Ingersoll Rand lm2203a-11-c Piston Oil Pump 3:1 Ratio

Product Description

The INGERSOLL RAND lm2203a-11-c is a piston-style oil pump from the ARO LM Series, designed for industrial fluid transfer applications. It operates on a 3:1 air-to-fluid pressure ratio and features a 2-inch air motor diameter. The pump delivers a working flow rate of 6 gallons per minute (gpm) and a free flow rate of 9 gpm, making it well suited for consistent, high-cycle pumping of oils and other fluids across a range of viscosities. Precision-machined internal components support long service intervals in demanding environments. This unit is typically installed and serviced by industrial maintenance technicians or fluid handling specialists.

The lm2203a-11-c is intended for use in manufacturing plants, automotive service facilities, chemical processing operations, and other industrial settings where reliable, continuous fluid transfer is required. The air-operated design eliminates the need for electrical power at the pump point, making it practical for use in areas where spark-free operation or remote placement is a priority. Fluid inlet and outlet connections use standard NPT and NPTF fittings for straightforward integration into existing plumbing runs.

Key Features

• 3:1 air-to-fluid pressure ratio for efficient fluid transfer
• 2-inch air motor diameter for smooth, consistent output
• Working flow rate of 6 gpm with free flow up to 9 gpm
• 3/4-inch fluid inlet for high-volume intake capability
• 1/2-inch NPTF outlet and 1/4-inch NPT air inlet for standard connection compatibility
• Precision-machined components designed to minimize maintenance downtime

Compatibility

Designed as an OEM-style replacement or direct-install unit within the ARO LM Series piston pump lineup for industrial fluid transfer systems.

Installation Notes

Installation should be performed by a qualified industrial maintenance technician or fluid system specialist. Shut off and depressurize the air supply line completely before connecting or disconnecting the pump. Ensure all fluid inlet, outlet, and air inlet fittings are properly sealed and torqued per the fitting manufacturer specifications. Verify that the air supply pressure does not exceed the rated operating range for this pump series before startup.

Technical Specifications

• Pump Type: Piston
• Pressure Ratio: 3:1
• Air Motor Diameter: 2 inches
• Working Flow Rate: 6 gpm
• Free Flow Rate: 9 gpm
• Fluid Inlet Size: 3/4 inches NPT
• Outlet Size: 1/2 inches NPTF
• Air Inlet Size: 1/4 inches NPT

Standard Information

• Brand: INGERSOLL RAND
• Manufacturer Part Number: lm2203a-11-c