Electro-hydraulic directional valves type WEH use solenoids as pilot control. It is for sub-plate mounting, and its porting patten accords with DIN 24 340 and ISO 4401.
There are many different features and additional device for selection.
Solenoids of pilot valve are wet-pin DC or AC.
The main valve uses spring or hydraulic centered and spring or hydraulic offset. With or without shifting time adjustment; With or without stroke adjustment ; Pre-load valve or throttle insert can be installed in the main valve. Pressure reducing valve can be installed when operating pressure exceeds 25 MPa.
Valves of type WEH are directional spool valves with electrohydraulic operation, using the directional valve as pilot control. They control the start, stop and direction of a fluid flow.
4WEH16-1X Hydraulic Valve Detailed Technical Description
I. Product Overview
The 4WEH16-1X hydraulic valve is a high-performance electro-hydraulic directional control valve designed to control the direction, pressure, and flow of fluid in hydraulic systems. It utilizes solenoids as pilot control components, combined with a hydraulic main valve structure, to achieve precise and reliable fluid control. Its design complies with international standards, offering wide applicability and compatibility.
II. Main Technical Parameters
1. Nominal Diameter: 16mm
2. Working Pressure: Typically up to 35MPa (specific pressure range depends on the model and configuration)
3. Flow Range: Wide flow range based on valve port design and pressure differential, meeting various application needs
4. Control Voltage: DC24V or AC220V (depending on solenoid type)
5. Shifting Time: Adjustable to meet different system requirements
6. Working Medium: Hydraulic oil (must comply with relevant standards, avoid using corrosive or impurity-laden media)
III. Design Features
1. Pilot Control: Employs solenoids as pilot control components for remote and precise control. The solenoids are of the wet-pin DC or AC type, featuring high efficiency and stability.
2. Main Valve Structure: The main valve adopts spring or hydraulic centering, as well as spring or hydraulic biasing, ensuring flexible and reliable spool operation.
3. Adjustment Functions:
• Shifting Time Adjustment: The shifting time can be adjusted by modifying internal valve parameters to suit different system needs.
• Stroke Adjustment: The spool stroke can be adjusted to alter the fluid passage area, enabling flow regulation.
4. Additional Functions:
• Preload Valve or Throttle Insert: Can be installed in the main valve for pressure regulation or throttling control.
• Pressure Reducing Valve: A pressure reducing valve can be installed to protect the system when the working pressure exceeds a certain value.
IV. Application Areas
The 4WEH16-1X hydraulic valve is widely used in various hydraulic systems, such as:
1. Construction Machinery: For controlling hydraulic movements of excavators, loaders, and other construction machinery.
2. Industrial Equipment: In hydraulic equipment for metallurgy, chemical, power, and other industries, for controlling fluid direction, pressure, and flow.
3. Agricultural Machinery: For controlling hydraulic lifting, steering, and other movements of tractors, harvesters, and other agricultural machinery.
4. Other Fields: Also widely used in hydraulic systems for shipping, petroleum, coal, and other industries.
V. Installation and Maintenance
1. Installation:
• Ensure the installation surface is flat, clean, and free of impurities and burrs.
• Connect the oil circuits and electrical circuits correctly according to the markings on the valve body.
• Tighten the fixing bolts evenly to avoid valve body deformation or oil leakage.
2. Maintenance:
• Regularly check the working status of the valve and handle any abnormalities promptly.
• Replace hydraulic oil and filters regularly to keep the oil clean.
• Regularly inspect the solenoids and spool for proper operation, and repair or replace them if necessary.
VI. Precautions
1. Before use, please read the product manual and relevant technical documentation carefully to ensure correct installation and use.
2. During use, comply with relevant safety operating procedures to avoid personal injury and equipment accidents.
3. If the valve requires repair or component replacement, it should be performed by professionals to ensure repair quality and safety.
