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The D691-072D series of electro-hydraulic servo valves from Moog Company in the United States adopts a direct acting structure, eliminating the need for a pilot stage to avoid leakage losses, and its dynamic response is independent of the system working pressure. The installation bottom meets the ISO 4401 flange standard and is compatible with flange sizes ranging from ISO 4401 Size 05 to 10.
Mainly used in metal pressing equipment (shearing machines, bending machines, pipe bending machines) and wood presses that require high-speed and precise flow control.
Upper limit of working pressure: 31.5 MPa (≈ 4500 psi)
Flow control range: 3.8~100 L/min (approximately 1~26 gpm)
Frequency response: 70   Hz (high-frequency response)
Valve body type: Direct acting electro-hydraulic servo proportional valve, using displacement sensor for point feedback of the main valve core, and internal electronic amplifier for closed-loop control.
Applicable medium: Conventional hydraulic oil (meeting the compatibility requirements of valve body materials)
Power supply: Common 24   VDC (specific voltage model can be confirmed through the matching controller, no clear value is listed in the literature)
Main applications: High frequency hydraulic control systems for metal stamping, bending, pipe bending, wood pressing, etc.

Product Introduction：
No pilot leakage: The direct acting design eliminates the leakage risk of traditional pilot valves.
High frequency response: A frequency response of 70 Hz enables the valve to follow fast control commands, making it suitable for high-speed stamping and precision positioning systems.
Fast step: A 15 ms step response ensures real-time flow regulation.
Pressure independence: Dynamic response is not affected by system operating pressure, improving system stability.
Standardized installation: ISO 4401 flanges facilitate quick integration on various hydraulic platforms.

Category: Industrial Control Module
Sold to: Global
Scope of application: Steel plants/thermal power plants/tire plants/water plants, etc
Service advantages: foreign imports, stock supply, competitive prices, and quality assurance
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