CPI Compression

Ported Plate Valves

We offer a full line of metallic and non-metallic Ported Plate Valve assemblies and components for air and process gas compressors. Each Ported Plate Valve is custom designed to match your specific compressor operating conditions.


  • Non-metallic sealing component materials provide excellent chemical resistance, high temperature tolerances and strong impact capabilities in a wide variety of applications
  • Metallic sealing and dampening plates are manufactured from high quality, heat-treated stainless steel
  • Easily maintained and reconditioned
  • Ideal for medium and high-pressure compressors operating at high speed and varying degrees of capacity
  • Available with finger and plug-type unloaders
  • Custom spring design for each application to optimize opening and closing times


  • Seats and guards are offered in Ductile Iron and 4140 alloy steel for standard valves and in 17-4 stainless steel for corrosive applications
  • Springs are offered in chrome silicon and Hastelloy C materials
  • Capable of operating across temperature over 500°F/260°C and pressure over 5,000 psi/345 bar
  • Nose diameter —1.57 in/40 mm and up