Protecting processes from excessive pressure is not only prudent and ensures longer equipment life; but in many places it is becoming mandated for personnel and environmental protection. NIKKISO HydroGarD^™ valves exceed these requirements providing positive, fail-safe relief of system pressure from any source.

NIKKISO HydroGarD^™ Safety Relief Valves maintain process and environmental integrity with a sealless, leak-proof design. Their function is specifically configured to remain closed until the opening set pressure is surpassed. Then, they open fully, relieving process pressure to an atmospheric pressure destination and remain open until the pressure in the process line has been reduced to a minimal level. This eliminates the chattering and cycling common to other styles of relief valves.

All valves are built for reliable, dependable performance with a PTFE or FKM diaphragm to protect internal components from exposure to the process fluid. A special port at the bottom of the valve body provides for easy bleeding, sampling or pressure gauge installation.