Comet APS121 Diaphragm Pump

APS121 is a three diaphragm pump with 1 3/8" (35 mm) male 6 spline PTO shaft on both sides.

Comet APS121 Three-Diaphragm Pump.

Comet APS121 Three-Diaphragm Pump.

  • Comet APS121 Diaphragm Pump
    CAD $2,412.42
  • Comet Repair Kit APS101 and APS121
    CAD $407.84


The Comet APS121 is a high pressure, three diaphragm pump made with anodized aluminum materials for great chemical resistance, allowing use with many agricultural chemicals including liquid fertilizers, herbicides, pesticides, suspension products, de-icing materials, and more. Perfect for many high pressure applications involving lawn care, weed control, pest control, tree spraying, agricultural and horticultural spraying, and more.

APS121: Three diaphragm pump with 1-3/8" (35 mm) male 6-spline PTO shaft on both sides. Pressure accumulator and safety valve come standard.

  • Max. Flow: 30 gpm (114 L/min)
  • Max. Pressure: 725 psi (50 bar)
  • Max. Rated Speed: 550 rpm
  • Max. Fluid Temperature: 104° F (40° C)
  • Min. Power: 14.5 hp
  • Port Sizes: 1-1/2" (38 mm) inlet
  • Three semi-hydraulic diaphragms.
  • High pressure pump.
  • Anodized aluminum materials.
  • Pump Shaft Rotation: CW and CCW
  • Large capacity oil bath crank case.
  • Adapts to PTO, gas engine, hydraulic motors, or belts drives.
  • Self-priming.
  • Can run dry.
  • Weight: 84 lb (38 kg)

Recommended regulator for the APS121 Diaphragm Pump is the 1204.0801 regulator.

Repair Kit 5026.0089 Includes

  • 3 x 1800.0012 Buna Diaphragms
  • 6 x 1210.0385 O-Rings
  • 6 x 1220.0034 Valve Assembly Kits
  • 3 x 1210.0047 O-Rings
  • 3 x 1210.0145 O-Rings
  • 1 x 1800.0034 Diaphragm

For information on this pump, please view the files under Related Information.

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Related Information

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