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Reciprocating Compressors


High-pressure reciprocating compressors

High-pressure versions of CMO and SMC reciprocating compressors, with swept volumes of 100–450 m3/h

The blocks of the compressor units in the HPO/HPC range are cast in high-strength ductile iron, making them particularly strong and capable of operating under exceptionally high pressures. Max. discharge pressures: up to 40 bar for HPC units and 50 bar for HPO units. Max. suction pressure: 26 bar (for both HPC and HPO). This results in condensing temperatures of up to 70°C, and makes HPO/HPC compressors ideal for use in conjunction with heat pumps and hot water applications, and as an extra “supercharge” stage in traditional ammonia plants. Range: Six different models are available to provide swept volumes of between 97 and 452 m3/h.


  • Automatic capacity control and high coefficient of performance (COP), with excellent part-load characteristics.
  • Excellent accessibility €“ including simple-to-clean water covers and externally accessible oil pump/filter (HPC only) €“ and few requirements for spare parts
  • Any necessary repairs can normally be undertaken without having to remove the compressor.
  • Lightweight pistons, chromium piston rings, gasdampened discharge valves and hardened cylinder liner surfaces.
  • Spring-loaded safety heads, balanced refrigeranttight shaft seal, asbestos-free gaskets and an internal bypass valve to prevent excessive pressure.

Product List6 items

Product CodeNumber of cylindersBore x strokeSwept volume at max. 1800 rpmAvailable
4100 x 80 mm226 m3/h
6100 x 80 mm339 m3/h
8100 x 80 mm452 m3/h
470 x 70 mm97 m3/h
670 x 70 mm146 m3/h
870 x 70 mm194 m3/h