Electrohydraulic Servo Valve Qdy6 - China

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:

• Posted By: BMTI PRECISION MECHATRONICS CO., LTD

• Phone: 15801624867

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

• Email:

• Website: http://www.jcsjm.com

• 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.