Product Overview
The MOOG D635Z681E is a high-performance servo proportional valve from the renowned MOOG D635 series, engineered for precise electrohydraulic control in demanding industrial and mobile applications. Utilizing MOOG’s proven two-stage servo valve design, this component features a torque motor pilot stage that actuates a precision spool within the main valve body, delivering infinitely variable flow control proportional to the electrical input signal. The D635Z681E is specifically configured for position, velocity, force, and pressure control loops where fast dynamic response, high resolution, and minimal hysteresis are critical. As a direct-operated servo proportional valve, it serves as the central control element in closed-loop hydraulic systems, ensuring accurate actuator positioning and smooth motion profiles across a wide range of operating conditions.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Proportional Valve (Two-Stage, Spool Type) |
| Model Designation | MOOG D635Z681E |
| Operating Pressure | Up to 315 bar (standard industrial grade) |
| Rated Flow | Model-dependent (typically 5–40 L/min at 70 bar valve drop) |
| Pilot Stage | Torque motor with mechanical feedback |
| Mounting & Connection | Standard ISO 4401 / CETOP interface, subplate mounting |
| Electrical Interface | Standard MOOG valve connector, ±10 V or ±10 mA command signal |
| Hysteresis | < 0.5% of rated signal (typical) |
| Response Time | High dynamic response, suitable for closed-loop control |
Engineering Features & Advantages
- Precision Performance: The torque motor pilot stage and precision-ground spool deliver infinitely variable flow control with minimal hysteresis, high resolution, and excellent repeatability, ensuring accurate actuator positioning in closed-loop systems.
- Fast Dynamic Response: Optimized pilot stage and spool geometry enable rapid response to command signal changes, making the D635Z681E ideal for high-cycle industrial applications requiring tight motion control.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction that resists contamination and maintains stable performance over extended service intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original MOOG D635 series specifications, ensuring drop-in replacement without modification to existing manifolds or control systems.
- Versatile Control Capability: Suitable for position, velocity, force, and pressure control loops, providing system designers with a single valve solution for diverse hydraulic control requirements.
Typical Industrial Applications</h
PRODUCT IMAGES
MOOG D635Z681E Servo Proportional Valve
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine MOOG D635Z681E Servo Proportional Directional Control Valve. This Germany-made high-response hydraulic valve features a closed-loop spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.