Piston check valves offer dependable one-way flow control with tight shutoff and a range of pressure ratings and configurations. These valves are available in compact or full-size bodies with NPT thread or hose barb ends, accommodating sizes from 1/16” to 3/4”. Body materials include brass, stainless steel, and nickel-plated brass, with spring options in 302 stainless steel or Hastelloy. Seals in Buna-N, EPDM, Viton, or Neoprene support broad media compatibility. Choose from economical to high-performance options, with cracking pressures from 1 to 25 psi and pressure ratings up to 500 psi.