AERCO Electronic Controls System (ECS) - Manual (Page 48)

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
7) Measure and record the current position of the Hex Nuts (17) from the end of the Valve
Shaft (16). This will simplify adjustment of the Actuator Linkage during reassembly.
8) Next, completely remove the Hex Nuts (17) from the Valve Shaft (16).
9) Remove the Packing Nut (18) and the Packing Assembly (20) from the Valve Body.
CAUTION
Over-tightening the Packing Nut (18) may trap the Valve Stem
and slow or stop Valve motion.
10) Replace BOTH the Packing Nut (18) and the Packing Assembly (20) with a NEW Packing
Nut and Packing Assembly.
11) Replace the Hex Nuts (17) onto the Valve Shaft (25) and position them in the same
location noted in step CM7.
12) Attach the Actuator (27), Linkage (26) and Gasket (29) to the Valve Top using the two Cap
Screws (19) provided.
13) Install the Indicator Plate on the Valve Lower Shaft (16) and secure it in place with the
Linkage Adapter.
14) Reconnect the Linkage Adapter to the Linkage Shaft by replacing the Shaft Pin.
8.2.2 Valve Disassembly
Refer to Figure 8-1, or Figure 8-2 and proceed as follows:
1) Close the upstream and downstream shutoff valves before and after the Control Valve.
2) If the Control Valve is easily accessible for disassembly and reassembly, leave it installed
in the fluid line. If it is not easily accessible, remove the Valve from the line and clamp it in
a bench vise for easy accessibility.
3) Completely remove the Actuator (27) and Linkage Assembly (26) from the Valve Body as
described in steps CM1 through CM5.
4) Refer to Figure 8-1 or Figure 8-2. It is strongly recommended that disassembly of the
Valve be limited to only the steps necessary to restore the Valve to proper operation.
However, the following steps cover complete disassembly, if necessary. When performing
Valve disassembly, USE EXTREME CARE not to mar or scratch any surfaces. The
following steps assume that the Actuator and Linkage Assemblies have already been
removed from the Valve Body.
5) Remove the following parts in the order specified:
CAUTION
CAREFULLY remove the Packing Nut (18) and Cap Screws (14)
indicated below to relieve any trapped pressure.
• Hex Nuts (17)
• Packing Nut (18)
• Packing Assembly (20)
• Cap Screws (14)
6) Grasp the Lower Shaft (16) and carefully lift out the ENTIRE Shaft/Seat/Piston Assembly.
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