44
Control systems Control valves
Sizes, pipe connections and actuator combinations Valve type Pipe connections Valve action Type Actuator model
DN15 ½"
DN20 ¾"
DN25 1"
DN32 1¼"
DN40 1½"
DN50 2"
• •
• •
• • • • • • • • •
1 PF51G - 1NC
Normally Closed (flow over seat)
• •
• •
• •
NC
2
PF51G - 2NC
3 PF51G - 3NC
• •
• •
1 PF51G - 1NO
Normally Open (flow under seat)
Screwed to BSP or NPT
• •
• •
• •
NO
2
PF51G - 2NO
PF51G
3 PF51G - 3NO
• •
• •
Bi-Directional normally closed (flow over or flow under seat)
1 PF51G - 1BD
• •
• •
• •
2
PF51G - 2BD
BD
3 PF51G - 3BD
Technical details Leakage
PTFE soft seal
ASME Class VI
4.1 146
Flow characteristic
Fast opening
On/off
PF51G-NC PF51G-NO
Flow over seat
Port 1 to 2
Flow under seat
Port 2 to 1
Flow direction
Flow over seat
Port 1 to 2
PF51GG-BD
Flow under seat
Port 2 to 1
Pilot media
Air or water
60 °C maximum
Actuator rotation
360 °
Pilot connection
Maximum pilot pressure
Type 1 = 45 mm diameter Type 2 = 63 mm diameter Type 3 = 90 mm diameter
" BSP
10 bar g (145 psi g)
Actuator type and size
¼" BSP
10 bar g (145 psi g)
¼" BSP
8 bar g (116 psi g)
Kvs values Size
DN15 ½"
DN20 ¾"
DN25 1"
DN32 1¼"
DN40 1½"
DN50 2"
Kvs
4.5
8.0
15.6
24.6
42.0
57.0
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
TI-P373-14 CMGT Issue 7
Page 2 of 12
PF51G BronzePiston Actuated On/Off Valves
Powered by FlippingBook