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.