The HP model utilizes an external air source for operation. Designed for use in a volumetric type system, the HP features a pressure displacement mechanism.
Two types are available, dispensing either 4cc/cy or 8cc/cy of oil. Further more, various options are available with the air pump. The unit’s 2L tank can either be of plastic or aluminium and a pressure gauge and a float switch can also be installed. The control mechanism, which operates the pump intermittently, should be 3-way NC solenoid valve.