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Valve Servicing Dimensions
A
FLOW
The following tables detail the recommended minimum valve servicing dimensions.
Globe
Size (in)
1 1/4
1 1/2
A (in)
16
16
B (in)
10
10
Angle
Size (in)
1 1/4
1 1/2
C (in)
16
16
D (in)
10
10
Setting the Pressure Reducing Control
STEP 1
Pre-set pilots as noted:
Pressure Sustaining: Turn Sustaining Control adjustment screw OUT, counterclockwise, backing pressure off the spring, to allow it to
stay open while adjusting the other controls
Pressure Reducing – Adjust OUT, counterclockwise, backing pressure off the spring, preventing possible over-pressuring of the system.
Opening and Closing Speed – Turn the adjustment screws on the Closing Speed and Opening Speed Controls, if the main valve is so
equipped, OUT, counterclockwise, 11/2 to 21/2 turns from full closed position.
STEP 2
To ensure proper operation, any trapped air will need to be bled
off the valve cover during startup. If your ACV includes a bleed
valve, use a flat head screwdriver to slowly open the valve (See
Figure 1).
If your valve does not include a bleed valve, bleed air by loosen-
ing a fitting on the valve or a plug, at the highest point of the valve
assembly.
STEP 3
Pressure the line, by opening the upstream isolation valve slowly.
Air is vented through the air bleed valve or loosened fitting.
Tighten the fitting when liquid begins to vent (See Figure 1).
Repeat the process until no air is trapped in the system.
IOM-ACV-115-2_6115-2 2115
B
FLOW
2
21/2
3
4
20
22
22
24
12
14
14
16
2
2 1/2
3
4
20
22
22
24
12
14
14
16
FLOW
6
8
10
32
34
38
24
26
28
6
8
10
32
34
38
24
26
28
Counterclockwise to OPEN
bleed valve
EDP# 1917033
C
FLOW
12
14
16
44
48
52
30
34
40
12
14
16
44
48
52
30
34
40
Figure 1
Position Indicator
© 2021 Watts
D
20
24
56
56
48
48
3
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