Lincoln 4491 3.5:1 Air Operated Oil Pump, For 250 to 275 Gallon Tanks, 6 gpm, 1/4 Inch NPTF Air Inlet, 1/2 Inch NPTF Outlet
- Lincoln 4491 air operated single acting oil pump dispenses low and medium viscosity lubricants from bulk tanks. It features a 3.5:1 pressure ratio, up to 6 gpm delivery, and NPTF ports for easy integration. This is a standalone transfer pump, not a replacement part.
- Features:
- 3.5:1 pressure ratio with 20 to 120 psi air supply supports medium pressure dispensing for oils and ATF
- Up to 6 gpm delivery reduces fill time for service bays and bulk transfer applications
- NPTF ports simplify plumbing: 1/4 inch air inlet and 1/2 inch material outlet for standard shop connections
- Includes:
- Model 4491 pump assembly
- Bung bushing for 250 to 275 gallon bulk tank mounting
- Specifications:
- Manufacturer: Lincoln Industrial
- Part Number: 4491
- Pressure Ratio: 3.5:1
- Delivery Output: Up to 6 gpm
- Air Supply Range: 20 to 120 psi
- Air Inlet: 1/4 inch NPTF, 18 TPI
- Material Outlet: 1/2 inch NPTF
- Output per Stroke: 91 cubic centimeters
- Recommended Fluids: Petroleum based and synthetic motor oils, transmission fluid, petroleum based hydraulic fluids
- Container Compatibility: 250 to 275 gallon bulk tanks; bung bushing supplied
- System Compatibility / Application: For dispensing and transferring lubricants from bulk tanks in automotive and industrial service; not a replacement part
- The Lincoln 4491 air operated oil pump can also be referred to as 3.5 to 1 oil pump, bulk tank oil transfer pump, air driven oil pump, 6 gpm oil pump, and NPTF port oil pump.
Lincoln Industrial designs lubrication and fluid handling equipment for professional maintenance and industrial applications. The 4491 oil pump provides dependable, medium pressure delivery of compatible lubricants from bulk tanks.
Q: What tank size is the 4491 designed for?
A: It is designed for placement into 250 to 275 gallon bulk tanks and ships with a bung bushing for mounting.
Q: What fluids are suitable?
A: Petroleum based and synthetic motor oils, transmission fluid, and petroleum based hydraulic fluids that are compatible with the pump’s construction.
Q: What are the connection sizes?
A: The air inlet is 1/4 inch NPTF with 18 threads per inch, and the material outlet is 1/2 inch NPTF.
