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Type 92C
Replacing Diaphragm and Stem Assembly
1. For the pilot-operated regulator, unscrew the
elbow and connector (keys 25 and 24, Figure 10)
so that the loading tubing (key 22, Figure 10) can
be removed.
For the pressure-loaded regulator, unscrew
the loading tubing (customer supplied) from the
1/4 NPT connection in the regulator diaphragm
flange (key 2).
2. Remove the cap screws (key 12) and the diaphragm
flange (key 2).
Lift out the upper diaphragm gasket (key 9), the
diaphragms (key 8), the lower diaphragm gasket
and for Steel/Stainless Steel constructions, the
diaphragm ring (key 15) and another diaphragm
gasket (key 9).
3. Lift out the stem assembly (key 11) consisting of
the pusher plate and the stem. Check that the pitot
tube (key 10) is clear and free of obstructions.
Clean the parts. Check for wear, scratches, nicks
and other damage, and replace parts as necessary.
4. Install the stem assembly (key 11) in the stem
guide bushing (key 6). Place one diaphragm
gasket (key 9) in the regulator body (key 1).
For Steel/Stainless Steel constructions, place the
diaphragm ring (key 15) and another diaphragm
gasket (key 9) on top of the first gasket.
For all constructions, place the two molded
diaphragms (key 8) with the raised circle up,
another diaphragm gasket and the diaphragm
flange (key 2) on the body. Insert and tighten the
cap screws (key 12).
5. For the pilot-operated regulator, reconnect
the elbow, the loading tubing and the connector
(keys 25, 22 and 24, Figure 10).
For the pressure-loaded regulator, reconnect
the pressure-loading tubing.
6. When maintenance is completed, refer to the
Startup section to put the regulator back in
operation and to adjust the pressure setting.
Replacing Valve Plug and Orifice
1. Remove the valve plug guide (key 5).
2. Remove the valve plug (key 4) and the valve
plug spring (key 7). Inspect the valve plug
seating surface for nicks or scratches. Replace
as necessary.
Never-Seez
is a mark owned by Never-Seez Corp.
®
Lok-Cease
is mark owned by Certified Laboratories.
®
10
3. Unscrew the orifice (key 3), and inspect the
seating surface for nicks and scratches. Replace
if necessary.
4. Clean the valve plug guide, the valve plug, the
valve plug spring and the orifice (keys 5, 4, 7
and 3, respectively).
5. Coat the orifice threads with Never-Seez
equivalent lubricant. Then, being careful not to
damage the seating surface, thread the orifice
(key 3) into the regulator body (key 1).
6. Place the valve plug spring (key 7) into the
valve plug guide (key 5). Then slide the valve
plug (key 4) over the spring and into the valve
plug guide.
7. Apply Lok-Cease
20/20 sealant or equivalent
®
to the valve plug guide threads, and screw the
valve plug guide (key 5) with attached parts
into the regulator body (key 1), applying 130 to
160 ft-lbs / 176 to 217 N•m of torque.
8. When maintenance is completed, refer to the
Startup section to put the regulator back in
operation and to adjust the pressure setting.
Type 6392 Pilot
Perform this procedure if inspecting, cleaning or
replacing any pilot parts. Key numbers refer to Figure 9
unless otherwise specified.
All pilot maintenance may be performed with the pilot
body (key 1) attached to the pipe nipple and connector
(keys 23 and 24, Figure 10) unless the pilot body must
be removed or the pilot is to be replaced as a unit.
1. Loosen the jam nut (key 15), and turn the
adjusting screw (key 16) counterclockwise until all
compression is removed from the control spring
(key 13). Remove the loading tubing from the
pilot outlet connection. Remove the cap screws
(key 17), spring case (key 2), control spring
(key 13) and upper spring seat (key 14) from
the body.
2. Remove the lower spring seat (key 9), the diaphragm
(key 7) and the diaphragm gasket (key 8) from the
body. Lift out the stem assembly (key 6) consisting
of the stem and the pusher plate. Clean the
1/16 in. / 1.6 mm diameter pilot bleed hole. Clean
and replace parts as necessary, and assemble the
stem assembly, the gasket, the diaphragm and the
spring seat in the order shown in Figure 9.
or
®
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