Company:BMTI PRECISION MECHATRONICS CO.,LTD
Address:No.4 Wangjing Road, Chaoyang District, Beijing, China
Postcode:100102
Tel:+86-10- 64739667
Fax:+86-10- 64739665
Email:gwsales@jcsjm.com
QDY62 Servo Valve
QDY62 Servo Valve

QDY62 Servo Valve

Description
QDY62 series Hydraulic throttle valve is a key control part of the electro-hydraulic servo control system, acting on electro-hydraulic conversion and power amplification. The performance and reliability will directly affect the performance and reliability of the entire system, so it is the core of electro-hydraulic servo-control system.
Our self-developed electrical throttle control valves have been widely used in metallurgy, aerospace, shipbuilding, automobile, textile, and printing industry.

Advantages
1. QDY62 series servo valves are double nozzle flapper servo valve, which have great performance on fast dynamic response, pressure sensitivity and linearity, small zero drift, low required input. power.
2. It adopts stainless steel shell, with the characters of compact structure, light weight.
3. It is allowed to select the 5th oil port for controlling the pilot valve separately.
4. With mechanical zero adjustment mechanism to facilitate users to adjust.

Component of QDY62 Hydraulic Throttle Valve
Electrical throttle control valve is a closed-loop control system, which generally consists of electro-mechanical conversion, power amplifier, feedback.

1. Electro-mechanical conversion parts: in nozzle flapper servo valve, electro-mechanical conversion parts is a torque motor, the principle of operation is to convert the current of input coil swinging into the mechanical energy of the armature.











2. Power amplifier section: power amplifier is convert the input mechanical energy of the swing armature into the hydraulic energy of pressure and flow. In QDY series electrical feedback valve, the power amplifier is mostly achieved by flapper-structure.










3. Feedback: this part is to feedback the output pressure or flow to the preceding stage as the displacement, force or other forms. Due to this feedback mechanism, the servo valve itself is a closed-loop control system. QDY series servo valve is force feedback servo valve, to achieve the feedback function by bezel components.









Technical Parameter of Hydraulic Throttle Valve
Type

QDY62
Supply oil pressure range 
Mpa
1.5 to 31.11
Rated supply oil pressure 
Mpa
21
Rated flow QN [L/min] (at valve pressure drop of 7MPa) 
L/min
10, 20, 40, 60
Rated current
mA
15
Hysteresis  
%
≤1
Resolution 
%
≤0.5
Non linearity 
%
≤±10
Asymmetry 
%
≤±10
Pressure gain 
%
>30
Internal leakage 
L/min
≤2
Bias 
%
≤±3
Zero drift of supply oil pressure(80 to 110% Ps) 
%
≤±2
Zero drift of return oil pressure(0 to 20% Ps)
%
≤±2
Zero drift in temperature(-30 to +150) 
%
≤±4
Frequency
Amplitude frequency width (-3db)
Hz
>20
Phase frequency width (-90°)
Hz
>40
Work temperature 

-20 to +100
Net weight 
Kg
 1.9


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