CPI Compression

Hi-Flo RD Valve

Our Hi-Flo™ RD radiused disc compressor valves feature aerodynamic rings to control and seal process gas as it flows in and out of the compressor cylinder, providing efficiency and reliability in extreme temperatures and pressures. The durable thermoplastic radiused ring surface helps stop the build-up of metal, sand or salt particles for better performance than metal and non-profiled rings. Each Hi-Flo™ RD valve is custom designed for its individual application to match special compressor operating conditions.


  • Internal center bolt features a simple, reliable design that is easy to assemble
  • Aerodynamic rings allow the free passage of foreign material and liquid slugs
  • Secondary guidance prevents excessive lateral ring movement
  • Reliable performance in the most demanding operating conditions
  • Provides increased operational efficiency and reduced power consumption
  • Improved flow and reduced pressure drop and backflow
  • Easily maintained and reconditioned
  • Self-aligning performance with good conformability and effective sealing throughout changing temperatures during operating cycles
  • Custom spring design for each application to optimize opening and closing time
  • Available with finger and plug-type unloaders


  • Springs are offered in chrome silicon and Hastelloy C materials
  • Seats and guards are offered in Ductile Iron and 4140 alloy steel for standard valves and in 17-4 stainless steel for corrosive applications
  • Nose diameter – 2.375 in/60 mm and up
  • Capable of operating across a wide range of parameters, including temperatures up to 390°F/200°C and pressures up to 6,000 psi/400 bar



Compressor Valves Overview

  English LTR
  English A4

Midstream Nat Gas Hi-Flo Valves Case Study.pdf