Check Valves

Designed with tamper-proof qualities, this vent to atmosphere high-pressure relief valve is suitable for liquid or gas-based applications. With an encapsulated o-ring seal and narrow-band interchangeable springs, this relief valve eliminates seal extrusion, cold flow, and minimizes system pressure rise.

With a metal-to-metal positive stop, this direct-acting inline check valve ensures a long service life and is suitable for pressure and vacuum applications. Bubble tight sealing is achieved by a line of contact between a seat and a standard elastomer O-ring with minimum differential pressure, regardless of mounting attitude.

Designed with a brass body construction, this pressure regulator and control valve features a maximum inlet pressure of 400 psi, a spring reference, as well as a fully balanced internally piloted relieving regulator. Quick-acting, its 180° adjustment knob sets outlet pressure from 0 to full line pressure.

Compact, highly accurate, and direct-acting, this vent relief valve is factory preset to desired crack pressure and/or flow specifications. With a quad ring seal, this valve provides for extreme accuracy as well as repeatability with a narrow reseal band.

Compact, highly accurate, and direct-acting, this vent relief valve is factory preset to desired crack pressure and/or flow specifications. With a quad ring seal, this valve provides for extreme accuracy as well as repeatability with a narrow reseal band.

Compact with a fully retained O-ring seal, this one-piece check valve is poppet type and suitable for working pressures to 3000 psig. Also, this valve is 100% factory tested and available cleaned and packaged for oxygen service.

Designed with an integral bonnet, this forged needle valve features a PTFE and metallic wafer stem packing, which provides long-life and leak-tight service from vacuum to the maximum operating pressure.

Designed for low torque, quarter turn, and positive shut-off of forward-flow up to 3000 psig (207 bar), this shut-off valve seals with a standard elastomeric O-ring seal. With a one-piece body construction, this shut-off valve also features a machined metallic replaceable plug stem.

Compact and highly accurate, this vent relief valve is factory preset to desired crack pressure and/or flow specifications. With an internal adjustment, this valve provides tamper-proof safety against inadvertent pressure changes and features an encapsulated O-ring seal to prevent extrusion at higher differential pressures.

Suitable for both gas and liquid applications, this poppet check valve features a fully retained O-ring seal design that permits full-rated pressure in the checked direction. With a metal-to-metal positive stop, this valve provides a trouble-free service life in the most demanding applications.

Built for accurate and repeatable flow control of fluids and gases, these precision metering valves feature a one-piece forged body and a screwed bonnet design. With standard panel mounting and lockable adjustments, these valves offer precise metering solutions.