| 摘要 |
A control valve for a cooling system for hydraulic fluid in hydraulic control systems in wind power turbine or similar control systems comprising a valve member. An electrical powered modulating rotary actuator oscillates with predominantly constant velocity in a valve housing or manifold, wherein the valve housing or manifold comprises a main channel, a control channel and channels. The valve member is a cylindrical member with a side recess with an adjustable shape which is adjusted in accordance with a desired control characteristic of the control valve. The electrical modulating rotary actuator executes oscillating or swinging movements between extreme predetermined angular positions. The control valve is for use in cooling systems for hydraulic fluid in hydraulic control systems in wind power turbine or similar control systems, where the importance of precise and reliable temperature control is significant.
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