• The Model 4475 pump is a reciprocating-piston, low-pressure single action pump. Air powers the pump’s piston on the dispensing, or working, stroke. An internal spring returns the piston and resets it for the working stroke. It pumps continuously when the dispensing (fluid outlet) valve is open and 20-120 psig air is supplied to the pump.
• Outlet: 1/2" NPTF
• Operation: Pneum. pressure delivery stroke, spring return stroke
• Attachment: 2" Bung, adj. for 55-gal & 16-gal drums, bench & portable tank
• Effective pump ratio: 0.7:1 to 0.8:1
• Inlet Air Pressure: Max: 120 psi, Min: 20 PSI
• Pump Tube Length: 34"
• Free Delivery: Up to 4 gpm.