VP531A,C PNEUMATIC TERMINAL UNIT VALVES
SPECIFICATIONS
ACTUATOR
SPRING RANGE
psi (kPa)
Body Pressure Rating (maximum):
150 psi (1034 kPa).
2-5
3-10
VP531A,C CLOSE-OFF AT
MAXIMUM SYSTEM PRESSURE
Controlled Medium Temperature:
7
12
VP531A: 180°F (82°C) maximum.
(48)
(83)
23
28
(159)
(193)
25
30
VP531A
VP531C
(172)
(207) 0
20
40
60
80
100
120
140
(0)
(138) (276) (414) (552) (689) (827) (965)
DIFFERENTIAL PRESSURE CLOSE OFF RATINGS
psi (kPa)
C7715A
Fig. 5. VP531A,C close off ratings.
VP531C: 240°F (116°C) maximum.
Maximum Difference for Alternating Hot and Cold Water:
140°F (78K).
Maximum Safe Air Pressure:
30 psi (207 kPa).
9
14
(62)
(97)
CONTROL AIR PRESSURE psi (kPa)
11
16
(76)
(110)
13
18
(90)
(124)
15
20
(103)
(138)
Maximum Pressure Differential (for quiet service and
normal life of disc and seat):
17
22
(117) (152)
Water: 20 psi (138 kPa).
19
24
(131)
Steam (VP531C only): 10 psi (69 kPa).
(165)
21
26
(145)
(179)
Close Off Ratings:
See Fig. 5.
3
95-7251EF–1