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Regular price $ 4,200.00


Please allow a 7-10 business day lead time

The Haskel EXT420 is a pneumatically driven single stage, double acting R600 butane refrigerant transfer pump. EXT-420 high-pressure, positive-displacement two-stage piston pumps are safe, proven, reliable, and energy saving butane/propane extraction pumps. The high-pressure pumps offer the flexibility to speed completely variable from zero to maximum lbs/minute. No need for bypass valves, simply add gauges and hoses to suit your application.


Pump Ratio 4:1
Pump Displacement
per Cycle
20 cu. in.
Drive Size 5 in.
Max Outlet Pressure 1250 PSI
Seals Viton
Wetted Section Metals Stainless Steel


Features and Benefits

  • Single stage when inlet pressures are 25 to 50 psi (1.7 to 3.4 bar) and outlet pressures are 125 to 150 psi (8.6 to 10.3 bar) 
  • The pump will transfer approximately lb/ min with an inlet pressure of 50 psi (3.4 bar) and an outlet pressure of 150 psi (10.3 bar) at maximum speed 
  • Will draw pressure down to 15 psi (1 bar) with an outlet pressure of 150 psi (10.3 bar)
  • Safe for handling propane and butane (Vent port must be connected to an exhaust line that vents leaked gas outdoors) 
  • Viton and PTFE seals 
  • Stainless steel and aluminum wetted components 
  • High butane transfer rates 
  • No electrical components 
  • Stall against load - start against load - or run dry 
  • Requires compressed air to drive the pump - approximately 30 CFM at 100 psi (7 bar) to run the pump at maximum speed (about 60 cycles per minute) 
  • Clean No lubrication required in the gas section Nothing is added to the gas