The Enertech Electro-Hydraulic Operator (EHO) uses pressurized hydraulic fluid, directed by electrically actuated solenoid valves, to extend or retract pistons which operate linear or rotary valves.
A hydraulic pump maintains high-pressure fluid in accumulators which is then used to open, close or modulate valves by directing that fluid to the pistons which are coupled to the actuator which strokes the valve.
In the event of an accident or loss of power, the stored energy in the accumulator can be used to return the valve to its safe or normal position, or even provide limited operation. The Enertech EHO provides maximum thrust or torque for critical safety applications.