They are based in Hyderabad, India and focus primarily on high-pressure hydraulic vane pumps.

The first stage is usually based on a roughing pump, most commonly a standard rotary vane pump.

The hydraulic pressure typically comes from a gerotor or rotary vane pump driven by the vehicle's engine.

Rotary vane pumps use a cam with retractable vanes to create suction.

These rotary vane pumps are not widely used anymore.

This is the pumping mechanism for the historical vane pump or motor.

Pumped air injection systems use a vane pump turned by the engine via a belt or electric motor.

It is even possible for a vane pump to pump in reverse if the eccentric ring moves far enough.

Go look up the principle of a vane pump).

Modern units can exceed 300 bars in continuous operation, although vane pumps are not regarded as "high pressure" components.