Model "VR"
Vacuum Relief Valve

Model "VR" vacuum relief valves are used in systems to maintain a desired vacuum level. Please note that they are proportional relief valves and not "pop" type safety valves. Not preset at the factory, but easily adjusted with knurled adjustment screw and locked with jam nut.

Three sizes are offered: 1/4" NPT (VR25), 3/8" NPT (VR38), and 3/4" NPT (VR75).

All brass construction, with stainless steel springs. VR25 uses stainless steel ball as poppet, while VR38 and VR75 poppets are nylon with nitrile seals. Max. temperature 250° F.

Model "PR"
Pressure Relief Valve

Model "PR" pressure relief valves are used in systems to maintain a desired pressure level. Please note that they are proportional relief valves and not "pop" type safety valves. Not preset at the factory, but easily field adjusted with knurled adjustment screw and locked with jam nut.

Three sizes are offered, 1/4" NPT (PR25), 3/8" NPT (PR38), and 3/4" NPT (PR75).

All brass construction, with stainless springs. PR25 uses stainless steel ball as poppet, while PR38 and PR75 poppets are nylon with nitrile seals. Max. temperature 250° F.