QDY2 Series Servo Valve

Description
QDY2 electro-hydraulic servo valve has absorb the advantages of similar products at home and abroad, with small size, light weight, good stability, high sensitivity, zero drift, frequency bandwidth, long life and high reliability.
Throttle servo valve is suitable for automatic control systems, such as position control, speed control, acceleration control, force control, pressure control and synchronization control system. As a result, It can achieve high accuracy and high speed requirements of the system.

Application
Self-developed hydraulic servo valves have been widely used in metallurgy, aerospace, shipbuilding, automobile, textile and printing industry.

Features
1. Dry torque motorized throttle servo valve is equipped with double nozzles and flapper type single stage amplifier.
2. The electrical feedback valve features excellent performance, high dynamic response, steady operation, reliable and long service life.
3. It adopts stainless steel shell, with the characters of compact structure, light weight.

Technical Parameters of Hydraulic Servo Valve

Type			QDY2
Supply oil pressure range		Mpa	1.5 to 28
Rated supply oil pressure		Mpa	21
Rated flow QN [L/min] (at valve pressure drop of 7MPa)		L/min	12
Rated current		mA	10
Hysteresis		%	≤3
Resolution		%	≤1
Non linearity		%	≤±5
Asymmetry		%	≤±10
Pressure gain		%	＞30
Internal leakage		L/min	≤1.0
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)		%	≤±2
Frequency	Amplitude frequency width (-3db)	Hz	＞100
	Phase frequency width (-90°)	Hz	＞100
Work temperature		℃	-40 to +100
Net weight		Kg	0.35