One-Stage Electrohydraulic Flow Controlling Servo Valve with Two Nozzles and Flapper Force Feedback Design

Features:
(1) Dry torque motorized electrohydraulic servo valve with double nozzles and flapper type single stage of amplification.
(2) Excellent performance, high dynamic response, steady operation, reliable and long service life.
(3) Using super hard aluminum alloy shell, and compact structure.

QDY-I Performance Specifications
Model: QDY5
Supply oil pressure range(MPa) 1.5-21
Rated supply oil pressure(MPa) 21
Rated flow Qn(L/min) (at valve pressure drop of 7MPa) 1.2
Rated current In(mA) 30,40
Hysteresis(%)≤3
Resolution(%)≤0.5
Non linearity(%)≤±10
Asymmetry(%)≤±10
Pressure gain >30
Bias(%)≤±3
Zero drift of supply oil pressure(80-110% Ps)(%)≤±2
Zero drift of return oil pressure(0-20% Ps)(%)≤±2
Zero drift in temperature (-30-+150℃)(%)≤±3
Frequency characteristics:
Amplitude frequency width(-3dB)(Hz) ＞500
Phase frequency width(-90°）(Hz)＞500
Net weight(kg) 0.3