The V-5-H is a heavy duty hydraulic diaphragm metering pumps designed for trouble free operation with a minimum of maintenance. The pump is driven by a continuous heavy duty oil filled speed reducer which is available in several ratios for the required stroking rate. Various piston sizes are available (from 5/8" to 2") to give a wide range of volume outputs. The pump head comes standard in polyethylene but is available in various grades of stainless steel. The various hydraulic head sizes are interchangeable which makes application changes in the field simple. All V-5-H pumps are supplied with a pressure relief valve for each head. The standard simplex pump can readily be converted into a duplex pump in the field. Multiple head pumps can be fitted with identical heads or different sized heads for custom applications.