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14 307212
Service
Service of the Spring Operated Regulators
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
1. Shut off the pump.
2. Close the ball valve at the regulator’s fluid inlet.
See Fig. 1.
3. Release all fluid pressure in the regulator and
disconnect the fluid line.
4. Remove the regulator from the system.
5. Remove the swivel union (23) and spring (40) from
the regulator body.
6. Remove the ball (20), valve seat (16), and gasket
(15). See Fig. 5.
CAUTION
Use special care when handling the hard carbide ball
(20) and seat (16) to avoid damaging them.
NOTE: Gasket (15) is thin and translucent. Be sure to
remove the gasket.
7. Remove the six cap screws (1) and housing (6).
8. Remove the cap (7), adjusting screw (12) and
spring (5).
9. Place diaphragm assembly in a vise, with jaws on
stem housing (18). Remove the stem retaining
screw (10), jam nut (13), and washer (17) from the
stem housing (18).
10. Remove the diaphragm (25) – on Models 217314
and 221118 only, diaphragm (22), and gasket (26).
11. Remove the spring (3), valve stem (9) and gasket
(21) from the stem housing.
12. Thoroughly clean and inspect all parts. Replace
any parts that appear to be worn or damaged.
13. Place stem housing (18) in a vise. One at a time,
place the gasket (26), diaphragm (22) – white
PTFE side down toward bottom housing, dia-
phragm (25) – on Models 217314 and 221118 only,
and washer (17) on the stem housing (18). Secure
them with the jam nut (13).
NOTE: On Models 217314 and 221118, align the
holes on the diaphragms (25 & 22) before tightening
the jam nut (13).
14. Torque the jam nut (13) onto the stem housing (18)
to 21–35 ft-lb (28–47 NSm).
15. Install the valve stem (9), spring (3), gasket (21)
and retaining screw (10) in the stem housing (18).
Make sure the tab on the valve stem (9) fits into
the slot on screw (10).
16. Torque the retaining screw (10) into the housing to
21–25 ft-lb (28–34 NSm).
17. Install the spring, adjusting screw (12) and cap on
the housing (6). Tighten six capscrews (1) in the
sequence shown in Fig. 5, Bottom View, and to
the torque noted.
18. Install the gasket (15), valve seat (16), and ball
(20) into the housing (6).
NOTE: Seat may be turned upside down and reused.
19. Screw the swivel union (23), with the o-ring (4)
attached and the spring (40) in place, into the inlet.
Torque to 23–27 ft-lb (31–36 NSm).