Basic Documentation

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Globe Valve Close-off Pressures — MZ Series
Valve Size
Electronic
2-Way 3-Way
Normally Open
1/2", Cv ≤ 1.6 60 psi (414 kPa) 25 psi (172 kPa)
1/2", Cv ≤ 4 35 psi (241 kPa) 15 psi (103 kPa)
3/4 to 1", Cv ≤ 10 30 psi (207 kPa) 10 psi (69 kPa)
Normally Closed
1/2", Cv ≤ 1.6 70 psi (482 kPa) 70 psi (482 kPa)
1/2", Cv ≤ 4 40 psi (276 kPa) 40 psi (276 kPa)
3/4 to 1", Cv ≤ 10 30 psi (207 kPa) 30 psi (207 kPa)
Table Note:
For 3-Way valve close-offs, use this chart to determine
upper port (NC) and bottom port (NO).
Globe Valve Close-off Pressures — MT Series
2-Way
Valve Size
Pneumatic Electronic
599-01088
SQS SSC
3-8 psi 8-13 psi 10-15 psi
Normally Open
1/2", Cv ≤ 1.6 95 psi (655 kPa) 45 psi (310 kPa) 20 psi (138 kPa) 160 psi (1103 kPa) 120 psi (868 kPa)
1/2", Cv ≤ 4 45 psi (310 kPa) 25 psi (172 kPa) 15 psi (103 kPa) 85 psi (586 kPa) 65 psi (448 kPa)
3/4 to 1", Cv ≤ 10 35 psi (241 kPa) 10 psi (69 kPa) — 70 psi (482 kPa) 55 psi (379 kPa)
Normally Closed
1/2", Cv ≤ 1.6 40 psi (276 kPa) 95 psi (655 kPa) 95 psi (655 kPa) 95 psi (655 kPa) 95 psi (655 kPa)
1/2", Cv ≤ 4 28 psi (193 kPa) 50 psi (345 kPa) 50 psi (345 kPa) 50 psi (345 kPa) 50 psi (345 kPa)
3/4 to 1", Cv ≤ 10 18 psi (124 kPa) 40 psi (276 kPa) 40 psi (276 kPa) 40 psi (276 kPa) 40 psi (276 kPa)
3-Way
Valve Size
Pneumatic Electronic
599-01088
SQS SSC
3-8 psi 8-13 psi 10-15 psi
Normally Open
1/2", Cv ≤ 1.6 95 psi (655 kPa) 45 psi (310 kPa) 20 psi (138 kPa) 160 psi (1103 kPa) 95 psi (655 kPa)
1/2", Cv ≤ 4 45 psi (310 kPa) 25 psi (172 kPa) 15 psi (103 kPa) 85 psi (586 kPa) 50 psi (379 kPa)
3/4 to 1", Cv ≤ 10 35 psi (241 kPa) 10 psi (69 kPa) — 70 psi (482 kPa) 40 psi (276 kPa)
Normally Closed
1/2", Cv ≤ 1.6 40 psi (276 kPa) 95 psi (655 kPa) 120 psi (827 kPa) 95 psi (655 kPa) 95 psi (655 kPa)
1/2", Cv ≤ 4 28 psi (193 kPa) 50 psi (345 kPa) 65 psi (448 kPa) 50 psi (345 kPa) 50 psi (345 kPa)
3/4 to 1", Cv ≤ 10 18 psi (124 kPa) 40 psi (276 kPa) 50 psi (345 kPa) 40 psi (276 kPa) 40 psi (276 kPa)
Table Notes:
For 3-Way valve close-offs, use this chart to determine upper (NC) and bottom port (NO).
Normally open close-off pressures are at 20 psi actuator pressure.
Normally closed close-off pressures are at 0 psi actuator pressure.
Control Valve Sizing and Selection