Type ACE97
13
2. Unthread the lower cage (key 110).
3. Remove the rain cap (key 109).
4. Unthread the upper cage (key 106).
5. Remove the return spring (key 101).
6. Place a pin through the follower (key 103) and
unthread the nut (key 31). This will release the
internal components.
7. Remove all internal components, seals, and the
rolling diaphragm (key 38).
Actuator Disassembly
Refer to Figure 20.
1. Remove actuator case cap screws, lock washers,
and nuts (keys 93, 28, and 31).
2. Remove the upper actuator case (key 114).
3. Remove the spring (key 95). This may be one or
more springs and associated hardware, depending
on the actual spring range. See Figure 12.
4. Remove the actuator stem (key 94), diaphragm
bolt (key 117), upper diaphragm plate (key 119),
diaphragm (key 163), and lower diaphragm
plate (key 116).
5. Hold the actuator stem (key 94) with soft-jawed
pliers and unthread the diaphragm bolt (key 117).
6. Separate the upper diaphragm plate (key 119), lower
diaphragm plate (key 116), and diaphragm (key 163).
7. Remove the hex-head cap screws and lock
washers (keys 29 and 28) that attach the lower
actuator case (key 113) to the body (key 18) or
bonnet (key 17).
8. Remove the lower actuator case (key 113) and
gasket (key 27) from the valve body (key 18) or
bonnet (key 17).
Pad Valve Disassembly
For NPS 1/2 / DN 15 pad valve, no further disassembly
steps are required. Proceed to Pad Valve Cage
Disassembly for NPS 1/2 / DN 15 valve section.
For NPS 1 and 2 / DN 25 and 50 pad valves, perform
the following procedures for pad valve disassembly.
Refer to Figures 14 and 15.
1. For NPS 2 / DN 50 valve: Remove the cap screws
and lock washers (keys 50 and 51) that attach the
bonnet (key 17) to the body (key 18).
2. Lift the bonnet (key 17) from the body (key 18).
3. Remove the piston (key 25), main valve spring
(key 26), spring shim (key 34, if required), and spring
guide (key 49, if required) from the bonnet (key 17).
4. Unthread the screw (key 20) and remove from the
main valve, along with the lock washer (key 21).
Figure 8. NPS 1/2 / DN 15 Pad Valve Cage Assembly
W8181
CAGE
(KEY 52)
PISTON
(KEY 37)
O-RING
(KEY 39)
CROSS-DRILLED HOLE
POPPET (STEM)
(KEY 42)
ROLLING DIAPHRAGM
(KEY 38)
W8162
W8161
CAGE
(KEY 40)
PISTON
(KEY 37)
O-RING
(KEY 39)
CROSS-DRILLED HOLE
POPPET (STEM)
(KEY 42)
ROLLING DIAPHRAGM
(KEY 38)
W8162
Figure 9. NPS 1 and 2 / DN 25 and 50 Pad Valve
Cage Assembly
LOWER CAGE
(KEY 35)
(20 Seiten)
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