133 Series
8
Reassembly
Reassemble in reverse order of the above steps. When
reassembling, observe the following steps and cautions.
1. If the spring case was disassembled, reassemble
it rst. To ensure proper slack in the diaphragm
(key 15) and to facilitate reassembly of the trim
parts, tighten the casing cap screws and nuts
(keys 35 and 36) nger-tight only. Then adjust the
spring (key 12) to stroke the diaphragm assembly
fully. Final tightening of the casing cap screws and
nuts must be done alternately in equal increments
to ensure a proper seal without crushing
the diaphragm.
2. During reassembly, check all O-rings to be certain
they are in good condition; replace if necessary.
Lubricate the O-rings (keys 4, 19 and 32) with
elastomer sealant and lubricant. Apply anti-seize
compound liberally to the adjusting screw threads
(key 11), as indicated in Figures 10 to 12.
3. When installing the balancing diaphragm (key 22),
be certain the side marked PISTON SIDE is facing
the spring case. Carefully tuck the slack diaphragm
material into the space between the diaphragm
plate (key 21) and the lower casing (key 7) until the
diaphragm ts smoothly over the diaphragm plate
without wrinkles and the bead ts snugly and evenly
in the groove provided in the lower casing. This can
be done with a small screwdriver, but be careful not
to puncture the diaphragm (see Figure 6).
4. When replacing the cage (key 5), insert the set
screws (key 39) only far enough to retain the cage.
Do not tighten.
5. The registration disk (key 29) is marked for
proper placement; be certain it is positioned
correctly on the stem (key 18).
CAUTION
Always use the stem sleeve wrench
ats when loosening or tightening the
nuts (key 20 or 31) to prevent twisting
of the main and balancing diaphragms
(keys 15 and 22).
6. Be certain the Belleville spring washer (key 3) is in
good condition and is in place before placing the
actuator on the body (key 1).
Type 133HP
Disassembly
!
WARNING
To avoid personal injury, property
damage or equipment damage caused by
sudden release of pressure or explosion
of accumulated gas, do not attempt any
maintenance or disassembly without
rst isolating the regulator from system
pressure and relieving all internal
pressure from the equipment.
Do not loosen the diaphragm casing cap
screws (Figure 9, keys 35 and 36) when
the control spring (key 12) has spring
force applied to it. Release the spring
compression as described in step 6.
This section includes instructions for disassembly
and replacement of parts for the Type 133HP. All
key numbers refer to Figures 7, 8, 9 and 14, except
where indicated.
1. Disconnect the downstream control line from the
regulator and disconnect the remote vent pipe if
one is used.
2. Unscrew the four locknuts (key 34) and lift the
actuator portion off the body (key 1). All of the trim
parts will come out of the body with the actuator.
Inspect the valve disk (key 28), orice (key 2) and
restriction collar (key 46), if used.
CAUTION
Use care in performing step 3 to guard
against damage to the balancing
diaphragm (key 22).
3. Insert a 1/2 in. / 13 mm open-end wrench between
the legs of the cage (key 5) and place the wrench
on the stem sleeve wrench ats. Hold this wrench
while unscrewing the nut (key 31) to prevent stem
and stem sleeve (keys 18 and 25) rotation and
diaphragm (key 15) and balancing diaphragm
(key 22) damage due to twisting.
4. Remove the washer, registration disk and
valve disk (keys 30, 29 and 28). To remove the
restriction collar (key 46, Figure 13) (if used),
loosen the set screw (key 47, Figure 13) and
slip the E-ring (key 26, Figure 13) and collar off
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