Nikkiso Clean Energy & Industrial Gases Group

Products & Services

Cryogenic Pumps

Reciprocating Pump

The RPSA model is a cylinder filling pump that comes equipped with a tungsten carbide coated piston that significantly increases the life of the seals in abbrasive media service. Its sealed drive end requires no field maintenance.

Features & Benefits

  • Tungsten carbide coated piston helps increase the life of the seals
  • Simple cold end design assembly for easy maintenance
  • Heavy duty grease lubricated drive for longer life and less maintenance (regreasing not necessary)
  • Pump packing is adjusted through a large access port for easy adjustments and extended packing life


  •  Carbon dioxide cylinder filling
  •  Nitrous oxide cylinder filling

Liquids Pumped

  • Carbon Dioxide
  • Nitrous Oxide

RPSA Table

Flow Rate Max.1000³/h (4400 gpm)
Head max.600m (1,970 ft)
Fluid Temperature
-130℃ to +450℃ (-201 to 842°F)
Viscosity Max.500mPa·s
Design Pressure:20MPa (2900 psig)
Casing Material

Austenitic Stainless steel (304SS, 316SS, etc.)
Hastelloy*1 C/B Equivalent Alloy
Monel*2, others Equivalent Alloy

Motor power range0.75 to 250kW
Ex-ProtectionVarious international explosion-protection (ATEX,IEC,CSA,TRCU, etc.) CE marking

Typical Scope of Supply

  • Cold end, grease lubricated drive assembly & electric motor
  • Galvanized steel base plate with belt guard
  • Surge chamber and relief valve

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