Nikkiso Clean Energy & Industrial Gases Group

Products & Services

Cryogenic Pumps

Centrifugal Pump

The AC-18 pump is a single-stage, foot mounted pump that is designed to be driven by a hydraulic motor. The design provides a lightweight, compact unit that is simple to install. The AC-18 features aluminum construction with pump and bearing housings, as well as the mounting stand. The shaft seal is a CFS mechanical type having a composite face. The CFS design extends seal life beyond that of a standard mechanical seal. A slinger is incorporated on the shaft between the shaft seal and the adjacent bearing to protect the bearing in the event of a seal failure.

Features & Benefits

  • Compact, lightweight design reduces installation time
  • Hydraulic drive allows operators to use truck pto system
  • Bearing housing designed for well service, heavy duty applications
  • Shaft seal features CFS design – extending seal life


  • Trailer loading/off-loading
  • Boost pump
  • Liquid storage transfer

Liquids Pumped

  • Nitrogen
  • Argon
  • Methane

AC-18 Pump 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



  • Pump, bearing housing & hydraulic coupling
  • CFS mechanical seal
  • Purge ports
  • Optional accessories include:
    • Purge kit (bearings)
    • Mating flanges

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