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Electrohydraulic Servo Valve Qdy6 - China

price: contact company for price

Two-Stage Electrohydraulic Flow Controlling Servo Valve with Two Nozzles

and Flapper Force Feedback

Design Features

(1) Using dry torque motor and two stages of hydraulic amplification structures: The pre stage is a friction free flapper valve of two nozzles.

(2) High valve-core driving force, steady zero, high sensibility, high resolution, low hysteresis, and long reliability in service.

QDY6

Supply oil pressure range (MPa) 1.5-31.5

Rated supply oil pressure (MPa)31.5

Rated flow Qn (L/min) (at valve pressure drop of 7MPa) 4, 10, 20, 40, 60

Rated current ln (mA) 15, 30, 40, 80

Hysteresis(%) ≤3

Resolution(%)≤0.5

Non linearity(%) ≤±8

Asymmetry(%) ≤±10

Internal leakage (L/min)≤1.3

Bias(%)≤±3

Zero drift of supply oil pressure ≤±2

Zero drift of return oil pressure ≤±4

Frequency characteristics

Amplitude frequency width(-3dB)(Hz) 60-100

Phase frequency width(-90°)(Hz)60-100

Net weight(kg) 1.2

Model: QDY10

Supply oil pressure range (MPa)1.5~28

Rated supply oil pressure (MPa)25

Rated flow Qn (L/min) (at valve pressure drop of 7MPa)100, 125, 150

Rated current In (mA)40, 80

Hysteresis (%)≤3

Resolution (%)≤0.5

Non linearity (%)≤±10

Asymmetry (%)≤±10

Pressure gain (%Ps/1%In)>30

Internal leakage (L/min)≤2.5

Bias (%)≤±3

Zero drift of supply oil pressure (80-110% Ps) (%)≤±3

Zero drift of return oil pressure (0-20% Ps) (%)≤±2

Zero drift in temperature (-30~+150C) (%)≤±4

Frequency characteristics

Amplitude frequency width (-3dB) (Hz)>35-50

Phase frequency width (-90°) (Hz)>30-50

Net weight (kg) 4.0 for al. body, 7.5 for steel body

Model: QDY11B

Supply oil pressure range (MPa)1.5-21

Rated supply oil pressure (MPa)16

Rated flow Qn (L/min) (at valve pressure drop of 7MPa)200, 250

Rated current In (mA)15, 30, 40

Hysteresis (%)≤4

Resolution (%)≤1

Pressure gain (%Ps/1%In)>25

Internal leakage (L/min)≤3.2

Zero drift in temperature (-30~+150 C) (%)≤±4

Frequency characteristics

Amplitude frequency width (-3dB) (Hz)>20

Phase frequency width (-90°) (Hz)>25

Net weight (kg) 6.5

Model: QDY12

Supply oil pressure range (MPa)1.5-25

Rated supply oil pressure (MPa)21

Rated flow Qn (L/min) (at valve pressure drop of 7MPa)4, 10, 20, 40

Rated current In (mA)30, 40

Non linearity (%)≤±8

Pressure gain (%Ps/1%In)>30

Internal leakage (L/min)≤1.2

Zero drift of supply oil pressure (80-110% Ps) (%)≤±2

Amplitude frequency width (-3dB) (Hz)>120

Phase frequency width (-90°) (Hz)>120

Net weight (kg)1.4

Model: QDY14

Amplitude frequency width (-3dB) (Hz)60-100

Phase frequency width (-90°) (Hz)60-100

Net weight (kg)0.9

Model: QDY15

Internal leakage (L/min)≤1.5

Amplitude frequency width (-3dB) (Hz)>50

Phase frequency width (-90°) (Hz)>60

Net weight (kg)0.8


Company Contact:


  • Phone: 15801624867

  • Address: No. 4 Wangjing Road, Chaoyang District, Beijing, China

  • Email: Email


Published date: August 20, 2013 -

  • Business Description: BMTI Precision Mechatronics Co., Ltd. started research of pneumatic and

    hydraulic automatic control technology as early as in 1950s, and her

    research results and application level are leading in China. In more

    than 50 years, she always adheres to the road combining scientific

    research with production, and the hydraulic and pneumatic products

    researched & developed independently by her have been widely used in

    metallurgy, aerospace, shipbuilding, automobile, textile, and printing

    industry. Her modern manufacturing equipment and inspection conditions

    as well as perfect quality management system have ensured the steady and

    reliable quality of her products. She owns a professional and complete

    R&D team with rich practical experiences, and can undertake research of

    subjects specified by the state as well as development of new products,

    also complete turnkey projects for hydraulic and pneumatic subjects, and

    customize personalized solutions for the users focused at pneumatic and

    hydraulic technology.

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