Medium-Pressure Diaphragm Pump DP-74.1

3 diaphragms. Can be PTO mounted, gasoline engine, hydraulic motor, or electric motor driven.



  • 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.


Model Max Flow GPM Max Pres. PSI Max Speed RPM Max Power HP Max Temp. ° F Suct. Hose Diam. Disch. Hose Diam. Weight LB Lube Oil
DP-74.1 7.4 580 550 2.5 140° F 1″ Hose 1/2″ NPT 16.0 30 SAE


  • SC Series: Spray Guns and Lances.
  • SC-1241-2: Pressure Regulator.
  • SC-1132-2: Pressure Regulator.
  • SC-1240-3: Pressure Regulator.
  • DP-321009: Gearbox for 3.5 and 5 HP Engines.
  • Pump equipped with crankshaft flange, must order shaft separately (DP-318793 for 3/4″ solid shaft) or (DP-318590 for 1″ solid shaft).
  • DP-318343: Female 1-1/3″ Shaft Kit.
  • DP-310049: Male 1-3/8″ Shaft Kit.
  • DP-31874897: Hydraulic Adapter (SAE “B”).