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PacSeal Hydraulics’ hard seat check valves (also referred to as retention or reflux valves) are used in hydraulic control systems to prevent reverse transmission of pressure or to create unidirectional flow control.

Check valves are commonly used to protect a pump or compressor by preventing the downstream stored energy in a hydraulic circuit from entering the pump’s outlet. A check valve is strongly recommended especially if an accumulator is used downstream of a pump or compressor. Check valves may also be employed throughout a hydraulic circuit, before and after other control components to manage the direction of flow*.

PacSeal Hydraulics’ check valves have a zinc-plated carbon steel body and a hardened stainless steel in-line poppet to provide a metal-to-metal seal for long life with any contaminated fluid. Contrary to soft seated check valves, our check valves are metal seated for improved reliability and longevity in critical service conditions.

*Never rely on the check valve as a block valve for downstream maintenance.


  • Made in the USA
  • The sealing components are hardened stainless steel to endure contaminated fluids at high pressure and with high flow velocity.
  • Zinc-plated carbon steel body will withstand corrosive environments


General CV-50 CV-100
Inlet Port Female 1/2 in. NPT Female 1 in. NPT
Outlet Port Female 1/2 in. NPT Female 1 in. NPT
Cv 5 12
Rated Flow 35 GPM 75 GPM
Rated Working Pressure 5000 psi 5000 psi
Temperature Rating -65° to 350°F -65° to 350°F
Poppet Hardened Stainless Steel
Body Zinc-Plated Carbon Steel
Spring Stainless Steel
Snap Ring Zinc-Plated Steel


  • Oil and Gas Production and Drilling
  • BOP Control Units
  • Frac Valve Controls
  • Accumulator Circuits
  • Steel Mills, Rolling Mills, and Foundries
  • Hydraulic Circuits

Ordering Information

To receive pricing, simply call PacSeal or use our Request a Quote tool while referencing the check valve model and part number.

Model No. Part No. Port Size (Female) CV
CV-50 40-1508 1/2 in. NPT 5
CV-100 40-1507 1 in. NPT 12

PacSeal Hydraulics

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