User's Manual

3083258
Service
Air Operated Regulator
Disassembly
1. Shut off the pump. Close the ball valve at the
regulator’s air inlet. Refer to Fig. 2, page 5.
2. Release all the air and fluid pressure in the
regulator and disconnect the air and fluid lines.
3. Remove the regulator from the system. Remove
the eight hex head screws (18) and nuts (19) from
the regulator cap (5) and the housing (20). See
Fig. 4.
4. Remove the o-ring (6*) from the regulator cap (5).
Remove the jam nut (9) and the washer (10) from
the diaphragm plate (13).
5. Remove the diaphragm (11*) and gasket (12*).
6. Remove the valve seat (14*) and the o-ring (15*)
from the regulator body.
CAUTION
Use special care when handling the hard carbide ball
(16*) and seat (14*) to avoid damage to them.
7. Remove the ball (16*) and the spring (17*).
8. Thoroughly clean and inspect all parts. Replace
any parts that appear to be worn or damaged.
Reassembly
1. Place the spring (17*) into the housing (20), then
the ball (16*) on top of the spring.
CAUTION
Use special care when tightening the seat (14*).
Tighten the seat by hand several turns before using
a wrench. Use care not to strip the plastic threads in
the housing (20).
2. Tighten the seat (14*) and the o-ring (15*) into the
housing. Torque to 37–43 in–lbs (4.1–4.8 N.m).
3. Assemble the following parts onto the diaphragm
plate (13). Place the gasket (12*) and diaphragm
(11*), with the blue PTFE side facing down, toward
the diaphragm plate (13). Place the washer (10),
with ridges facing the rubber side of the
diaphragm, onto the diaphragm plate (13). Secure
them with the jam nut (9). Torque the jam nut onto
the diaphragm plate to 28–32 ft–lb (38–43 N.m).
4. Install the assembled parts in the housing (20),
with the stem on the diaphragm plate (13) oriented
towards the seat (14*).
5. Apply thread sealant and tighten the air line fitting
(2) into the nut (4) in the cap (5). Torque to
140–160 in–lb (16–18 N.m).
6. Place the hex head screws (18) into the eight
holes in the cap (5) and install onto the housing
(20) with the nuts (19) located around the housing
holes. Torque the eight hex head screws in the
sequence shown on the Top View in Fig. 4.
NOTE: Numbers on the diagram indicate the
tightening sequence. Torque screws evenly to 60 in–lb
(6.8 N.m), three times, consecutively, to compensate
for diaphragm relaxation.