1. Shut down the backpressure regulator or relief valve.
2. Relieve the spring tension by loosening the jam
nut (key 17) and turning the adjusting screw
(key 15) counterclockwise. Remove cap screws
(key 16) and lift off the spring case (key 2), upper
spring seat (key 9) and relief valve spring (key 11).
3. Lift out the diaphragm unit which includes the
lock nut (key 31), lock washer (key 28), pusher
post (key 10), gasket (key 29), lower spring
seat (key 8), diaphragm (key 12) and valve plug
(key 4).
4.
Check the orifice (key 3) for wear or damage. If
it needs to be replaced, unscrew the valve plug
guide (key 7) and then the orifice. The valve plug
(key 4) can be removed by sliding it off of the
pusher post (key 10).
5. Place a small amount of sealant on the threads of
the orifice (key 3) and valve plug guide (key 7) and
reinstall these to the body (key 1).
6. To replace the valve plug O-ring (key 53), remove the
machine screw (key 24) and O-ring retainer (key 25)
from the plug. Remove and replace the O-ring.
7. Separate the remainder of the diaphragm unit
parts. Take the lock nut (key 31) off of the pusher
post (key 10). Slide off the lock washer (key 28),
lower spring seat (key 8), diaphragm (key 12),
washer (key 58) and gasket (key 29).
8. Slip the valve plug (key 4) onto the pusher post
(key 10). Place a gasket (key 29) on the shaft of
the pusher post over the threaded portion until
it rests on the base of the post. The printed side
should be facing upwards when installed. Place a
metal washer (key 58) on top of the gasket.
9. Slip the lower spring seat (key 8) and lock washer
(key 28) back onto the pusher post (key 10).
Lubricate the threads of the pusher post and
tighten the pusher post lock nut (key 31) until
the lock washer is flat and then turn the nut an
additional 1/8 to 1/4 turn. Return the diaphragm
(key 12), spring seat and pusher post assembly to
the body (key 1).
10. Set the relief valve spring (key 11) in the lower
spring seat and place the upper spring seat (key 9)
on the spring.
11. Put the spring case (key 2) over the spring
(key 11) and onto the body (key 1). Tighten the
cap screws (key 16) finger tight only.
12. To ensure proper slack in the diaphragm (key 12),
apply some spring compression by turning
the adjusting screw (key 15) clockwise. Finish
tightening the cap screws (key 16) with 10 to
13 ft-lbs / 13.56 to 17.63 N•m of torque.
Table 5.
Type 63EG Main Valve Body Part Numbers (Key 1)
BODY MATERIAL
END CONNECTION STYLE
PART NUMBER
NPS 2 / DN 50
NPS 3 / DN 80
NPS 4 / DN 100
NPS 6 / DN 150
NPS 8 x 6 /
DN 200 x 150
WCB Steel
NPT
38A8848X012
- - - - - - - - - - -
- - - - - - - - - - -
- - - - - - - - - - -
- - - - - - - - - - -
CL150 RF flanged
38A8853X012
38A8872X012
38A8867X012
38A7115X012
GE05973X012
CL300 RF flanged
38A8849X012
38A8871X012
38A8869X012
38A8873X012
GE05974X012
CL600 RF flanged
38A8844X012
38A8852X012
38A8866X012
38A8874X012
GE05975X012
PN 16/25/40 RF
GE05960X012
GE05965X012
GE05969X012
GE05972X012
Contact local Sales Office
WCB Steel (NACE)
NPT
38A8848X022
- - - - - - - - - - -
- - - - - - - - - - -
- - - - - - - - - - -
- - - - - - - - - - -
CL150 RF flanged
38A8853X052
38A8872X062
38A8867X032
38A7115X022
Contact local Sales Office
CL300 RF flanged
38A8849X022
38A8871X042
38A8869X022
38A8873X022
Contact local Sales Office
CL600 RF flanged
38A8844X022
38A8852X032
38A8866X022
38A8874X022
Contact local Sales Office
CF8M Stainless steel
NPT
38A8848X032
- - - - - - - - - - -
- - - - - - - - - - -
- - - - - - - - - - -
- - - - - - - - - - -
CL150 RF flanged
38A8853X072
38A8872X052
38A8867X042
38A7115X032
Contact local Sales Office
CL300 RF flanged
38A8849X032
38A8871X052
38A8869X032
38A8873X032
Contact local Sales Office
CL600 RF flanged
38A8844X032
38A8852X042
38A8866X032
38A8874X032
Contact local Sales Office
PN 16/25/40 RF
GE05960X022
GE05965X022
GE05969X022
GE05972X022
Contact local Sales Office
Table 6.
Type 63EG Main Valve Spring Part Numbers (Key 9)
BODY SIZE,
NPS / DN
SPRING RANGE
Standard
NACE
10 to 40 psig /
0.69 to 2.8 bar
30 to 125 psig /
2.1 to 8.6 bar
85 to 400 psig /
5.9 to 27.6 bar
10 to 40 psig /
0.69 to 2.8 bar
30 to 125 psig /
2.1 to 8.6 bar
85 to 400 psig /
5.9 to 27.6 bar
2 / 50
14A6768X012
14A6626X012
14A6628X012
16A5502X012
16A5501X012
16A5499X012
3 / 80
14A6771X012
14A6629X012
14A6631X012
16A5505X012
16A5503X012
16A5500X012
4 / 100
14A6770X012
14A6632X012
14A6634X012
16A5507X012
16A5506X012
16A5998X012
6 and 8 x 6 /
150 and 200 x 150
15A2253X012
14A9686X012
15A2615X012
16A5509X012
16A5510X012
16A6000X012
7
Type 63EG-98HM
