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Annovi Reverberi AR503-GR3/4-GCI Diaphragm Pump with Gearbox and Pressure Regulator

  • Includes pressure regulator and gearbox for attaching to a 5-6.5 HP gas engine with a 3/4" keyed shaft.
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Product Description

The Annovi Reverberi AR503-GR3/4-GCI Diaphragm Pump comes equipped with an RM40 Pressure Regulator and an AR1636 Gearbox so you can attach to a 5-6.5 HP gasoline engine with a 3/4" keyed shaft.

This medium pressure diaphragm pump features anodized aluminum and stainless steel liquid handling parts, as well as three BlueFlex diaphragms, to enable the pumping and spraying of a wide variety of agricultural chemicals. Some of these include herbicides, pesticides, insecticides, fungicides, liquid fertilizers, de-icing materials, and other hard-to-handle liquids. An excellent choice on small-to-medium sized sprayers due to its superlative performance, this diaphragm pump can be used for agricultural spraying, crop spraying, lawn / turf spraying, vineyard and orchard spraying, de-icing, and more. It also can be used for medium-height tree spraying up to 60'.


  • Includes RM40 Pressure Regulator and AR1636 Gearbox to attach to a 5-6.5 HP gas engine with a 3/4" keyed shaft
  • Max. Flow Rate: 14.3 gpm
  • Max. Pressure: 580 psi 
  • Max. Pump Speed: 3600 RPM with gas engine
  • Max. Fluid Temperature: 140° F 
  • Port Sizes: 1 1/4" HB inlet, 3/4" NPT outlet
  • Anodized aluminum housing
  • Anodized aluminum and stainless steel liquid handling parts
  • Three semi-hydraulic BlueFlex diaphragms
  • Buna seals
  • Die-cast casing with oil-immersed mechanism
  • Oil drainage stopper
  • Air-hydraulic damper
  • Crankcase Oil Capacity: 22 ounces
  • Weight: 41 lb.
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