The pneumatic powered HPU is designed for use with sour gas, sweet gas, or instrument air at pressures ranging from 60 psi to 2000 psi. The system converts pneumatic pressure into stored hydraulic power by means of a pneumatic driven hydraulic pump. The system is totally self-contained and requires no electrical power, pressure switches or motor starters. Pneumatic powered HPUs are used frequently on offshore platforms. The advantage is that actuator sizes can be reduced significantly because the low pressure pneumatic power source has been converted to high pressure hydraulic power.
Applications: BOP Control System, Emergency Shutdown Systems, CALM Buoy Power Units.