HM Unloader

General (Interpump) HM Unloader is commonly used for pressure washing applications and with General or Interpump pumps.

HM Unloader Valve.

HM Unloader Valve.

  • HM Regulator
    (HM)
    CAD $208.15
  • HM Repair Kit Includes 2,4,9,12-15,19,20
    (RKI072)
    CAD $83.51

Details

This General Pump / Interpump HM Unloader is commonly used for pressure washing applications and in conjunction with General or Interpump Pumps.

It permits excess flow to be bypassed to maintain a selected pressure. Designed for use in systems which incorporate a gasoline engine.

Features:

  • Trapped Pressure Unloader
  • Eliminates back pressure in system when pulling a manual start engine
  • Brass body
  • Stainless steel valve and seat
  • Plastic adjustable pressure control knob
  • Built-in easy start valve
  • Must be mounted in vertical position
  • Operates on single or multiple gun systems
  • Optional spring must be used if mounted in any other position

Specifications:

  • Max. Flow: 10.8 GPM (41 LPM)
  • Max. Discharge Pressure: 3000 PSI (207 BAR)
  • Max. Temperature: 165 degrees Fahrenheit (74 degrees Celsius)
  • Inlet Port Size: 3/8"-19 BSPP-F (9.5 mm)
  • Outlet Port Size: 1/4"-19 BSPP-F (6.5 mm) and 3/8"-19 BSPP-M (9.5 mm)
  • Bypass Port Size: Dual 3/8"-19 BSPP-F (9.5 mm)
  • Dimensions: 2.75" x 3.75" x 6.50" (70 mm x 95 mm x 165 mm)
  • Weight: 2.5 lbs. (1.1 kg)

The General Pump HM Unloader Repair Kit #72 includes:

  • 1 x 36.3102.66 Valve Seat
  • 1 x 36.3104.51 Valve Guide
  • 2 x 90.3575.00 O-Rings
  • 1 x 90.3585.00 O-Ring
  • 1 x 90.3594.00 O-Ring
  • 1 x 90.3822.00 O-Ring
  • 1 x 90.3831.00 O-Ring
  • 1 x 90.3833.00 O-Ring
  • 1 x 90.3843.00 O-Ring
  • 1 x 90.3847.00 O-Ring
  • 1 x 90.5025.00 Anit-Ext. Ring
  • 2 x 90.5080.00 Anit-Ext. Rings
  • 1 x 94.7355.00 Spring
  • 1 x 94.7374.00 Spring
  • 20 x 94.8495.00 Washers
  • 2 x 97.4838.00 Balls

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