Swagelok RHPS Series User manual

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RHPS Series
PRV 6
User Manual
Read the complete manual before installing and using the valve.

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WARNING
Certified as a PED (2014/68/EU) Category IV safety accessories as indicated by the
CE-mark.
CAUTION
Do not use the valve as a shutoff device.
Contents
Introduction ............................................................................................................................................... 3
Installation ................................................................................................................................................. 5
Operation ................................................................................................................................................... 6
Maintenance .............................................................................................................................................. 7
Troubleshooting ....................................................................................................................................... 8
WARNING
Before removing a valve from the system for service, you must
▪ depressurize system
▪ purge the system to remove any residual system media left in the valve

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Introduction
Representative drawing of the PRV6 (> S-04600)
1 = body
2 = spring housing
3 = poppet holder
6 = poppet
7 = seat
8 = seat ring
9 = seat housing
11 = spring guide
12 = adjustment screw
13 = anti tamper cap
14 = locking nut
15 = setspring
17 = (seat) O-ring
18 = O-ring
20 = O-ring

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Representative drawing of the PRV6 (< S-04600)
1 = body
2 = spring housing
3 = valve housing
6 = valve
7 = seat
8 = seat ring
11 = spring guide
12 = adjustment screw
15 = anti tamper cap
16 = locking nut
15 = setspring
17 = O-ring
18 = O-ring
19 = back-up ring
20 = O-ring

5
Installation
Relief valve loading spring ranges
Type number Pressure range
PRV6-02-0-N 10 to 40 bar (145 to 580 psig)
PRV6-02-1-N 40 to 80 bar (580 to 1160 psig)
PRV6-02-2-N 80 to 150 bar (1160 to 2175 psig)
PRV6-02-3-N 150 to 280 bar (2175 to 4060 psig)
PRV6-02-4-N 280 to 413 bar (4060 to 6000 psig)

6
Operation
WARNING
Do not exceed the specific pressure range for each valve.
Changing the set pressure
 Remove the wire lock seal.
 Remove the anti tamper cap.
 Unlock the lock nut on the set screw.
 Now the set screw can be turned.
 Turning the set screw clockwise increases the load and set pressure.
 Turning the set screw counter clockwise decreases the load and set pressure.

7
Maintenance
Annual maintenance is recommended under normal use.
More frequent maintenance may be required in heavy duty service.
Required tools for maintenance
 vise, to place the PRV in a secure and steady position
 wrench 13 mm
 wrench 17 mm
 wrench 20 mm
 wrench 32 mm
 pincers in various (small) sizes to take out the O-rings
 PRV cover socket (AST001191)
 PRV spring housing socket (AST001142)
 O-ring guide (AST001093)
Pressure venting
 If no other means of venting pressure is provided, it is possible to turn the adjustment screw counter
clockwise.
Disassembly precautions
 Do not try to unscrew the spring housing before taking out the set screw first.
Disassembly
 Break the wire-lock seal.
 Remove the anti-tamper cap cover.
 Unlock locking nut.
 Turn adjustment screw fully counter clockwise.
 Loosen the spring housing.
 Remove spring housing, set spring, spring guide (2x).
 Remove poppet holder.
 Remove seat.
Inspection of disassembled parts
With all parts taken out it is now possible to inspect the components for damage.
If there is any damage or significant wear the valve and seat must be replaced.
Besides the valve/seat combination there is also the poppet/poppet holder combination. Make sure
the valve is smoothly guided through the poppet holder guidance.
Assembly precautions
Follow the instructions for disassembly in reverse order to assemble the valve. Use system appropriate
lubricant.
Recommended torque for all threads
 Spring housing to body 100 N·m (885 in.·lb)
 Anti-tamper cap to spring housing 30 N·m (265 in.·lb)

Troubleshooting
Problem: The valve is relieving even though the inlet pressure is below the set point.
Cause: A damaged seat O-ring, valve or seat.
Solution: Replace for new seat O-ring, clean the valve and/or seat and check if it is closed. If not then
replace.
Problem: Leakage around the spring housing.
Cause: A damaged O-ring or insufficient torque on the spring housing.
Solution: Replace or tighten the spring housing.
Problem: The valve does not open, not even at pressures higher than maximum set pressure.
Cause: Valve is installed backwards or set spring is blocked.
Solution: Check the installed position of the PRV and the check set spring range. If the valve is installed
properly and the set spring range is adequate for the required set pressure, contact your
authorized Swagelok sales and service representative.
Warranty Information
Swagelok products are backed by The Swagelok Limited Lifetime Warranty.
For a copy, visit swagelok.com or contact your authorized Swagelok representative.
For additional information, see www.swagelok.com.
Swagelok, – Swagelok Company
© 2010–2020 Swagelok Company
October 2020, RevD
MS-CRD-0176
Caution: Do not mix or interchange parts
with those of other manufacturers.