These pumps are advised for the transfer of medium - high viscosity oil (SAE 15/240), and antifreeze, for medium - long distance (490 - 650 ft). The delivery capacity of a pump varies according to particular applications and combinations: the pressure of air supplied; viscosity and temperature of the fluid; dimensions of delivery hose; dimensions of connections and type of gun which is used. The operating pressure may vary between a minimum of 44 psi and maximum of 116 psi. The double acting guarantees the delivery of a continuous and constant low, suitable for installations on distribution facilities. To optimize the performance and the time-life of the air operated pumps advised to use filtered and lubricated air.