10
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
3.2 Maintenance: RV-1
Figure 5: RV-1 Maintenance Diagram
1.
Isolate and depressurize the RV-1 from the supply source.
2.
Remove the RV-1 from the supply.
3.
Using a hex key, remove the spring adjuster, spring, and ball.
4.
Inspect the spring. If the spring is in good condition, it can be reused.
5.
Inspect the ball for nicks and scratches. Replace as necessary.
6.
Unscrew the base from the spring housing, and then replace the O-ring on the base.
7.
Remove and replace the O-ring in the spring housing side of the base.
DO NOT lubricate the O-ring on which the ball seals (
Figure 5, #1
).
8.
Screw the base into the spring housing.
9.
Return the ball and spring to the spring housing.
The ball must rest on the O-ring. If the ball rests on the metal trim, the relief will not seat.
10.
Screw the spring adjuster into the spring body.
11.
The RV-1 is now ready to be reset and reinstalled. See
Section 2.2, Setting and Installing the Relief: RV-1, RV-2, and RV-3,
for instructions on setting and installing the relief.
