I. Core Specifications (Essential for Foreign Trade/Quotation)
1. Hydraulic Parameters
Table
Parameters
Indicators
Description
Model
G631-3004B
Complete Model: G631-3004B
Type
Two-stage servo valve (dual-nozzle baffle pilot + spool power stage)
Mechanical Feedback (MFB)
Maximum Working Pressure
315 bar (31.5 MPa)
P/A/B port; T port ≤315 bar
Rated Flow Rate
20 L/min
@35 bar Valve Pressure Drop (single valve port)
Maximum Flow Rate
Approx. 75 L/min (depending on valve core specification)
Step Response
≤12–15 ms
100% signal, at 210 bar
Frequency Response
75–120 Hz
±100% input signal
Control Accuracy
Hysteresis ≤0.2%, Resolution < 0.1%, Repeatability < 0.3%
Working Medium
Petroleum-based hydraulic oil (DIN 51524), water-glycol, phosphate ester
Oil Viscosity
Recommended 10–85 mm²/s; Permissible 5–1250 mm²/s
Cleanliness
ISO 4406 <17/14/11 (long life); <19/16/13 (functional safety)
2. Electrical Parameters
Table
Parameters
Indicators
Description
Control Signal
±30 mA / ±100 mA (standard); Optional ±15 mA / ±50 mA
Coil Resistance
Approx. 80 Ω (single coil)
Protection Rating
IP65 (with matching plug)
Ambient Temperature
-40°C ～ +135°C; Oil: -20°C ～ +80°C
Vibration
30g, Triaxial
3. Mechanical and Installation
Table
Parameters
Indicators
Description
Installation Standard
ISO 4401
Dimension 05 (CETOP 05)
Installation Method
Flange Fixed
Any Installation Position
Valve Body Material
Aluminum Alloy / Stainless Steel
Sealing
Nitrile Rubber (NBR), Fluororubber (FKM) Optional
Weight
2.2 kg
4. Supply and Warranty
• Delivery Time: Regularly 8–12 weeks, some in stock
• Warranty: 12 months from the manufacturer
• Origin: USA
II. Core Advantages
1. Dual Nozzle Baffle + Mechanical Feedback: Extremely high control accuracy, minimal hysteresis, and extremely fast response, suitable for precision closed-loop control.
2. Robust and Durable: Hardened valve core and sleeve, dry torque motor, resistant to contamination and long service life.
3. Flexible Configuration: Supports independent pilot control from the fifth port (X port), adaptable to complex systems.
4. Easy Maintenance: Pilot stage filter disc can be replaced on-site, reducing downtime.
5. Wide Operating Condition Adaptability: High pressure, wide temperature, and wide viscosity range, meeting harsh industrial environments.
III. Typical Applications
• Precision Testing Equipment: Material testing machines, servo testing benches
• Plastics Machinery: Precision control of injection molding machines and extruders
• Metallurgical Equipment: Servo systems for rolling mills and continuous casting machines
• Industrial Automation: Pressure/position/force closed-loop control systems
• Aerospace: Ground testing equipment, hydraulic simulation systems
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