Pneumatic pump is a double piston pump, one piston having a relatively large diameter and the other a relatively small diameter. The two pistons are connected together and fit inside two connected cylinders. The larger piston is driven by compressed air (the gas alternately driving the piston in one direction and then the other) and actuates the smaller piston, which pumps the liquid. The system acts as a pressure amplifier, as the output pressure from the pump with the smaller piston will be equal to the pressure applied to the larger piston times the ratio of the cross-sectional area of the larger piston to that of the smaller piston. It is the simplest type of pump that can be designed to provide exceedingly high pressures.
Pneumatic RAM Pumps are capable of transferring grease at a rate of 4.5 lb. per minute. These double-acting pumps are designed to reduce line pulsation and allow lower operating pressure. These are designed to operate with or without a lubricator. It allows air motor and spool valve that are easily accessible without removing the downtube.
Fully pneumatic controller provides automatic control over down well recovery pump fill and discharge rates. It includes an automatic draining micron inlet air filter, pressure safety relief valve and on/off valve. It does not require any batteries or electrical power to operate. It features independent timers assuring optimal pump cycling frequency under any lift and submergence condition.