Control systems Control valves
4
Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2025
TI-P373-14 CMGT Issue 7
PF51G Bronze Piston Actuated On/Off Valves
Description A 2-port pneumatically actuated on/off bronze valve for use on water, air, oil and gases. It can also be used on lower specification steam applications. A pneumatic signal acts on the actuator piston to open or close the valve with a spring return action. The valve plugs have a PTFE soft seal ( G ) to provide a tight shut-off. A valve position indicator is included on standard and flow regulator models. Valves are available with one of three sizes of actuator: Type 1 (45 mm), Type 2 (63 mm) and Type 3 (90 mm) with the following action options: - NC (Normally Closed) - These valves are designed for flow over the seat (port 1 to 2). Caution: Not recommended for waterhammer prevention. - NO (Normally Open) - These valves are designed for flow under the seat (port 2 to 1). Can be used to prevent waterhammer on valve closure in liquid applications. - BD (Bi-Directional normally closed) - These valves are designed for special applications that require flow in both directions and incorporates an anti-waterhammer design for liquid applications flowing under the seat (port 2 to 1). Note: To help prevent the possibility of waterhammer on liquid applications flowing over the seat (port 1 to 2) the pressure should not exceed 1 bar g (15 psi g).
4.1 145
Optional extras (see 'Valve selection guide') : - Travel switch - Flow regulator
TI-P373-14 CMGT Issue 7
Page 1 of 12
PF51G BronzePiston Actuated On/Off Valves
Powered by FlippingBook