lubrication procedures detailed
in C1.
Worn or Damaged
Pressure Seal
Set pressure set too
close to operating
pressure
Ensure that the set pressure
of the Series 5000 EPRV is
sufficiently above the operating
pressure of the tank.
PROBLEM: Vent is not opening
Symptom Of
Solution
Set pressure set too
far from operating
pressure
Ensure that the set pressure
of the Series 5000 EPRV is
sufficiently below the desired
relieving pressure and the
design pressure of the tank.
C4 BOLTING SEQUENCE
5
6
7
8
1
9
10
11
12
2
4
3
10 ANSI 150#
12 ANSI 150#
5
6
7
8
1
9
10
11
12
13
14
15
16
2
3
4
8 API 12B
