Basic Documentation

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Valve Reference
Globe Valve Close-off Pressures — Pneumatic
Valve Size
in. (mm)
Spring Range
3 to 8 psi (21 to 55 kPa) 10 to 15 psi (69 to 103 kPa)
4" Actuator 8" Actuator 12" Actuator 4" Actuator 8" Actuator 12" Actuator
15 psi
(103 kPa)
15 psi
(103 kPa)
30 psi
(207 kPa)
15 psi
(103 kPa)
30 psi
(207 kPa)
0 psi
(0 kPa)
0 psi
(0 kPa)
0 psi
(0 kPa)
Normally Open Normally Closed
1/2 (15)
142 (979) 250 (1724) 250 (1724) — — 236 (1627) 250 (1724) —
3/4 (20)
80 (552) 231 (1593) 250 (1724) — — 155 (1069) 250 (1724) —
1 (25)
52 (359) 150 (1034) 250 (1724) 250 (1724) 250 (1724) 91 (627) 250 (1724) 250 (1724)
1-1/4 (32)
32 (221) 93 (641) 250 (1724) 250 (1724) 250 (1724) 52 (359) 148 (1020) 250 (1724)
1-1/2 (40)
20 (138) 60 (414) 198 (1365) 205 (1413) 250 (1724) 32 (331) 92 (634) 250 (1724)
2 (50)
12 (83) 37 (255) 123 (848) 130 (896) 250 (1724) 20 (138) 55 (379) 185 (1275)
2-1/2 (65)
— 31 (213) 100 (689) 95 (655) 250 (1724) — 36 (248) 114 (786)
3 (80)
— 20 (138) 66 (444) 63 (434) 200 (1378) — 23 (158) 74 (610)
4 (100)
— — — 40 (275) 129 (889) — — 46 (317)
5 (125)
— — — 26 (179) 82 (565) — — 29 (199)
6 (150)
— — — 18 (124) 57 (393) — — 20 (137)
Table Notes:
All values within table are in psi (kPa) unless otherwise indicated.
For 3-Way valve close-offs, use this chart to determine upper port (NC) and bottom port (NO).
Normally open close-off pressures are at 15 psi actuator pressure.
Normally closed close-off pressures are at 0 psi actuator pressure.
Globe Valve Close-off Pressures — Pneumatic High-Pressure
Valve Size
in. (mm)
Spring Range
3 to 8 psi (21 to 55 kPa) 10 to 15 psi (69 to 103 kPa)
8" Actuator 12" Actuator 8" Actuator 12" Actuator
Normally Open Normally Closed
2-1/2 (65)
200 (1378) — 200 (1378) —
3 (80)
200 (1378) — 200 (1378) —
4 (100)
— 200 (1378) — 200 (1378)
5 (125)
— 200 (1378) — 200 (1378)
6 (150)
— 200 (1378) — 200 (1378)
Table Notes:
All values within table are in psi (kPa) unless otherwise indicated.