OPG1 Hydraulic Pressure Generator / Controller

OPG1 is a compact and easy to use system for generating and adjusting pressures between zero and 200 MPa (30,000 psi) with on-demand high pressure supply and pushbutton, precision pressure control. Time consuming and tiresome manual pumping and/or screw press operation are completely eliminated.

OPG1 is the ideal solution in a variety of applications where high pressure generation and precision control are required including piston gauge and transfer standard based calibration and test systems.

OPG1 is the standard pressure generation and control component in a Fluke Calibration PG7302 high accuracy piston gauge system.

A pneumatically driven hydraulic pump provides continous high pressure oil supply to the high pressure inlet valve. The pump output pressure is set to the desired level using the front panel drive pressure regulator and indicator.

The high pressure inlet valve admits high pressure fluid from the pump for rough ascending pressure control and the high pressure outlet valve returns the fluid to the reservoir to decrease pressure. The high pressure valves are specially designed spring loaded metering valves that operate in a half-turn and cannot be overtightened.

Fine pressure adjustment is achieved using a pneumatically driven variable volume. Rather than being activated by rotational force like a screw press, the variable volume is pneumatically activated through a diaphragm.

Push button momentary valves adjust the air pressure on the diaphragm providing both effort free micro adjustment and very rapid piston movement as needed.

The physical efforts and "end of stroke" operational problems of conventional screw presses are completely eliminated. The variable volume piston position is indicated on the front panel.