DSL Box Lubricators feature heavy-duty precision metering pumps capable of accurately delivering small flows of either mineral or synthetic oil to machinery injection points. The single-piston pump is mechanically driven from a common camshaft in the reservoir and is adjustable from 2.0 to 6.25 drops per stroke. The 18 drive options provide many variations to suit the application. The pump’s maximum pressure is 3,000 psi. All working parts are totally enclosed away from dirt, water, and impurities and selflubricated at all times by the fluid in the watertight reservoir. DSL Pumps are rugged, heavy duty units. The pump cylinder housing is a precision machined casting fitted with an alloy steel piston.