311 – 5 FRAME PLUNGER PUMP Home > Brands > CAT Pumps > Plunger Pumps > 311 – 5 FRAME PLUNGER PUMP Posted on September 30, 2016October 17, 2016 by tugz Technical Specifications Max Flow: 4 Min Pressure: 100 Max Pressure: 2200 Inlet Port Size: 1/2″NPT(F) Discharge Port Size: 3/8″NPT(F) RPM: 950 Drive Type(s): Belt Material: Stainless Steel (SS)