Product Detail

Model CM

Quick Overview


Rated Working Pressure: 3500 PSI (241 bar)
Rated Non-Shock Pressure: 5000 PSI (345 bar)
Bore Size: 1.5 to 16 in (3.8 to 40.6 cm)

Model CM Specifications

  • High tensile chrome plated piston rods
  • Precision honed steel tubing
  • Urethane rod and piston seals
  • Hytrel rod wiper


  • Cast iron piston rings
  • Stainless steel high tensile rod
  • Self aligning spherical bushings
  • Integral counterbalance valves
  • Integral pilot operated check valves
  • SAE straight thread ports
  • Brass rod scraper
  • Cushions

Use counterbalance valves to restrain flow to keep a load from running ahead of the pump, preventing cavitation. They serve as safety devices in case of line breakage, provide thermal protection with open center valves, and can function as deceleration valves with the circuit shown in the data sheet.

Pilot to open check valves will positively lock the load in position, but will release the load upon application of pressure to the opposite port which is cross piloted. Do not use if overhauling conditions exist.

Valve Specifications Counter Balance Pilot Operated Check
Pressure Drop for Given Flow 20 gpm 76 l/min 120 psi 8.3 bar 80 psi 5.5 bar
30 gpm 114 l/min 200 psi 13.8 bar 250 psi 17.2 bar
Max Operating Pressure 3000 psi 207 bar 3000 psi 207 bar


Product Specifications