These versatile 3-inch reciprocating pumps are designed and built for long-lasting dependability, minimized maintenance and easy serviceability. They start purging when air pressure is applied and stop when air pressure is removed. The 3-inch (76 mm) pump is a low-cost double-acting unit that’s ideal for service as a transfer pump, reservoir header pump, or to supply medium-sized centralized lubrication systems. These 50:1, lube-to-air ratio pumps can be utilized in systems with pressures of up to 3750 psi (259 bar). All are offered with a Bung Adapter that converts them for use with oil drums.