Medium-Pressure Diaphragm Pump DP-185.1

  • 3-diaphragm design.
  • Ideal for agriculture and industrial use including horticulture, lawn care, nursery, car wash, air blast orchard/vineyard and poultry houses.
  • Various mounting options that make them convenient to mount on sprayers with a PTO drive or can be equipped with either gasoline, electric or hydraulic motors.
  • All fluid ends are anodized aluminum.
  • Check valves are stainless steel, ideal for protection against most harsh chemicals and abrasion.
  • All moving parts are completely submerged in oil, which increases the reliability of the pump.
  • Diaphragms are constructed from chemical resistant elastomers that ensure a long pump life even when used with aggressive chemicals.



ModelDescriptionMax Flow GPMMax Pres. PSIMax Speed RPMMax Power HPMax Temp. ° FSuct. Hose Diam.Disch. Hose Diam.Weight LBLube Oil
DP-185.13 diaphragms18.5 @ 145 PSI5805507.4140° F1-1/4″ Hose3/4″ NPT33.030 SAE


  • NEW DP-185.1-GRI: Includes gearbox to fit 8 and 11 HP engines and SC-1240-3 regulator


  • SC Series: Spray Guns and Lances.
  • SC-1240-3: Pressure Regulator.
  • DP-321006: Gearbox for 8 and 11 HP engines.
  • Pump has crankshaft flange on one side, 1-3/8″ spline shaft opposite side. Must order solid shaft separately (DP-318793 for 3/4″ solid shaft) or (DP-318590 for 1″ solid shaft).
  • DP-31874897: Hydraulic Adapter (SAE “B”).