0781-1403 - Victor SR 4F-347 High Pressure Piston Regulator, Air, 50-750 PSIG

Victor SR 4F-347 High Pressure Air Regulator: Precision and Power

The Victor SR 4F-347 (0781-1403) is a premium heavy-duty high-pressure piston regulator designed specifically for demanding industrial applications involving air. Engineered by Victor, a leader in gas control equipment, this regulator is part of the SR 4 series, known for its robust construction and reliability in high-stress environments. Unlike standard diaphragm regulators, the SR 4F utilizes a brass piston actuation mechanism. This design choice is critical for high-pressure service, as it provides superior durability and resistance to the wear and tear associated with frequent pressure cycling and high inlet pressures.

With a maximum inlet pressure rating of 5500 PSIG, this regulator is built to handle high-capacity air cylinders equipped with CGA 347 connections. The unit delivers a versatile pressure range of 50 to 750 PSIG, making it an excellent choice for pressure vessel testing, dead-end testing, and other applications requiring substantial delivery pressure. The machined brass body and housing cap ensure structural integrity, while the cartridge-type seat assembly, featuring a PCTFE seat, offers excellent chemical resistance and longevity.

Operational smoothness is achieved through a Delrin cap bushing, which reduces friction during adjustment, allowing for precise pressure settings. Safety and maintenance are also prioritized; the regulator includes a sintered bronze inlet filter to prevent debris from entering the system and an external adjustable relief valve to protect downstream equipment. The outlet is equipped with a 1/4" Swagelok connection with a stainless steel tube fitting, ensuring a leak-tight seal for critical testing setups.