0781-1473 - Victor SR4K-677 High Pressure Inert Gas Piston Regulator

Victor SR4K-677 High Pressure Inert Gas Regulator Overview

The Victor SR4K-677 (0781-1473) is a premium heavy-duty high-pressure regulator designed specifically for inert gas applications requiring substantial delivery pressures. Part of the renowned SR 4 series, this regulator is engineered to handle the rigorous demands of industrial testing environments, including pressure vessel and dead-end testing. Unlike standard regulators that utilize diaphragms, the SR4K-677 features a robust brass piston actuation mechanism. This design choice significantly enhances durability and reliability when operating at high pressures, reducing the risk of component failure under stress.

Constructed with a machined brass body and housing cap, the SR4K-677 is built to withstand harsh industrial conditions. It boasts an impressive maximum inlet pressure rating of 7500 PSIG, making it suitable for high-pressure supply cylinders and manifolds. The delivery pressure range is equally impressive, offering precise control from 300 up to 4500 PSIG. This wide range allows operators to utilize a single regulator for various testing protocols that require different pressure levels. The unit is equipped with 2.5-inch brass gauges that provide clear and accurate readings of both cylinder and delivery pressures.

Internal components are selected for longevity and performance. The regulator utilizes a cartridge-type seat assembly with a PCTFE seat, known for its high mechanical strength and resistance to deformation under load. A sintered bronze inlet filter is integrated to prevent debris from entering the regulator, ensuring clean operation and extending the service life of the seat and piston. For ease of use, the regulator includes a Delrin cap bushing, which facilitates smooth adjustments even at high torque settings. The inlet connection is a standard CGA 677, specifically designated for high-pressure inert gas connections, while the outlet features a 1/4-inch Swagelok connection with a stainless steel tube fitting, ensuring a leak-tight seal for critical applications.