Hydronic Air Driven Pumps & Intensifiers
P720 Installation, Use and Maintenance Booklet 08-21-09
Page 3
Installation Guide
Pumps should be installed in a vertical position for optimum functioning of suction and
delivery valves. Suction, pressure and airlines should be ¼” bore. Basic pumps can be
controlled by a hydraulic directional valve. The manual pressure release version will stop
and start the pump at the same time as opening and closing the pressure to tank line.
The air-operated version will require a pneumatic four-way valve to direct air to the
pump or the air-operated pressure to tank line. It may be useful in certain applications
to add lubrication oil to the air inlet. If this action is taken, the following specifications
are advised:
•
Hydraulic oil having viscosity of 150 to 250 SSU
•
Oil temperature 32º F to 150º F
•
Air temperature 40º F to 100º F
•
Room temperature 40º F to 100º F
Compressed Air System
It will be advisable to fit an air filter/regulator unit having minimum flow capacity of 30
scfm plus a pressure gauge in order to ensure the pump has sufficient air energy to work
correctly and provide the hydraulic performance you expect.
Hydraulic System
Valves, pipes, hoses and accessories should all correspond to maximum working
pressure of the pump used and be of a size that will fulfill flow requirements. Bear in mind
the minimum of ¼” bore for the suction line.
Application
Hydronic air driven hydraulic pumps are designed for operating oil hydraulic circuits.
The pump operates simply, a large surface area piston actuated by compressed air.
Attached to it is a piston with a smaller surface area in a hydraulic chamber generating
high hydraulic pressures. The continuous pumping action is produced by the
compressed air being switched by a special valve assembly. By regulating the air
pressure from 30 psi to 100 psi, the maximum hydraulic pressure can be adjusted by the
ratio of the pump used. As the hydraulic load of the circuit increases and the oil
pressure rises, the pump will slow down and eventually stop. In this way, the maximum
load of the circuit will be maintained without air consumption.