Delavan designs, engineers and manufactures a wide variety of roller pumps to meet the widest ranges of low-volume, moderate-pressure pumping applications. To ensure the best performance for your investment, we incorporate such features as “Ultra” rollers, heavy-duty sealed bearings, Viton seal rings, stainless steel shafts and rotors, and close tolerance machining. Max flow: 9.2 GPM. Max pressure: 150 PSI. Max speed: 2600 RPM. Port sizes: 3/4″ NPT. Pump shaft rotation: CW. Our eBay Store About Us Contact Us Add to Favorite Sellers Delavan 4 Roller Cast Iron Pump 5/8″ Shaft & 3/4″ NPT Inlet & Outlet 146.95 Delavan designs, engineers and manufactures a wide variety of roller pumps to meet the widest ranges of low-volume, moderate-pressure pumping applications. To ensure the best performance for your investment, we incorporate such features as “Ultra” rollers, heavy-duty sealed bearings, Viton seal rings, stainless steel shafts and rotors, and close tolerance machining. All are standard. Max flow: 9.2 GPM. Max pressure: 150 PSI. Max speed: 2600 RPM. Port sizes: 3/4″ NPT. Pump shaft rotation: CW. 5/8″ solid stainless steel shaft (1/2″ hollow shaft also available).