Type ACE97
15
Assembly
Before proceeding, read the following instructions.
Refer to the gures that pertain to your valve
(Figures 11 through 20) and review the list of approved
lubricants, sealants, and adhesives (in the Maintenance
section) when performing assembly operations.
1. Clean and inspect all parts.
2. Replace all O-rings, seals, gaskets, and any parts
that are worn or damaged.
3. Lightly lubricate all O-rings and metal parts in
moving contact.
4. Seal all pipe ttings.
Depad Pilot Valve Assembly
Refer to Figure 19.
1. Invert the rolling diaphragm (key 38) and place it
over the threaded portion of the follower (key 103).
2. Install the poppet (key 105) onto the threaded
portion of the follower (key 103) with the tapered
end against the rolling diaphragm (key 38).
3. Install the O-ring (key 104) onto the poppet (key 105).
4. Place this sub-assembly into the center cage
(key 108) from the end with internal threads.
5. Install the seal retainer and O-ring (keys 127
and 104) onto the follower (key 103).
6. Apply Loctite
®
#222 to the threads on the follower
(key 103). Thread the nut (key 31) onto the follower.
7. Insert a small drill bit into the cross-drilled hole on
the follower (key 103), turn, and tighten the nut
(key 31) and internal parts.
8. Install the return spring (key 101) onto the seal
retainer (key 127).
9. Place the gasket (key 102) into the cavity of the
upper cage (key 106) and thread the upper cage
onto the center cage (key 108).
10. Place the rain cap (key 109) onto the threaded
portion of the lower cage (key 110). The bead on
the rolling diaphragm (key 38) must be positioned
to engage the groove in the lower cage.
11. Thread the lower cage (key 110) onto the center
cage (key 108). Tighten all parts uniformly.
12. Lubricate the threads of the coupling (key 107)
with anti-seize. Thread the lower cage (key 110)
onto the coupling (key 107) one full turn.
Note
The locknut (key 99) must be in place
when attaching the lower cage (key 110)
and coupling (key 107) to the spring
case (key 120).
13. Thread the coupling (key 107) onto the spring
case (key 120) one full turn (while restraining the
coupling from turning against the lower cage
(key 110)). Turn the coupling (while restraining the
center cage (key 108)) and spring case.
Note
The coupling (key 107) is left-hand
threaded on the end with the knurled
(rough) nish. The opposite end is
right-hand threaded.
Pad Valve Cage Assembly (NPS 1/2
/ DN 15 valve)
Refer to Figures 8 and 13.
1. Place the rolling diaphragm (key 38) over the
threaded portion of the piston (key 37). Use
caution not to place the rolling diaphragm upside
down (refer to Figure 8). Apply Loctite
®
#222 to
the piston threads. Thread the poppet (key 42)
onto the piston. Use soft-jaws to hold the piston.
Insert a small drill bit into the cross-drilled holes on
the poppet to turn and tighten.
2. Install the O-ring (key 39) onto the poppet (key 42).
3. Lightly lubricate the piston (key 37).
4. Place the sub-assembly into the cage (key 52).
Pad Pilot Valve/Cage Assembly (NPS 1 and 2
/ DN 25 and 50 valves)
Refer to Figures 9, 14, and 15.
1. Install O-rings (key 16) into the bonnet (key 17).
2. Apply Loctite
®
#222 to the piston threads. Place
the rolling diaphragm (key 38) over the threaded
portion of the piston (key 37). Position the rolling
diaphragm bead as shown in Figure 9.
CAUTION
Do not place the rolling diaphragm
upside down.
(20 strony)
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