AERCO Electronic Controls System (ECS) - Manual (Page 50)

Electronic Control System (ECS) and Type CXT-E Valve
9. RECOMMENDED SPARE PARTS
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AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 VD2: 02/28/14
OMM-0003_0D AC-105
15) If the Cage (2) must be removed from the Valve Body (1), it will be necessary to fabricate
a tool, such as shown in Figure 8-3 for Cage removal. Insert the tool into the slots on top
of the Cage (2) and turn the Cage out of the Valve Body. To obtain a Cage Removal tool,
contact AERCO or your nearest Sales Representative.
8.2.3 Valve Reassembly
Refer to Figure 8-1 or Figure 8-2 when performing the following procedures.
1) If the Seat Cage has been removed, place a NEW Seat Cage Gasket (24) on the seating
surface of the Valve Body. Next, replace the Seat Cage (2) into the Valve Body (1), using
the tool described in Step CM29. Make the Seat Cage tight.
2) If disassembled or being replaced, reassemble the Top Piston (6) and Bottom Piston (3)
onto the Valve Plug Shaft (5), using the Top Piston Retaining Nut (46) (1-inch through 2-
inch Valves), and Bottom Piston Retaining Nut (50) or Bottom Piston Retaining Ring (4).
3) For Control Valves, 1-inch through 2-inch, (Figure 8-1), reassemble the Valve
Plug/Seat/Shaft assembly in the following order:
a) Valve Plug (5)
b) Seat Retainer (34)
c) Valve Seat (7)
d) Retaining Disc (8)
e) Valve Stem (12) and Lower Shaft (16)
f) Valve Stem Retaining Nut (35)
g) Pilot Spring (10)
h) Pilot Spring Retaining Clip (3)
i) Lock Washer (23)
4) For Control Valves, 2.5-inch, 3-inch and 4-inch, (Figure 8-2), reassemble the
Piston/Seat/Shaft assembly in the following order:
a) Top Piston (6) and Bottom Piston (3) assembly
b) Valve Seat (7)
c) Valve Stem (12) and Lower Shaft (16)
d) Valve Seat Retaining Disc (8)
e) Cap Screws (9)
f) Pilot Spring (10)
g) Pilot Spring Back-Up Washer (31), 4-inch Valve only
h) Pilot Spring Retainer (11)
i) Lock Washer (23)
5) Holding the Lower Shaft (16), carefully replace the entire Shaft/Seat/Piston assembly into
the Valve Body (1) and Seat Cage (2).
6) Thoroughly clean the gasket surfaces of the Valve Body (1) and Valve Top (21) of all dirt
and scale. If necessary, use a wire brush, emery or both.
7) See Figure 8-1 or 8-2. Reassemble these parts in the following order:
a) NEW Valve Top Gasket (13)
b) Valve Top (21)
c) Cap Screws or Hex Hd. Bolts (14) – Valve sizes 2-1/2” to 4” use 1/2-13 Cap Screws;
Valve sizes 1” to 2” use 3/8-16 hex hd. Bolts. Tighten using an alternating pattern to