Servo Valve
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Hydraulic Servo Valve Overview KNR Systems develops its own nozzle-flapper-type servo valve, specifically for use in hydraulic robots. The valve operates at a bandwidth over 60 Hz. We provide product specification, such as frequency response and Internal leakage, in order to help developers establish a dynamics system model. The servo valve can be easily applied to a system, similar to the method of the servo-motor, with the use of KNR's HAC board as well as other valve control boards. Simply connect the valve to a control board, and the valveactuator system can be controlled like a motor. While miniature servo valves generally cost a lot, KNR's ability to customize and to optimize presents economically priced custom-manufactured servo valves. Our customization categories include underlap, overlap, internal leakage, etc. FEATURES Customization High-Response Characteristics Miniature Design for Robots Special Product INTERNAL LEAKAGE 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 17124, Korea Tel 82. 31. 326. 3500 Fax 82. 31. 326. 3519 E-mail rnd@knrsys.com

Technical Data

Hydraulic Servo Valve Customization Service - Spool Option UNDERLAP Fast Response Stable Response High internal leakage High Bandwidth 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 17124, Korea Tel 82. 31. 326. 3500 Fax 82. 31. 326. 3519 E-mail rnd@knrsys.com

Hydraulic Servo Valve Performance Graph The figure shows the change in the load pressure over input current while the bidirectional control ports are closed and the flow rate is zero. The Null Bias in two different conditions (100bar/210bar) can be seen. Null Bias < 0.2mA Threshold < 1.0% Pressure Gain The figure shows the internal leakage curve of a valve. The maximum leakage is effected by the type of the spool used, which can be customized between underlap and overlap. Internal Leakage < 1ℓ /min Null Bias < 0.2mA Internal Leak 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si,...

Hydraulic Servo Valve Performance Graph The figure shows control flow rate over input current. The data was repeatedly recorded over full current range from positive to negative at a frequency of 0.01Hz, independent from the dynamic characteristics. Hysteresis < 3% Null Bias < 0.2mA Hysteresis The figure shows the frequency response at an input pressure of 210 bar. Upon request, the valve can be customize to perform over 90 Hz. Amplitude ratio(dB) Amplitude & phase spectrum Frequency Response ≥ 60Hz @-3dB Phase lag ≥ 40Hz @90deg Rated Signal : 25% Frequency Response 159, Wonam-ro,...

Hydraulic Servo Valve PRESSURE PORT (8.0 O.D x 6.0 I.D X 1 Thickness) Control Port C2 Electrical Detail Rated Current : 30mA Coil Resistance : 300 Ω Connection : Black & White (+) Yellow & Red (-) 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 17124, Korea Tel 82. 31. 326. 3500 Fax 82. 31. 326. 3519 E-mail rnd@knrsys.com

Hydraulic Servo Valve Application Manipulator MP3 (KNR’s Multi-Purpose Manipulator) Gibbon (KNR’s Hydraulic Mobile Robot in a nuclear power plant) (Body:10 (Rad/hr), Grip:10 (Rad/hr)) 5 Project supported by MOTIE, “Development of Wearable Robot for Industrial Labor Support.” UW2 (KNR’s Underwater Manipulator) Project supported by MKE, “Development of Quadruped Legged Robot Platform Technology” 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 17124, Korea Tel 82. 31. 326. 3500 Fax 82. 31. 326. 3519 E-mail rnd

Hydraulic Servo Valve MAY, 2016 Contact R&D Center 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 17124, Korea Tel 82. 31. 326. 3500 Fax 82. 31. 326. 3519 E-mail ● Technical Support : rnd@knrsys.com ● Quotation : quotation@knrsys.com Website rnd.knrsys.com SNS ● Youtube : https://www.youtube.com/user/knrrnd ● Twitter : https://twitter.com/knrrnd Head Office 1, Cheondeoksan-ro 482beon-gil, Namsa-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 17124, Korea Tel 82. 31. 330. 2500 Fax 82. 31. 330. 2519 Website www.knrsys.com 159, Wonam-ro, Namsa-myeon, Cheoin-gu, Yongin-si,...