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Servo Valve

KNR independently developed and optimized the nozzle flapper type mobile robot hydraulic servo valve for the control of the actuator.

knr hydraulic servo valve NF07
KNR¡¯s early model, KSV-2M070, is a mobile servo valve developed with a bandwidth of 60Hz, which is sufficient for application on robot products. It is controlled by 5.5LPM of flow at ¥Ä70bar, and has an internal leak of less than 1LPM.
Recently, we have developed a new product that has a bandwidth of over 150Hz (Over 200Hz for customized models) so that it can be used for industrial purposes and not just robot products. Performance has improved so that it is controlled by 6.5LPM at ¥Ä70bar, and has an internal leak of less than 0.7LPM.
KNR is also capable of controlling position, strength, and compliance by attaching a special KNR-produced controller. Products are available at low prices compared to imported products, information is available for each product to improve control, and can be custom-made to work with robots. These products are leading the spread of hydraulic robots.
We have completed inspection by applying them in platforms unapproachable to humans, such as underwater, nuclear, and high-temperature environments. We continue to conduct R&D to develop a high-response servo valve.

General users can use the product by connecting the application with the special controller (HAC), in a procedure as simple as using a servo motor. Each servo valve provided has the dynamic property curve and assists users to form a dynamic model, and dynamic properties for specific pressure is also provided optionally, eliminating the need to additionally experiment with valves. For advanced users, customized production of valves that adjust underlap, overlap, and inter leakage, etc., is available, helping optimization of assumed system development.

In general, mobile servo valves are very expensive, and customized models incur even higher expenses, but at KNR, optimized models can be purchased at reasonable prices.


knr hydraulic servo valve part name


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