Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of moog d662 in China. We warmly welcome you to wholesale bulk moog d662 for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
▔▔The Moog D662 Series is a high-performance, two-stage proportional servo valve equipped with integrated digital controls and electro-hydraulic pilot stages. Engineered primarily for closed-loop control of position, velocity, pressure, and force, the D662 series serves as a benchmark for high-dynamics and high-precision applications in heavy-duty industrial hydraulic systems. Positioned within Moog's premium Servo-Proportional valve line, it excels in high-flow, demanding environments requiring rapid dynamic response, superior linearity, and robust stability under high pressure.
Key Advantages
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- High Dynamic Response & Flow Capacity: Engineered to handle nominal flow rates up to 1500 L/min (396 gpm) with high step-response bandwidth for extreme dynamic precision.
- Integrated Digital Electronics: Onboard digital control electronics compensate for non-linearities, optimize spoo-position loop dynamics, and provide advanced fieldbus communication (CANopen, EtherCAT, or Profibus DP).
- Failsafe & Security Features: Integrated mechanical or electrical failsafe positioning ensures the valve defaults to a safe position during emergency stops or power loss.
- Energy-Efficient Design: Optimized internal flow channels significantly reduce pressure drop across the valve, minimizing heat generation and operational power loss.
Technical Specifications
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| Parameter | Specification / Range | Unit |
| Operating Principle | 2-Stage Proportional / Servo Valve with Onboard Electronics | - |
| Mounting Pattern | ISO 4401 Size 07 (NG16) / ISO 4401 Size 08 (NG25) | - |
| Maximum Operating Pressure (Ports A, B, P) | Up to 350 (5075) | bar (psi) |
| Maximum Pressure (Port T) | Up to 210 (3045) | bar (psi) |
| Rated Flow | 150 to 550 (39.6 to 145.3) | L/min (GPM) |
| Hysteresis | $< 0.1$ | % |
| Response Time (Step Response 0-100%) | 12 to 25 | ms |
| Fluid Viscosity Range | 15 to 400 | - |
| Operating Temperature Range | -20 to +80 (-4 to +176) | degree C (degree F) |
| Recommended Fluid Cleanliness | ISO 4406 Class 16/14/11 (NAS 1638 Class 5) | - |
Configuration Options
▔▔- Valve Body Structure: 2-Stage design featuring a ServoJet or Servovalve pilot stage operating a main-stage spool.
- Control Interface Options: Analog voltage command (0 to 10V, +/-10V) or analog current command (4 to 20mA, +/-10mA). Optional fieldbus interfaces (CANopen, EtherCAT, PROFIBUS DP).
- Position Feedback: LVDT (Linear Variable Differential Transformer) main spool position feedback integrated directly with onboard electronics.
- Flow Configurations: Rated nominal flow sizes ranging from 150 L/min to 550 L/min across size 07 and size 08 body platforms.
- Mounting Style: Subplate mounting matching standard ISO 4401 interface patterns.
- Electrical Connection: Standard 6+PE pin or 11+PE pin industrial connector options meeting IP65 enclosure standards.
Key Materials and Components
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- Valve Body: High-strength ductile iron casting (GJS-400-18) treated for maximum structural integrity and high burst pressure capacity under thermal stress.
- Spool and Bushing Assembly: Hardened stainless steel with specialized surface polishing and anti-wear treatment to maintain zero-lap precision and resist particulate erosion.
- Pilot Stage Flapper & Nozzle / Drive Core: Wear-resistant cobalt-alloy / hardened steel components designed for billions of high-frequency duty cycles.
- Sealing Compounds: Premium Fluorocarbon elastomers (FKM / Viton) standard for synthetic and mineral oil compatibility, with optional Perfluoroelastomer (FFKM) for aggressive fluids.
Packaging and Transport Protection
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- Individual Industrial Packaging: Each valve is fully drained, oil-tested, sealed with protective manifold cover plates, and packed in heavy-duty ESD safe antistatic barrier bags.
- Moisture and Corrosion Protection: Sealed with industrial-grade vapor phase corrosion inhibitors (VCI) and desiccant packs inside the sealed barrier layer.
- Shock Absorption: Encased within custom-molded high-density polyethylene foam inserts to prevent shock and vibration damage during international transit.
- Bulk Packaging Options: Reinforced multi-ply corrugated outer boxes or wooden cases strapped and shrink-wrapped on export pallets for safe freight handling.
Applications
▔▔- Metal Injection Molding & Die-Casting Machines: Controls real-time high-speed shot cylinder injection movement and pressure profiling.
- Blow Molding & Plastics Machinery: Regulates wall thickness (parison control) and dynamic mold clamping cycles with micro-meter accuracy.
- Industrial Hydraulic Presses: Provides precise force, velocity synchronization, and levelling control for stamping, forging, and stretch forming operations.
- Steel Mill Automation & Rolling Mills: Manages hydraulic cylinder positioning in roll-gap control (AGC) and heavy coil handling machinery.
- Gas and Steam Turbine Controls: Regulates main fuel control valve actuators and steam inlet governor valve positions for power generation safety.
Related Models
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| Model Number | Nominal Size | Rated Flow (Δp=35 bar) | Signal Type | Main Function / Feature |
| D662-401D | ISO 07 / NG16 | 150 L/min | +/-10V | High-dynamics position control valve |
| D662-402D | ISO 07 / NG16 | 200 L/min | 4 to 20mA | Standard industrial position and speed control |
| D662-403D | ISO 07 / NG16 | 250 L/min | +/-10V | High-flow servo-proportional control |
| D662-404D | ISO 08 / NG25 | 350 L/min | 4 to 20mA | Heavy-duty speed and force loop control |
| D662-405D | ISO 08 / NG25 | 550 L/min | +/-10V | Maximum flow capacity for large press systems |
FAQ
▔▔Can the Moog D662 directly replace older analog valves?
Yes. Depending on the existing connector pinout and signal range (voltage vs. current), the D662 can directly replace older valve series with minimal wiring or controller calibration adjustments.
What oil cleanliness and filtration level is required for stable operation?
The Moog D662 requires strict fluid contamination control due to its precise spool-bushing tolerances and pilot stage sensitivity. The hydraulic system must be maintained at ISO 4406 cleanliness code 18/16/13 or better (ISO 4406 code 15/13/10 is recommended for pilot oil). We recommend high-pressure filters with a rating of β10 ≥ 200 (10-micron nominal or 3-micron absolute).
Which hydraulic fluids are compatible with Moog D662 valves?
Standard units are compatible with mineral oil based hydraulic fluids (HL or HLP types conforming to DIN 51524). For synthetic or fire-resistant fluids (HFD-U or phosphate esters), units with specialized seal materials (FKM) should be selected.
How should the Moog D662 valve be mounted and installed?
Mount the valve onto an ISO 4401 compliant subplate with a surface flatness of < 0.01 mm over 100 mm and a surface finish of Ra < 0.8 µm. Ensure all O-rings are seated correctly before tightening mounting bolts evenly to the specified torque rating (grade 12.9 bolts required).
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