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VP525A,C PNEUMATIC RADIATOR VALVE
INSTALLATION
Actuator Spring Selection
Series 2 VP525C Valves are built with a orange (3-10 psi)
actuator spring. Shipped with the valve is a loose green
(2-5 psi) spring. If desired, you can replace the orange spring
with the green. To make this change, you must remove the
cover fastener (see Fig. 1).
Threaded Union Body Version
Typical applications of straight-through and angle pattern
union connected valves are shown in Fig. 4. The direction of
flow must be toward the union connected end (the same
direction as the arrow cast on the valve body).
Use proper piping methods when installing the threaded union
body to prevent distortion of the valve body (see Fig. 5).
The union tail piece, with the union nut in place, is attached to
the radiator with a suitable spud wrench. The valve body is
threaded into the supply piping then secured to the tail piece
by means of the union nut.
ACTUATOR
SPRING RANGE
PSI (kPa)
7
12
(48)
(83)
9
14
(62)
(97)
11
16
(76)
(110)
13
18
(90)
(124)
15
20
(103)
(138)
17
22
(117)
(152)
19
24
(131)
(165)
26
21
(179)
(145)
23
28
(159)
(193)
25
30
0
20
(172)
(207)
(0)
(138)
Fig. 2. VP525A close-off ratings.
95-5544EF–1
VP525A CLOSE-OFF
AT MAXIMUM SYSTEM PRESSURE
40
60
80
100
120
(276)
(414)
(552)
(689)
(827)
CLOSE OFF DIFFERENTIAL
PRESSURE RATINGS PSI (kPa)
ACTUATOR
SPRING RANGE
PSI (kPa)
9
(62)
11
(76)
13
(90)
15
(103)
17
(117)
19
(131)
21
(145)
23
(159)
25
(172)
STRAIGHT THROUGH
Fig. 4. Threaded union body connections.
140
(965)
C7713A
2
VP525C CLOSE-OFF
AT MAXIMUM SYSTEM PRESSURE
14
(97)
16
(110)
18
(124)
20
(138)
22
(152)
24
(165)
26
(179)
28
(193)
30
(207) 0
20
40
60
80
(0)
(138)
(276)
(414)
(552) (689)
CLOSE OFF DIFFERENTIAL
PRESSURE RATINGS PSI (kPa)
Fig. 3. VP525C close-off ratings.
100
120
140
(827) (965)
C7714A
ANGLE
M16448
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