
VGF FLANGED GLOBE VALVES
63-2618—01
10
Fig. 5. Close-off pressures with 7 in. RA Pneumatic Actuator.
Fig. 6. Close-off pressures with 8 in. D.A. pneumatic actuators.
M36642
SIZE 2-1/2 AND 3 IN. D.A. FLANGED BODIES
WITH 7 IN. R.A. PNEUMATIC ACTUATOR
(NORMALLY CLOSED)
0
(0)
30
(207)
50
(345)
20
(138)
40
(276)
60
(414)
CLOSEOFF PRESSURE RATINGS PSI (kPa)
10
(69)
5
(35)
15
(104)
25
(172)
35
(241)
45
(310)
55
(379)
USE 8-13 PSI (55-90 kPa) RANGE FOR DETERMINING CLOSEOFF OF VALVES
USED WITH MP953F ACTUATORS.
SIZE 2-1/2 INCH
SIZE 3 INCH
1
12
(83)
13
(90)
14
(96)
15
(103)
16
(110)
17
(117)
18
(124)
19
(131)
20
(138)
12
(83)
11
(76)
13
(90)
14
(96)
15
(103)
16
(110)
17
(117)
18
(124)
12
(83)
11
(76)
13
(90)
14
(96)
15
(103)
19
(131)
7
(48)
8
(55)
9
(62)
10
(69)
2-7
(15-50)
4-11 (30-75)
8-12 (55-85)
SPRING RANGE
PSI (kPa)
AIR PRESSURE IN ACTUA
TOR PSI (kPa)
1
2
(15)
1
(5)
0
(0)
L* U**
*L - LOWER SEAT
**U - UPPER SEAT
4
(30)
3
(20)
2
(15)
1
(5)
0
(0)
8
(55)
7
(50)
6
(40)
5
(35)
4
(30)
3
(20)
2
(15)
1
(5)
0
(0)
L* U** L* U**
12
(83)
13
(90)
14
(96)
15
(103)
16
(110)
17
(117)
18
(124)
19
(131)
20
(138)
21
(144)
22
(152)
23
(159)
24
(165)
25
(172)
12
(83)
11
(76)
13
(90)
14
(96)
15
(103)
16
(110)
17
(117)
18
(124)
12
(83)
11
(76)
13
(90)
14
(96)
15
(103)
16
(110)
17
(117)
18
(124)
19
(131)
20
(138)
21
(144)
22
(152)
23
(159)
24
(165)
25
(172)
19
(131)
20
(138)
21
(144)
22
(152)
23
(159)
24
(165)
25
(172)
7
(48)
8
(55)
9
(62)
10
(69)
0
(0)
10
(69)
20
(138)
30
(207)
40
(276)
60
(414)
70
(483)
50
(345)
80
(552)
90
(621)
100
(690)
110
(759)
120
(828)
130
(897)
140
(966)
150
(1035)
160
(1104)
2-7
(15-50)
4-11 (30-75)
8-12 (55-85)
SPRING RANGE
PSI (kPa)
SIZE 2-1/2 IN. AND 3 IN.
WITH 8 IN. D.A. PNEUMATIC ACTUATOR
(NORMALLY OPEN PORTS B TO AB)
AIR PRESSURE IN ACTUA
TOR PSI (kPa)
CLOSEOFF PRESSURE RATINGS PSI (kPa)
CLOSEOFF PRESSURE AT VARIOUS CONTROL AIR PRESSURES FOR VGF FLANGED VALVES AND MP953 PNEUMATIC ACTUATORS.
AIR PRESSURE REQUIRED TO OPERATE PRESSURE-BALANCED VGF FLANGED VALVES.
1
2
1
SIZE 2-1/2 INCH
SIZE 3 IN
CH
M36506
2
2
2
(15)
1
(5)
0
(0)
L* U**
*L - LOWER SEAT
**U - UPPER SEAT
4
(30)
3
(20)
2
(15)
1
(5)
0
(0)
8
(55)
7
(50)
6
(40)
5
(35)
4
(30)
3
(20)
2
(15)
1
(5)
0
(0)
L* U** L* U**