Style JQ Pressure Relief Device

Designed in collaboration with the Chlorine Institute, Inc. the Crosby JQ is designed with internal parts completely isolated from corrosive fluids and environments.

The Crosby Style JQ pressure relief device was designed to provide dependable overpressure protection for vessels used for the transportation and storage of chlorine and other dangerous commodities. It is ideally suited for such service, being completely sealed from hazardous fluids and corrosive environments until the time of an overpressure event. Diaphragm seals at both the inlet and outlet of the Crosby JQ effectively prevent the corrosion of internal working parts while also preventing the escape of fugitive emissions. These unique valves are in use worldwide on railroad tank cars, barges, and on stationary vessels, adding a measure of reliability and a level of safety beyond that possible with a conventional pressure relief valve.

The JQ is available in two inlet sizes, 1-1/2" and 4". The pressure limit for 1-1/2" size is 450 psi, and for the 4" size, 375 psi. The 1-1/2" device is equipped with a special Chlorine Institute-approved inlet flange and metal-to-metal seat. A 1-1/2" 300 lb ANSI raised face flange adapter is available as an option as is an elastomer O-ring seat for exceptional tightness. The 4" device has a standard 4" 300 lb ANSI large tongue-faced inlet flange and metal seat (a raised-face flange is available as an option).

Features & Benefits: