Shaanxi Qindiyuan Environmental Protection Equipment Co., Ltd.
                                                                                                           
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8 Years
Since 2018
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MOOG D661-4651 Industrial Servo Valve Electro pneumatic 40 L/min

Price Negotiable
Price: Negotiable
MOQ: 1 pcs
Delivery Time: 5-7 days
Brand: MOOG
Product Description
I. Core Specifications (Essential for Foreign Trade/Quotation)
1. Hydraulic Parameters
Parameters Indicators Description
Model D661-4651 Complete Model: D661-4651/G35J0AA6VSX2HA
Type Two-stage servo valve (jet pilot + spool power stage) With spool position feedback (LVDT)
Maximum working pressure 350 bar (35 MPa) P/A/B port; T port ≤350 bar
Rated flow rate 40 L/min @70 bar valve pressure drop (typical)
Maximum flow rate Approx. 200 L/min (depending on spool specification)  
Step response ≤14 ms 100% signal, at 210 bar
Frequency response 30–50 Hz ±100% input signal
Control accuracy Hysteresis < 0.8%, Linearity < 1% Minimum controllable flow deviation ≤0.5%  
Working medium Petroleum-based hydraulic oil (DIN 51524), water glycol, phosphate ester  
Oil viscosity Recommended 15–45 mm²/s; Permissible 5–400 mm²/s  
Cleanliness ISO 4406 <15/12 (standard); <14/11 (long life)  
2. Electrical parameters
Parameters Specifications Description
Supply voltage 24 VDC (18–32 VDC)  
Control signal ±10 V, ±10 mA, 4–20 mA (optional)  
Coil resistance 20 Ω (single coil) / 40 Ω (series)  
Protection rating IP65 (with matching plug)  
Ambient temperature -20°C ~ +60°C; Oil: -20°C ~ +80°C  
Vibration 30g, Triaxial  
3. Mechanical and Installation
Parameters Indicators Description
Installation Standard ISO 4401 Dimension 05 (CETOP 05)  
Installation Method 35mm DIN rail or flange mounting Any installation position
Valve Body Material Aluminum alloy / Precipitation hardened stainless steel  
Sealing Nitrile rubber (NBR), Fluororubber (FKM) optional  
4. Supply and Warranty
  • Delivery Time: Regularly 8–12 weeks, some in stock
  • Warranty: 12 months from the manufacturer
  • Origin: USA / Europe
II. Core Advantages
  1. ServoJet® Jet Tube Pilot: Highly resistant to contamination, no pilot oil source required, simple maintenance.
  2. Integrated Electronics + LVDT Feedback: In-valve closed-loop control, high precision, good stability, and strong anti-interference.
  3. Fast Response + High Pressure and High Flow: Suitable for high-speed, heavy-duty closed-loop systems (such as rolling mills, injection molding machines, and testing benches).
  4. Wide Media Compatibility: Adaptable to various hydraulic oils to meet different operating conditions.
  5. High Reliability: Low hysteresis and high repeatability, suitable for continuous production environments.
III. Typical Applications
  • Metallurgical Equipment: Roll gap control, tension control in rolling mills
  • Plastics Machinery: Servo control for injection molding machines and extruders
  • Testing Equipment: Material testing machines, hydraulic servo testing benches
  • Industrial Automation: Pressure/Position/Force closed-loop control systems
  • Construction Machinery: Precision control of heavy-duty hydraulic actuators

Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Shaanxi Qindiyuan Environmental Protection Equipment Co., Ltd.
Location F1-803, Guorun Silu Jin Rong Zhongxin, Qindu District, Xianyang City, Shaanxi Province
Contact Person Leon Lee

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