HM3-4 Banks Proportional Remote Control Valve

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3 year

Product details

1. Product Overview

TheHM3-4 Banks Proportional Remote Control Valveis an electro-hydraulic proportional control valve that precisely regulates hydraulic system flow, pressure, or direction by converting electrical control signals (e.g., voltage or current) into continuous motion of hydraulic actuators (e.g., cylinders, motors). It is ideal for industrial or mobile hydraulic systems requiring high precision and dynamic response.

Typical Applications:

• Hydraulic arm control in construction machinery (excavators, cranes, loaders).

• Automated operations in agricultural machinery (combine harvesters, seeders).

• Precision motion control in industrial equipment (injection molding machines, die-casting machines).

• Hydraulic drives for marine steering gears and deck machinery.

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2. Structure and Working Principle

2.1 Structural Components

• Proportional Solenoid: Receives signals from the Electronic Control Unit (ECU) to generate proportional thrust.

• Valve Body: Integrates main spool, springs, and orifices for flow/pressure regulation.

• Feedback Device(Optional): Built-in displacement or pressure sensors enable closed-loop control for enhanced accuracy.

• Ports:

• Electrical Interface: DIN 43650 or M12 connectors, supporting PWM or analog signal input.

• Hydraulic Interface: Compliant with SAE, DIN, or ISO standards for various piping systems.

2.2 Working Principle

1. Signal Input: The ECU outputs a 0-10V DC or 4-20mA current signal to the proportional solenoid.

2. Electromagnetic Force Conversion: Solenoid thrust moves the spool, adjusting the valve port opening.

3. Hydraulic Regulation:

• Flow Control: Spool displacement regulates flow, enabling actuator speed control.

• Pressure Control: Relief valve structure limits system maximum pressure.

4. Feedback Correction(Closed-Loop Models): Sensors monitor spool position or system pressure in real-time, feeding data back to the ECU for dynamic adjustments.

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3. Key Performance Parameters

【表格】

Parameter Typical Range/Value

Control Signal 0-10V DC / 4-20mA Current

Response Time ≤50ms (from signal input to spool movement)

Hysteresis ≤3% (deviation between input signal and output flow)

Repeatability ±1%

Rated Flow 4-60 L/min (model-dependent)

Max. Working Pressure 350 bar (up to 420 bar for some models)

Leakage ≤50 ml/min (internal leakage)

Operating Temperature -20°C to +80°C (special models support -40°C)

Protection Grade IP65 (dust and water-resistant)

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4. Functional Features

• Proportional Control: Linear relationship between spool displacement and input signal for stepless speed/pressure adjustment.

• High Dynamic Response: Rapid adaptation to signal changes, suitable for frequent start-stop or variable-load conditions.

• Energy Efficiency: Flow regulation reduces energy loss and system heating.

• Strong Contamination Resistance: Wear-resistant spool and filtration design accommodate moderately contaminated hydraulic oil.

• Modular Design: Integrates directional, flow, and pressure control functions.

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5. Selection Guide

5.1 Define Control Requirements

• Directional Control: Select proportional directional valves (e.g., HM3-4-3WZ).

• Flow Control: Choose proportional throttle valves (e.g., HM3-4-2F).

• Pressure Control: Opt for proportional relief valves (e.g., HM3-4-1P).

5.2 Match System Parameters

• Flow Demand: Select port size based on the maximum flow of actuators (cylinders/motors).

• Pressure Demand: Ensure rated pressure ≥ system maximum working pressure + safety margin (typically +20%).

• Signal Type: Verify compatibility between controller output (voltage/current) and valve input.

5.3 Environmental Adaptability

• High-Temperature Environments: Use high-temperature seals (e.g., fluororubber).

• Low-Temperature Start-Up: Equip with hydraulic oil preheating or low-temperature hydraulic fluid.

• Vibration/Impact: Install vibration-damping mounts (e.g., rubber pads).

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6. Installation and Commissioning

6.1 Installation Tips

• Orientation: Align hydraulic ports with system piping to avoid reverse installation.

• Electrical Connections: Use shielded cables to minimize electromagnetic interference and ensure proper grounding.

• Dust/Water Protection: Add protective covers for outdoor or dusty environments.

6.2 Commissioning Steps

1. Zero Adjustment: Set initial spool position via debugging software or manual knob.

2. Signal Calibration: Verify linear spool travel by inputting minimum/maximum signals.

3. Dynamic Testing: Simulate actual operating conditions to check response speed and stability.

4. Parameter Optimization: Adjust PID settings (closed-loop models) to reduce overshoot or oscillation.

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7. Common Faults and Troubleshooting

【表格】

Symptom Possible Causes Solutions

No Operation Power disconnected, signal wire broken Check power and signal connections

Sluggish Response Solenoid coil failure, spool jamming Replace coil or clean spool

Unstable Flow Signal interference, oil contamination Shield signal lines, replace oil/filter

Excessive Leakage Seal degradation, valve body cracks Replace seals or repair valve body

High Noise Cavitation, spool vibration Adjust supply pressure, add damping structure

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8. Alternative Model References

If the HM3-4 Banks model is unavailable, consider these similar products:

• Rexroth 4WRPEH Series: High-performance proportional valves with CAN bus communication.

• Parker PGP Series: Compact proportional valves for mobile equipment.

• Atos AGAM Series: Explosion-proof design for hazardous environments.

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9. Maintenance Recommendations

• Filter Replacement: Replace filters every 500 operating hours to maintain oil cleanliness (≤ NAS 6).

• Spool Lubrication: Disassemble and clean every 2000 hours, applying dedicated grease.

• Storage Conditions: Coat ports with anti-rust oil and store in a dry, ventilated area for long-term storage.