Nikkiso Clean Energy & Industrial Gases Group

Products & Services

Cryogenic Pumps

Centrifugal Pump
TC-21HD & TC-21J

The Model TC-21J & TC-21HD pump assemblies are single-stage, foot mounted pumps. The TC-21J is jackshaft driven by belt and the TC-21HD is designed to be driven by a hydraulic motor. For the TC-21J, the shaft includes standard size keyways at each end; for the TC-21HD, the shaft is splined for hydraulic motor drive The pump features all bronze construction with pump housings, impeller and inducer all made from bronze with a stainless steel shaft. This construction makes the pump ideal for use in liquid oxygen service in addition to other cryogenic liquids.

Features & Benefits

  • State-of-the-art CFS mechanical seal for extended life
  • High performance impeller provides a high flow rate with minimum NPSH required
  • Machined heavy duty stainless steel shaft provides vibration free performance
  • All bronze construction allows for oxygen compatibility


  • Trailer off-loading

Liquids Pumped

  • Nitrogen
  • Oxygen
  • Argon
  • Methane

Model TC-21J & TC-21HD 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


  • Optional stainless steel intermediate & backplate
  • Speed pick-up & tachometer
  • Pump & bearing housing
  • SAE-B flange to accept direct hydraulic motor mounting (HD only)
  • Mounting brackets with locking tabs
  • Port for speed verification
  • Purge port (mechanical seal)

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