MOOG D136-001-008 Industrial servo valve

MOOG D136-001-008 Industrial servo valve

Product Description

The MOOG D136-001-008 is a high-performance industrial servo valve designed for precision control of hydraulic actuators in demanding applications. Part of MOOG’s legacy D100-series, this two-stage, flow-control servo valve translates low-power electrical input signals into precise, high-power hydraulic output. It is renowned for its reliability, dynamic response, and accuracy in closed-loop motion control systems.

Key Specifications & Parameters

1. Type: Two-stage, flapper-nozzle electrohydraulic servo valve.
2. Series: MOOG D100-Series (Legacy Industrial Line).
3. Model Suffix Significance: 
   • D136: Base valve type/size.
   • 001: Specific internal configuration (e.g., flow gain, null adjustment).
   • 008: Coil configuration/voltage (e.g., ±10 mA, single coil).
4. Flow Capacity: Typically rated at 15-25 GPM (57-95 L/min) at 1000 PSI (70 bar) ΔP (exact flow depends on specific 001 configuration and supply pressure).
5. Pressure Rating: 
   • Maximum Operating Pressure: 3000 PSI (210 bar).
   • Maximum Null Leakage: <5% of rated flow.
6. Electrical Input: 
   • Standard: ±10 mA nominal (single coil, 008 suffix).
   • Input Resistance: ~40 Ohms.
   • Other Configurations: Dual coils (±40mA, ±80mA) exist with different suffixes.
7. Performance: 
   • Hysteresis: <3%.
   • Threshold: <1%.
   • Null Shift (Pressure/Flow): <2%.
   • Frequency Response (-3dB @ 90° phase lag): Typically 50-100+ Hz (depends on supply pressure and load).
8. Fluid Compatibility: Mineral-based hydraulic oils per MIL-H-5606 or equivalent, with filtration typically ≤ 10 micron (NAS 1638 Class 6).
9. Porting: SAE or ISO standard mounting patterns (e.g., D05 / NG06).
10. Environmental: 
    • Operating Temp: -40°F to +250°F (-40°C to +121°C).
    • Storage Temp: -65°F to +160°F (-54°C to +71°C).
    • Robust construction for high vibration/shock environments.

Key Features

1. High Precision & Accuracy: Exceptional linearity and low hysteresis enable precise position, force, or velocity control.
2. Fast Dynamic Response: High natural frequency and damping ensure rapid response to input signals.
3. Robust Flapper-Nozzle Pilot Stage: Proven, reliable technology for the torque motor/first stage.
4. Spool Position Feedback: Mechanical feedback linkage ensures stability and linearity.
5. High Pressure & Flow Capability: Suitable for controlling medium-to-large hydraulic cylinders or motors.
6. Industrial Durability: Designed to withstand harsh industrial environments (shock, vibration, temperature extremes).
7. Multiple Configurations: Different suffixes (-001-xxx) denote variations in flow rating, null bias, or coil type for application flexibility.
8. Gold-Plated Terminal Pins: Reliable electrical connections in corrosive environments.

Function & Purpose

• Electrohydraulic Conversion: Transforms a low-power electrical control signal (±10mA) into a proportional, high-power hydraulic flow output between Ports A & B.
• Flow Control: Precisely meters hydraulic fluid flow rate to an actuator (cylinder or motor) based on the input signal magnitude and polarity.
• Directional Control: Controls the direction of flow to the actuator (extend/retract, forward/reverse) based on input signal polarity.
• Core Component in Closed-Loop Systems: Acts as the final control element in servo systems, enabling accurate feedback control of position, force, pressure, or velocity.

Applications & Use Cases

1. Industrial Automation: 
   • Precision machine tools (grinders, EDMs, CNC mills/lathes).
   • Plastic injection molding machines.
   • Metal forming presses (stamping, forging).
   • Roll gap control in rolling mills.
   • Web tension control.
2. Test & Simulation: 
   • Material testing machines (fatigue, tensile, structural).
   • Flight simulators (motion platforms).
   • Vibration testing shakers.
3. Heavy Machinery: 
   • Forestry equipment (harvesters, processors).
   • Mining machinery (shearers, roof supports).
   • Offshore equipment (cranes, winches).
4. Energy: 
   • Turbine governor controls.
   • Valve actuators for critical process control.
5. Simulators & Motion Control: High-fidelity motion platforms.

Application Fields

• Manufacturing: Automotive, aerospace, machinery, plastics, metals.
• Industrial Machinery: Presses, machine tools, material handling.
• Test & Measurement: Structural testing, fatigue testing, environmental simulation.
• Energy & Power Generation: Hydraulic turbine controls, valve actuation.
• Offshore & Marine: Crane control, winch control.
• Research & Development: Motion control, fluid power research.