Compac C5000 Service Manual page 60

To install the new regulator valve seals:
- Install the new valve seal. Make sure that the larger flat side of the
seal faces upwards.
A
B
NOTE: O-rings that are subjected to natural gas at high pressure swell when
exposed to air. Once swollen, they cannot be reused and must be replaced.
CAUTION:
The Nitrile O-rings have a life span of over 10 years from cure date
but improper handling of these O-rings before use can shorten their useful life.
O-rings will deteriorate if exposed to ozone or ultraviolet light so keep in
original packaging and away from UV light. If unsure about their condition, do
not use old O-rings and order new ones.
- Lever off the two regulator O-rings and two Teflon back-up rings.
- Install two new regulator O-rings and two new Teflon back-up seals.
The back-up rings go on the outside of the O-rings.
NOTE: Always use O-ring lubricant on the O-rings to increase the service life.
- Reassemble the piston.
- Push the piston back up into the regulator body with a hex key.
NOTE: Keep the piston straight, rotate it clockwise to prevent the new O-ring
from catching or ripping.
- Screw in the bottom plug.
- Screw on the spring tube until tight.
Check the setting and sealing of the regulator for correct pressure.
Teflon Back-Up Ring
Regulator O-Ring
DETAIL A
Make sure that the
flat face of the seal
faces up
Regulator O-Ring
Teflon Back-Up Ring
DETAIL B
51.