HOP

A hydraulic actuator that receives an instrumentation signal of 4 to 20 mA and then rotates the operating axis into the position corresponding to the signal.
E/E positioner, hydraulic channel switching valve, hydraulic pump, cylinder, etc. are all packaged in a compact form.
It receives external instrumentation signals with a positioner and recognizes any deviation from the current position.
The actuator uses a switching valve to switch the hydraulic channel in the relevant direction needed to eliminate the deviation, and then rotates the operating axis into the position corresponding to the signal.
The operating axis rotates at a speed proportional to deviation, which is unique to our company, thus realizing stable positioning without overshooting.

Features

• ＜High-power hydraulic pressure ensures trouble-free operation.＞
  Each unit that makes up the actuator is rigid and supports high-power operation.
  The mechanism part is simple with few adjustable parts, which makes it easier to maintain than other servo valve type ones.
• ＜Simple installation＞
  Mechanical work merely involves linking the operating axis of this device to the operating end such as a butterfly valve.
  Electric work merely involves wiring for motor power supply and input signals.
• ＜Various models are available to ensure that the necessary torque can be selected.＞
• ＜Highly-efficient mechanism saves on energy and results in relatively low deterioration of the hydraulic oil.＞
  When the actuator is stopped, the pump remains unloaded.
  Any increase in temperature of the oil is therefore relatively low, thus helping to suppress any deterioration. Maintenance intervals are therefore also longer in between.
• ＜Simple switching of operating direction＞
  The direction can be easily changed with the switch on the positioner and the opening signal can be reversed as well with the switch.
• ＜Various additional other devices can also be added.＞
  Manual operating equipment and hydraulic source failure detector can be added, which can be remote-controlled with the external switch.
  Limit switch for the signals and opening degree output signal are included as standard equipment.

Specifications