4WRKE 4WREE 4WRZE 4WRKE10 4WRKE16 Series 4WRKE 16 W6-200L-3X/6EG24K31/F1D3M Proportional Directional Valve

1. Technical parameters
As a typical model of the high-pressure proportional directional valve in the 4WRKE series, its parameters are compatible with the requirements of precision hydraulic control systems:
Rated pressure: 31.5MPa (maximum working pressure up to 35MPa), meeting the pressure regulation requirements of medium and high-pressure hydraulic systems.
Flow specification: Nominal flow rate 200L/min (” 200 “in the model represents the flow grade), and it can stably output the corresponding flow rate under the rated pressure.
Control accuracy: The repeat accuracy of valve core displacement is ≤±0.3%, and the flow control deviation is ≤±2%. It is suitable for high-precision speed regulation and positioning scenarios.
Response performance: Step response time ≤50ms (90% response), frequency response ≥10Hz, which can quickly adapt to the dynamic adjustment requirements of the system.
Voltage and current: Rated control voltage DC24V (marked with “24” in the model), control current range 400-800mA, compatible with industrial standard controller output.
Medium and temperature: Compatible with anti-wear hydraulic oil (ISO VG 32/46/68), working temperature range -20 ℃ to 70℃, viscosity adaptation range 10-400mm²/s.2. Product features and advantages
Core features
Electro-hydraulic proportional control structure: It adopts a combined design of proportional electromagnets and hydraulic pilot stages. The displacement of the valve core is continuously regulated by electrical signals to achieve stepless control of flow and direction.
Integrated pressure compensation function: Built-in pressure compensation valve (” K31 “in the model represents compensation module), which can maintain stable flow when system pressure fluctuates and is not affected by load changes.
Dual electric feedback design: Equipped with displacement sensors to achieve closed-loop control of electrical signals, it can correct the position deviation of the valve core in real time and improve the long-term operation accuracy.
Anti-pollution and sealing system: It adopts a combination seal of hardened valve core (surface hardness HRC 58-62) and polytetrafluoroethylene, with an anti-pollution grade reaching ISO 4406 20/18/15, reducing the risk of jamming caused by oil impurities.
Outstanding advantages
Strong flexibility in regulation: The flow rate can be continuously adjusted through 0-10V or 4-20mA signals, which can not only meet the requirements of uniform operation but also adapt to complex action control such as variable speed and buffering.
High operational stability: The pressure compensation function ensures that the flow rate is not affected by load fluctuations. For instance, during the mold closing process of an injection molding machine, it can prevent action lag caused by load changes.
Remarkable energy-saving effect: Compared with traditional on-off valves, by precisely regulating the flow to reduce overflow loss, the system energy consumption can be reduced by 15% to 20%.
Good maintenance convenience: The modular design enables the proportional electromagnet, seals and other vulnerable parts to be replaced separately without disassembling the entire valve body, reducing the maintenance time to less than 2 hours.

3. Usage functions
Direction and flow coordinated control: By adjusting the position of the valve core, the flow direction switching and flow distribution of the hydraulic oil are simultaneously achieved, driving the actuating elements such as the oil cylinder and hydraulic motor to complete actions such as extension, contraction and rotation.
Precise speed control: In conjunction with the analog signals output by the controller, it enables stepless speed regulation of the actuator, such as the feed speed adjustment of the spindle in a CNC machine tool and the smooth lifting and lowering of the crane boom.
Pressure protection and buffering: The integrated pressure compensation module can limit peak pressure and achieve buffering through gradual flow during the start and stop phases of action, reducing the damage to system components caused by hydraulic shock.
System integration and linkage: Supports industrial bus communication such as PROFINET and CANopen (optional for some models), and can be linked with PLC and numerical control systems to achieve precise control of the automated production process.

4. Product detail description
Model decoding “4WRKE” is the series code (4-bore proportional directional valve), “16” represents the valve bore specification, “200” is the nominal flow rate, “3X” indicates that the installation surface complies with the ISO 4401 standard, “24” is the control voltage, “K31” is the pressure compensation mark, and “F1D3M” represents the feedback and installation accessory code.
Material configuration: The valve body is made of forged steel (tensile strength ≥800MPa), the valve core is alloy structural steel, and the proportional electromagnet housing is made of impact-resistant aluminum alloy, suitable for harsh industrial environments.
Physical specifications: Length × width × height approximately 320×180×160mm, weight approximately 12kg, flange installation method adopted, installation hole positions comply with ISO 4401-03 standard.
Accessory configuration: Standard configuration includes a plug-in junction box and a pressure compensation adjustment knob. Optional options include a flow regulation throttle port, a fault diagnosis module, and a bus communication interface.
Protection grade: The electrical part has a protection grade of IP65, which can adapt to industrial site environments such as dust and humidity. The hydraulic interface adopts SAE flange connection, ensuring reliable sealing.

5. Applicable machines and scenarios
Applicable machines
Construction machinery: The boom and bucket arm drive systems of hydraulic excavators, and the luffing and slewing mechanisms of crawler cranes, achieve precise motion control and load self-adaptation.
Industrial machinery: The injection and clamping circuits of injection molding machines, and the clamping and ejection systems of die-casting machines ensure the stability of pressure and speed in the molding process.
Machine tool equipment: The worktable feed system of large CNC floor boring and milling machines, and the slider motion control of presses, meeting the requirements of high-precision positioning and speed regulation.
Energy and heavy equipment: Yaw and pitch hydraulic systems for wind power equipment, roll gap adjustment mechanisms for metallurgical rolling mills, suitable for high reliability and long-term operation requirements.
Applicable scenarios
In the field of precision manufacturing: For automotive parts stamping production lines, proportional control is needed to achieve segmented adjustment of stamping speed and pressure, thereby enhancing the forming accuracy.
Heavy-duty operation scenarios: Hydraulic rock drills in mining operations adapt the drilling speed to different rock strata through stepless flow regulation, reducing equipment wear and tear.
Automated production line: The hydraulic push mechanism of the intelligent logistics sorting equipment is linked with the PLC to achieve synchronous actions and speed matching of multiple workstations.
Outdoor harsh environment: The lifting system of port cranes can still maintain stable proportional control performance in environments with dust and large temperature differences.

6. Relevant models
Model of the same series and the same diameter 4WRKE 16 W6-100L-3X/6EG24K31/F1D3M (100L/min), 4WRKE 16 W6-150L-3X/6EG24K31/F1D3M (150L/min), 4WRKE 16 W6-250L-3X/6EG24K31/F1D3M (250L/min).
Derivative models for different diameters 4WRKE 10 W6-100L-3X/6EG24K31/F1D3M (10 bore), 4WRKE 25 W6-350L-3X/6EG24K31/F1D3M (25 bore), 4WRKE 32 W6-500L-3X/6EG24K31/F1D3M (32 bore).
Special function models: 4WRKE 16 W6-200L-3X/6EG24K31/A1D3M (with alarm output), 4WRKE 16 W6-200L-3X/6EG24K31/F1V (with flow regulation accessory).