Alemite 9951-1 Air-operated Grease Pump 4.5 Lb/min 50:1

Product Description

The ALEMITE 9951-1 is an air-operated grease pump engineered for high-volume lubrication work in commercial and industrial service environments. Running at a 50:1 pump ratio, it delivers grease at up to 4.5 pounds per minute through a 3/8 inch NPTF female outlet, making it a practical choice for fleet maintenance bays, manufacturing floors, and heavy equipment service shops. The pump body is constructed from steel, aluminum, stainless steel, and nylon — a material combination selected for resistance to grease-compatible chemicals and long service life under continuous air pressure. A 1/4 inch air inlet thread connection feeds the drive side of the pump. Licensed lubrication technicians and journeyman mechanics are the primary installers of this unit.

This pump is designed for use with bulk grease containers in the 40 to 399.9 pound range, with primary compatibility rated for 120 pound drums. The 9951-1 ships as a complete system kit. Included components are a 7 foot material hose (317875-7), bare pump (9950-1), control valve (6320-3), cover (338371), dolly (316315-5), follower (338802), and Z swivel (52752). This makes it a ready-to-deploy solution for drum-mounted grease dispensing without sourcing additional accessories separately. The dolly and follower plate combination simplifies drum changeover in high-use service bays.

Key Features

• 50:1 pump ratio delivers up to 4.5 lb/min grease output for high-demand lubrication applications
• Compatible with bulk grease containers from 40 to 399.9 pounds; optimized for 120 pound drums
• Complete kit includes hose, control valve, follower, dolly, cover, and Z swivel — no additional accessories required at installation
• 1/4 inch air inlet and 3/8 inch NPTF female outlet for standard shop air and grease line connections
• Multi-material construction — steel, aluminum, stainless steel, and nylon — for chemical compatibility and durability
• 7 foot material hose included for reach flexibility at the drum

Compatibility

Designed for use with bulk grease drums in the 40 to 399.9 pound container size range. The follower plate and cover included in this kit are sized for 120 pound grease drums. Specific system compatibility should be verified against ALEMITE documentation for the 9950-1 bare pump and associated accessories.

Installation Notes

Installation should be performed by a qualified lubrication equipment technician or industrial mechanic familiar with air-operated pump systems. Shut off and bleed the compressed air supply before connecting or disconnecting any fittings. Verify that the shop air supply pressure falls within the operating range specified in the ALEMITE 9951-1 installation manual before startup. Ensure all NPTF thread connections are properly sealed with an appropriate thread sealant rated for grease service.