1. Product Overview
The4WMM10is a manually operated directional control valve featuring a direct-acting spool design. It is used in hydraulic systems to control the flow direction of hydraulic fluid, enabling the start, stop, and directional reversal of actuators such as hydraulic cylinders and motors. With a plate-mounted design, it offers compact structure, flexible operation, and high reliability, making it widely applicable in construction machinery, industrial automation equipment, and other fields.
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2. Technical Specifications
• Nominal Size: 10 mm
• Maximum Operating Pressure: 31.5 MPa (some models up to 35 MPa)
• Flow Rate: Up to 300 L/min (depends on model and operating conditions)
• Operation Method: Manual lever or handle
• Spool Positions: 2-position 3-way, 2-position 4-way, or 3-position 4-way (varies by model)
• Connection Type: Plate-mounted (ISO 6020/2 compliant)
• Temperature Range: -20°C to +80°C (standard seal material)
• Weight: Approx. 1–4.6 kg (depends on model and configuration)
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3. Structure and Working Principle
Key Components
• Valve Body: Main structure containing fluid channels and mounting interfaces.
• Handle/Lever: Manual actuator for driving spool movement.
• Control Spool: Shifts axially to alter fluid path connections.
• Return Spring: Maintains spool in neutral or initial position.
• Push Rod: Transmits handle force to drive spool movement.
Working Principle
• Rotating or pushing/pulling the handle shifts the spool, redirecting fluid flow.
• When the handle returns to neutral, the return spring resets the spool to its default position, restoring fluid paths.
• Optional positioners or spring return mechanisms can be added for specific applications.
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4. Model Designation
Example:4WMM10E30B/F
• 4WMM: Series code (4 = 4-way, W = directional valve, MM = manual operation).
• 10: Nominal size (10 mm).
• E30: Design variant or pressure rating (E may indicate specific structure; 30 may denote pressure or flow characteristics).
• B/F: Connection type or seal material (B = plate-mounted; F = fluororubber seals).
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5. Applications
1. Construction Machinery
• Excavators, loaders, cranes, etc., for controlling hydraulic cylinder extension/retraction and slewing.
2. Industrial Automation
• Press machines, die-casting machines, injection molding machines, etc., for mold opening/closing and ejection.
3. Agricultural Machinery
• Tractors, combine harvesters, etc., for steering and speed control of hydraulic motors.
4. Other Fields
• Marine, metallurgy, mining, etc., for fluid path switching and directional control in hydraulic systems.
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6. Product Features
1. High Reliability
• Direct-acting design with simple structure and low failure rate.
• Precision-machined and heat-treated key components (e.g., spool, valve body) for wear resistance.
2. Flexible Operation
• Manual operation without external power, enabling rapid response.
• Optional positioners for multi-position fixed operation.
3. Easy Installation
• Plate-mounted design for seamless integration with hydraulic piping.
• Compliant with international standards for interchangeability with other brands.
4. Strong Adaptability
• Supports multiple spool functions (2-position 3-way, 3-position 4-way, etc.) to meet diverse system needs.
• Operates stably in harsh environments (high temperature, high pressure, heavy dust).
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7. Selection Guidelines
1. By Nominal Size
• Ensure valve size matches system piping to avoid flow loss or excessive pressure.
2. By Pressure Rating
• Select valve rated pressure based on system maximum operating pressure, with safety margin.
3. By Functional Requirements
• Determine required spool function (e.g., 2-position 3-way, 3-position 4-way).
• Choose whether positioners or spring return mechanisms are needed.
4. By Installation Method
• Confirm plate-mounted design compatibility with system layout.
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8. Maintenance and Care
1. Regular Inspections
• Check handle operation for smoothness and sticking.
• Inspect seals for leaks; replace if necessary.
2. Cleaning
• Periodically clean valve body surface to prevent oil and dust accumulation.
• Avoid corrosive cleaners to protect seals.
3. Seal Replacement
• Replace seals every 1–2 years based on usage.
4. Storage Conditions
• Store in a dry, ventilated, non-corrosive environment for long-term storage.
• Avoid direct sunlight and high temperatures to prevent seal aging.
