MAINTENANCE
IOM-089
Page 11 of 13
Manual Insertion Probe Instrument Regulator
Rev: B
Last updated:
9/8/2009
3.3 Relief Valve (RV-1) Maintenance
(
See Figure 4
)
1.
Isolate and depressurize the relief valve from the supply source.
2.
Remove the relief valve from the supply.
3.
Remove the spring adjuster, spring and ball.
4.
If the spring is in good condition, it can be reused.
5.
Check the ball for nicks and scratches and replace if necessary.
6.
Unscrew the base from the spring housing and replace the seal (See Figure 5).
7.
Screw the base and spring housing back together.
8.
Drop the ball and spring into the spring housing.
The ball must rest on the seal. If the ball rests on the
metal trim, then the relief will not seat.
9.
Replace the spring adjuster.
10.
The relief valve is ready to reinstall and reset.
11.
Proceed to Section 3.4 for probe maintenance
instructions
Figure 4
Relief Valve (RV-1D)
Figure 5
Seal
