Cashco PGR-1 - Manual (Page 10)

IOM-PGR-1 10
9. Bench test unit for suitable operation.
NOTE: Regulators are not tight shutoff de-
vices. Even if pressure builds up beyond set
point, a reg u la tor may or may not develop
bubble tight shutoff. In general, tighter
shutoff can be expected with composition
seat.
10. Pressurize with air and spray liquid leak
de tec tor to test around body cap (66) and
body (61) for leak age. Test pres sure should
be a mini mum of 100 psig (6.9 Barg) at the
inlet.
11. Remove body from vise, rotate down side
up and secure body in vise with body cap
down.
12. Reassemble diaphragm subassembly by
plac ing pusher plate seal (73) over thread ed
post of pusher plate (64), placing diaphragm
(72) and pressure plate (63) over the
threaded post. Assure the pressure plate
(63) is placed with curved outer rim down
next to the diaphragm (72) surface. Place
a thread sealant compound on the threads
of push er plate post (64). Apply 15 in-lbs.
torque to tighten the nut.
13. Place spring (75) over the pusher plate
nut (70) of the diaphragm subassembly.
14. Place multipurpose, high temperature
grease into de pres sion of spring button (65)
where ad just ing screw (68) makes contact.
(Also lubricate the threads of the adjusting
screw lightly).
15. Set spring but ton (65) onto range spring
(75); en sure spring button is laying fl at on
top of spring.
16. Rotate the spring chamber (62) CW by
hand into the threaded portion of the body
(61) ensuring not to cross thread. Continue
ro tat ing CW until fi rmly seated against the
upper di a phragm. Tighten to 30-35 ft-lbs
(41-47 N-m) torque value.
17. Rotate adjusting screw (68) CW into the
spring chamber (62) to where the nut (71)
comes in contact with the top of the spring
chamber. Stabilizer set pressure should
approach the set point prior to removal from
the piping installation.Retighten nut (71).
18. Pressurize with air and spray liquid leak
de tec tor to test around body and spring
cham ber for leakage. En sure that an outlet
pressure is main tained during this leak test
of at least mid-range spring level; i.e. 20-80
psig (1.4-5.5 Barg) range spring, 50 psig
(3.4 Barg) test pres sure min i mum.