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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 Altitude Controls
STEP 1
Pre-set pilots as noted:
Altitude Control – Adjust OUT, counterclockwise, backing pressure off the spring. This simulates a low tank setting which can be grad-
ually increased to the desired setting.
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, 1½ to 2½ turns from full closed position.
Reverse Flow Control – Adjust OUT, counterclockwise, backing pressure off the spring, preventing possible over-pressuring of the system.
Delayed Opening Control – Turn the adjustment screw OUT, counterclockwise, to allow for the drop in level prior to the valve open-
ing.
STEP 2
To ensure proper operation, any trapped air will need to be bled off
the valve cover during startup. The ACV includes a bleed valve, use
a flat head screwdriver to slowly open the valve (See Figure 1).
STEP 3
Pressure the line, by opening the upstream isolation valve slowly. Air
is vented through the air bleed valve. Tighten the fitting when liquid
begins to vent (See Figure 1).
Repeat the process until no air is trapped in the system.
IOM-ACV-127-3_6127-3 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# 1917067
C
FLOW
12
14
16
20
44
48
52
56
30
34
40
48
12
14
16
44
48
52
30
34
40
Figure 1
Position Indicator
© 2021 Watts
D
24
56
48
3
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