VP512A Unit
Ventilator Valve
INSTALLATION INSTRUCTIONS
BEFORE INSTALLING
When installing the valve, allow space for the actuator
removal and service. See Fig. 1 and 2. Refer to Table 1.
Do not install upside down. Moisture, or dust and dirt,
might collect in underside of the actuator causing
damage and can impair valve operation.
It can be necessary, due to space limitations, to remove
the actuator before installing the valve body. Follow the
procedures shown in Fig. 3. Reverse this procedure to
replace the actuator.
Refer to form 77-2301 (General Engineering Data for
Pneumatic Control of Steam and Water Unit Ventilators)
for the location of the VP512A in individual unit
ventilators.
INSTALLATION
1.
Install the valve as shown in Fig. 1.
IMPORTANT:
The valve must be installed with the arrow on
the body pointing in the direction of the fluid
flow.
2.
If necessary, rotate the actuator for control air tub-
ing installation by loosening the two set screws
shown in Fig. 3.
3.
Tighten the set screws after the actuator is posi-
tioned.
CONTROL AIR LINE
FLUID FLOW
ARROW EMBOSSED
ON VALVE BODY
M18803
Fig. 1. Valve installation (straight-through
pattern shown).
Table 1. VP512A Approximate Dimensions in in. (mm).
Valve
Size
Body
Type
A
B
C
D
E
F
G
H
J
1/2
Straight 1-1/4 (32)
√
1-7/8 (48) 2-5/8 (67) 1-3/4 (44) √
1-13/16 (46) 4-11/32
(110)
√
Angle
1-1/4 (32)
2 (51)
√
2-5/8 (67) √
3/4 (19)
1-13/16 (46) √
1-3/4 (44)
3/4
Straight 1-1/4 (32)
√
2 (51)
2-1/8 (54) 1-3/4 (44) √
1-13/16 (46) 4-11/32
(110)
√
Angle
1-1/4 (32)
2-1/8 (54) √
2-1/8 (54) √
7/8 (22)
1-13/16 (46) √
1-3/4 (44)
1
Straight 1-3/8 (35)
√
2-1/4 (57) 3 (76)
1-5/8 (41) √
1-31/32 (50) 4-1/2 (114) √
Angle
1-3/8 (35)
2-1/8 (54) √
3 (76)
√
1-1/16 (27) 1-31/32 (50) √
1-29/32
(48)
1-1/4 Straight 1-9/16 (40) √
2-1/2 (64) 3-3/4 (95) 1-1/2 (38) √
2-9/16 (65) 4-13/16
(122)
√
Angle
1-9/16 (40) 2-1/8 (54) √
3-3/4 (95) √
1-3/16 (30) 2-9/16 (65) √
2-15/32
(63)
1-1/2 Straight 1-11/16 (43) √
2-7/8 (73) 4-1/4 (108) 1-3/8 (35) √
3-9/32 (83) 5-5/32 (131) √
Angle
1-11/16 (43) 2-1/8 (54) √
4-1/4 (108) √
1-3/8 (35)
3-9/32 (83) √
2-15/16
(75)
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