Vacuum Relief Valves
VR Series
Used in systems to maintain a desired vacuum level, these valves are proportional relief valves, not pop-type safety valves. They are not preset at the factory, but rather made in the field with the knurled adjustment screw, then locked in with the jam nut.
Construction: brass body, stainless steel springs
Poppets: VR25 uses stainless steel, VR38 and VR75 use nylon with Nitril seals, VR10 uses brass with fluorocarbon seal
Maximum Temperature: 250º F
NVR Series
For use as a vacuum breaker on low-pressure tanks, steam vessels and other vacuum equipment subject to damage for atmospheric pressure, the unique design can adjust for variations within the specified preset range. We can accommodate special requests for custom ranges and Teflon™ seats for tight shut-off.
3 Sizes: 2”, 2 1⁄2”, 3”
High Flow, Low Pressure Relief Application
Unique Seat Design Minimizes Leakage
Tested for set point and leakage
Materials:
Inlet, Piston, Spring Guide, Cap: Brass
Body: Cast Iron
Spring, Set Screws: Stainless Steel
