Poly Diaphragm Pump DP-555-P

5 diaphragms. Through Shaft 1-3/8″ 6-spline opposite ends. Negative pressure – max: 4.9 ft; intermittent: 9.8 ft.



  • The heads are designed with a patented technology that includes an aluminum die-cast core inside a polypropylene structure offering superior strength.
  • Washers and diaphragm bolts are in 316 stainless steel, an exclusive feature.
  • Die cast crankcase incorporating a new cooling system.
  • New chemically resistant diaphragm material pre-deformed to reduce the amount of deflection, increasing diaphragm life. The diaphragm material is compatible with most of the corrosive chemicals on the market today.
  • A short crankshaft stroke means the longest life possible.
  • New connecting rods in special bronze alloy offer economical and trouble free service.
  • 316 stainless steel inlet and outlet check valves.


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-555-P 55.5 218 550 8.0 140° F 2″ Hose 1″ NPT 72.6 30 SAE


  • SC Series: Spray Guns and Lances.
  • SC-2660-3: Pressure Regulator.