Electro-hydraulic actuators
High-power output with the power of hydraulic pressure
Very useful in refuse incineration plants, sewage treatment plants, cement kilns, inlet vane actuators, etc.
In refuse incineration facilities, the air sent into melting furnaces must be adjusted in order to maintain combustion efficiency for safe incineration.
Since a large amount of air must be sent into the furnaces in a high-temperature environment, tough dampers and valves that require high power to rotate are used.
Electro-hydraulic actuators are used in many plants because they are high-power and fast-operating actuators.
Pressure-sensitive part electric type
Hydraulic actuators operated by the instruction of external instrumentation signal (4-20 mA).
Type using electromagnetic valve as switching part
This type switches hydraulic circuits using an electromagnetic valve.
●Features
The unloaded hydraulic circuit system reduces oil temperature rise and slows deterioration of hydraulic oil.
The number of parts that require maintenance is few, making maintenance and inspections easier.
Good operation accuracy due to electric control.
HOP series
Maximum torque: 100 Nm to 10,000 Nm
Compact actuator with E/E positioner, hydraulic channel switching valve, hydraulic pump, cylinder, etc.
SST series
Maximum torque: 1,500 Nm to 4,500 Nm
Developed by upgrading the HOP series hydraulic actuator with solenoid operated selector valve to higher-speed, higher-accuracy and higher-torque actuator
Type using jet pipe as switching part
This type switches hydraulic circuits using a jet pipe.
●Features
The full-load hydraulic circuit system keeps output torque constant regardless of load (pressing is possible when fully closed).
Smooth operation, and constant holding and operating torque
Relatively resistant to hydraulic oil contamination.
EOP series
Maximum torque: 300 Nm to 10,000 Nm
Actuator capable of receiving instrumentation signals such as 4-20 mA and bringing out mechanical motion as rotation of the operation axis or rectilinear motion of the axis in proportion to the instrumentation signals.
SOP series
Maximum torque: 300 Nm to 10,000 Nm
High precision and quick response enabled via a servo system incorporating electrical feedback and a servo amplifier instead of a mechanical restoration mechanism.
Pressure-sensitive part direct-pressure type
Hydraulic actuators that operate by receiving the signals necessary for control with a built-in diaphragm.
Type using jet pipe as switching part
This type switches hydraulic circuits using a jet pipe.
●Features
The full-load hydraulic circuit system keeps output torque constant regardless of load (pressing is possible when fully closed).
Smooth operation, and constant holding and operating torque
Relatively resistant to hydraulic oil contamination.
COP series
Maximum torque: 300 Nm to 10,000 Nm
Receives the signals necessary for control with a pressure diaphragm to directly control the jet pipe.
Smooth operation with no control delay.
Additional devices
Additional devices used to control actuators