Samson 531421 Pumpmaster45 Grease Pump with 120 lb Drum

The Samson 531421 Pumpmaster45 is a pneumatic grease pump engineered for industrial and commercial lubrication environments where high output pressure and reliable flow are non-negotiable. With a 40:1 air-to-fluid pressure ratio, this pump can generate the force required to move heavy NLGI Grade 2 grease through extended hose runs, multi-point distribution systems, and tight-clearance fittings that would stall lower-ratio pumps. The maximum free flow rate of 22 lb/min ensures that high-volume greasing operations — from fleet maintenance bays to manufacturing floor lube points — proceed efficiently without bottlenecks.

The pump's wetted and sealed components are constructed from cast iron, steel, hard-chromed steel, UHMWPE, NBR, and PTFE, providing a durable combination that resists the abrasive and chemical demands of industrial greases. It flange-mounts directly to standard 120 lb grease drums and operates across a broad 20 to 200 psi air pressure input range, giving technicians the flexibility to dial output up for fast bulk dispensing or down for controlled, precise application. The Pumpmaster45 is built for environments where equipment uptime depends on a lubrication system that simply works, shift after shift.