Emerson Fisher 627 Series - Page 13

14. To remove the diaphragm (key 23), remove the
diaphragm connector nut (key 22) and lift off the
diaphragm head (key 24) and diaphragm (key 23) from
the connector assembly (key 21). Do not attempt to
disassemble the connector assembly (key 21).
15. Position the replacement diaphragm (key 23)on the
connector assembly (key 21), install the diaphragm
head (key 24) and connector nut (key 22), then torque
to 17 ft-lbs / 23 N•m.
16. If necessary, replace the guide retainer O-ring (key 48)
and, set the guide retainer (key 26) aside, ready
for assembly.
17. On the pusher post (key 19) install the relief seal O-ring
(key 28) and apply lubricant. Also, install the relief
seal retainer (key 47), diaphragm connector assembly
(key 21, with attached parts) relief spring (key 27), upper
relief spring seat (key 33) and guide retainer (key 26).
Torque the guide retainer (key 26) to 3 ft-lbs / 4.1 N•m.
18. Hook the pusher post (key 19) (with attached parts) on
the lever (key 15) to check the alignment of the holes in
the diaphragm with the holes in the spring casing. If the
holes do not line up, unhook the pusher post from the
lever, hold the pusher post and rotate the diaphragm to
the correct position.
19. Install the lower spring seat (key 31) over the relief
spring so it rests flat on the connector nut (key 22).
20. Insert the diaphragm assembly into the diaphragm
casing (key 5) and hook the pusher post on the lever
(key 15).
21. Install the control spring (key 32) and upper spring seat
(key 33) and apply lubricant to the upper spring seat
(key 33).
22. Install the spring case (key 29) so that the screened
vent assembly (key 30) is in the correct position for
the application. Place the nameplates over the screw
holes, insert the spring case cap screws (key 37) and
finger tighten.
23. Screw in the adjusting screw (key 35) to put slack into
the diaphragm (key 23).
RELIEF VALVE
O-RING (KEY 28)
PUSHER POST
(KEY 19)
DIAPHRAGM
HEAD (KEY 24)
DIAPHRAGM
(KEY 23)
DIAPHRAGM CONNECTOR
NUT (KEY 22)
RELIEF VALVE
SPRING (KEY 27)
GUIDE RETAINER
O-RING (KEY 48)
RELIEF SEAL
RETAINER (KEY 47)
DIAPHRAGM CONNECTOR
ASSEMBLY (KEY 21)
LOWER SPRING
SEAT (KEY 31)
RELIEF SPRING
SEAT (KEY 25)
GUIDE RETAINER
(KEY 26)
W4668
PUSHER POST
(KEY 19)
DIAPHRAGM
(KEY 23)
PUSHER POST
O-RING (KEY 52)
DIAPHRAGM
HEAD (KEY 24)
DIAPHRAGM LIMITER
O-RING (KEY 51)
DIAPHRAGM
LIMITER (KEY 50)
DIAPHRAGM
HEAD CAP
SCREW (KEY 46)
W5433-1
TYPE 627, 627R, 627LR, 627M OR 627MR
TYPES 627H AND 627HM
Figure 6. Diaphragm Assemblies
13
627 Series