Upstream vs downstream pressure is balanced via communication of the process fluid above and below the balancing diaphragm or piston in order to eliminate opening/closing forces due to pressure differential. Designed for liquid systems, and available in either pressure-opening (normally closed) or pressure-closing (normally open) configurations.

Specifications

• Connection Size: 4 "
• Connection Type: 150 RF
• Body Style: Through Body
• Body Material: Cast Ductile
• Option Available for NACE MR0175 compliance or certification.
• Trim Size: 3 "
• Trim Type: Linear (Nominal)
• Seal Class: Class VI
• Process Fluid: Liquid and Gas
• Max. Working Pressure: 250 psig
• Actuator Spring Nominal Pressure: 35 psig
• Actuator Crack Open Pressure: 10 psig
• Actuator Full Open Pressure: 35 psig
• Max. Supply Gas Pressure: 45 psig
• Valve Fail Position: Closed
• Operation: Pneumatic
• Catalog Page: E3:10.3
• Face-to-Face Length: 15 "
• Repair Kit P/N: RFW