Control systems Control valves
4
∆PMX - Maximum differential pressures for PF51G piston actuated valves PF51G-NC (Normally closed)
Pilot Pressure
Actuator diameter mm (in)
Maximum differential pressure bar (psi g)
Minimum bar (psi g)
Maximum bar (psi g)
Flow direction (port 1 to 2)
Model
Valve size
DN15 - ( ½ ")
over seat
45 (1.8)
16 (232)
1.8 (26)
PF51G-1NC
DN20 - ( ¾ ")
over seat
DN25 - (1")
over seat
DN15 - ( ½ ")
over seat
20 (290)
1.5 (22)
DN20 - ( ¾ ")
over seat
10 (145)
DN25 - (1")
over seat
63 (2.5)
PF51G-2NC
DN32 - (1 ¼ ") DN40 - (1 ½ ")
over seat
16 (232) 11 (160) 20 (290) 16 (232)
over seat
3 (44)
DN50 - (2")
over seat
1 (15)
DN25 - (1")
over seat
4.1 149
DN32 - (1 ¼ ")
over seat
90 (3.5)
8 (116)
PF51G-3NC
DN40 - (1 ½ ")
over seat
2.5 (36)
15 (218)
DN50 - (2")
over seat
PF51G-NO (Normally open)
Pilot Pressure
Actuator diameter mm (in)
Maximum differential pressure bar (psi g)
Minimum bar (psi g)
Maximum bar (psi g)
Flow direction (port 2 to 1)
Model
Valve size
DN15 - ( ½ ")
under seat
45 (1.8)
1.8 (26)
PF51G-1NO
DN20 - ( ¾ ")
under seat
DN25 - (1")
under seat
DN15 - ( ½ ")
under seat
16 (232)
DN20 - ( ¾ ")
under seat
10 (145)
DN25 - (1")
under seat
63 (2.5)
1.5 (22)
PF51G-2NO
DN32 - (1 ¼ ") DN40 - (1 ½ ")
under seat
under seat
12 (174)
DN50 - (2")
under seat
DN25 - (1")
under seat
DN32 - (1 ¼ ") DN40 - (1 ½ ")
under seat
90 (3.5)
16 (232)
1 (15)
8 (116)
PF51G-3NO
under seat
DN50 - (2")
under seat
Maximum differential pressures continued on next page
TI-P373-14 CMGT Issue 7
Page 5 of 12
PF51G BronzePiston Actuated On/Off Valves
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