AERCO CXT-E Retrofit Kit - Manual (Page 30)

ECS and CXT-E Retrofit Instructions Kit # 27004-TAB
Technical Instruction Document TID-0141_0A
12/30/2014 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 Page 30 of 76
3.1.2 Valve Reassembly Procedure
Reassembly is accomplished by basically reversing the previous Disassembly steps. Refer to
Figure 3-1 or 3-2 for the applicable Valve size. Perform the following steps in the order specified
and REPLACE the items shown in BOLD type with the new parts provided in the Retrofit Kit.
1. For 1 inch to 2 inch Valve sizes, refer to Figure 3-1 and reassemble or replace the following
items in the order specified:
(a) Valve Plug Shaft (5)
(b) Seat Retainer (34)
(c) Replace Disc Seat (7)
(d) Retaining Disc (8)
(e) Lower Shaft (16) and Valve Stem (12)
(f) Valve Stem Retaining Nut (35)
(g) Pilot Spring (10)
(h) Retaining Ring (3)
(i) Lock Washer (23)
(j) Proceed to step 3 and continue the Valve Reassembly process. Steps 3 through 6
apply to ALL valve sizes.
2. For 2 ½, 3 and 4 inch Valve sizes, refer to Figure 3-2 and reassemble or replace the
following items in the order specified:
(a) Top Piston (6) and Bottom Piston (3) Assemblies
(b) Replace Valve Seat (7)
(c) Lower Shaft (16) and Valve Stem (12)
(d) Valve Seat Retaining Disc (8)
(e) Socket Head Cap Screws (9)
(f) Pilot Spring (10)
(g) Pilot Spring Backup Washer (31), - 4 inch Valve Only
(h) Pilot Spring Retainer (11)
(i) Lock Washer (23)
(j) Proceed to step 3 and continue the Valve Reassembly process. Steps 3 through 6
apply to ALL valve sizes.
3. Replace Valve Top Gasket (13) and reassemble Valve Top (21) on Valve Body (1).
4. Secure Valve Top (21) to Valve Body (1) with the Bolts or Cap Screws (14).
5. Replace Packing Assembly (20) and reassemble Packing Nut (18) in Valve Top (21).
6. The last step of the Valve Reassembly procedure is to replace two Hex Nuts on the Valve
Shaft. Valve sizes from 1 to 3 inches contain two 1/4-20 Hex Nuts in the Retrofit Kit.
However, 4 inch Valves contain two 3/8-16 Hex Nuts in the Kit. Replace the appropriate Hex
nuts on the Valve Shaft.