2.1 Before You Begin
After unpacking the unit, check the equipment for compliance and any damage that may have occurred during shipment.
Immediately contact a Welker representative if you received damaged equipment.
When sealing fittings with PTFE tape, refer to the proper sealing instructions for the brand used.
2.2 Setting and Installing the Relief: RV-1, RV-2, and RV-3
If installing and setting an RV-2CP, see
Section 2.3, Installing and Setting the Relief: RV-2CP
.
To accurately set the relief, a safe gas source, regulator, and pressure gauge are needed.
Setting the Relief Valve
1.
Connect the regulator to a safe gas source.
2.
Screw the spring adjuster of the relief valve clockwise to fully close the relief valve.
3.
Install the relief valve to the regulator.
4.
Set the regulator to the desired pressure, and then apply auxiliary gas through the regulator to the relief valve.
5.
Screw the spring adjuster of the relief valve counterclockwise until pressure starts to relieve. A hissing sound will be
audible.
For the RV-1 and RV-2, use a hex key to screw the spring adjuster.
For the RV-3, use a Phillips head screwdriver to screw the spring adjuster.
6.
Screw the spring adjuster of the relief valve clockwise until the hissing sound stops and the relief valve obtains a
positive shutoff.
Testing the Relief Valve
7.
Set the regulator to a pressure slightly below the relief valve set point, and then slowly increase the pressure of the
regulator until it is slightly higher than the relief valve set point. A hissing sound should be audible.
8.
Slowly decrease the pressure of the regulator until it is slightly below the relief valve set point. The hissing sound should
stop as the relief valve reseats.
9.
If the relief valve does not begin to relieve pressure or does not reseat, it may be necessary to repeat steps 4–6 to reset
the relief valve.
10.
If the relief valve is to be used with the regulator it was set with, reset the regulator to the desired point.
SECTION 2: INSTALLATION & OPERATION
7
IOM-033
MODELS: RV-1, RV-2, RV-2CP, and RV-3
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
