VHK2A-12F-03S: SMC Manual Valve, the Convenient Control Expert for Industrial Automation
2026-01-12
Introduction
The VHK2A-12F-03S is a manual valve manufactured by Japan’s SMC Corporation, belonging to the VHK-A series. This manual valve features a poppet structure, offering light operation, a large effective cross-sectional area, and a compact design. It is widely used in industrial automation control systems, providing precise pneumatic circuit control solutions for equipment.
Core Product Advantages
- Intuitive Operation Design The open/closed status of the valve can be clearly identified by the knob’s rotation direction. The handle is designed to prevent accidental detachment. The operation is simple and intuitive, facilitating quick identification and manipulation.
- Large Effective Cross-Sectional Area The effective cross-sectional area is 2.0~17.5 mm², ensuring smooth gas flow. Suitable for high-flow pneumatic control requirements.
- Poppet Valve Structure Employs a poppet structure that is resistant to sealing failure. It features excellent sealing performance, rarely experiences sealing issues, and ensures long-term stable operation.
- Low Operating Force Design The operation is light and requires minimal force, reducing operator fatigue and enhancing operational convenience.
Technical Specifications
| Parameter Item | Specification | Description |
|---|---|---|
| Series | VHK-A Series | Product Series |
| Valve Type | 2-Port Valve | Valve Type |
| Port Size | 12F (Φ12mm) | Pneumatic Port Specification |
| Knob Color | Gray | Standard 2-Port Valve Color |
| Operating Fluid | Air | Working Medium |
| Maximum Operating Pressure | 1.0 MPa | Max. Working Pressure |
| Proof Pressure | 1.5 MPa | Pressure Resistance |
| Ambient Temperature | 0~60 °C | Operating Temperature Range |
| Operation Angle | 90° | Operation Angle |
| Effective Cross-Sectional Area | 2.0~17.5 mm² | Flow Characteristic |
Model Breakdown
- VHK2A: SMC Manual Valve Series Code, VHK-A Series
- 12F: Port Size Φ12mm
- 03S: Piping Specification, Port Size Rc3/8
Working Principle
The VHK2A-12F-03S utilizes a poppet valve structure. When the knob is manually rotated, the valve stem drives the valve core, changing the open/closed state of the internal passage within the valve body, thereby controlling the on/off flow of compressed air. The knob’s rotation direction corresponds to the valve’s open/closed state, allowing operators to quickly identify the valve’s status. The poppet valve structure design ensures excellent sealing performance, effectively preventing air leakage.
Typical Application Scenarios
- Industrial Automation Production Lines Used in automated production lines (e.g., automotive manufacturing, electronics) for on/off control of pneumatic systems. Enables pushing, positioning, clamping, and handling of workpieces, improving production efficiency and product quality.
- Packaging Machinery Controls actions like material conveying, sorting, and marking in packaging machines. The manual valve enables rapid switching of pneumatic circuits, ensuring precision and stability in the production process.
- Pneumatic Slides for Cleanrooms Provides precise pneumatic control for pneumatic slides in cleanroom environments such as semiconductor manufacturing and biopharmaceuticals, ensuring stable equipment operation in controlled environments.
- Laboratory Equipment Used for controlling pneumatic actuators in laboratory automation equipment, enabling gripping, positioning, and placing of samples, thereby improving experimental accuracy and efficiency.
Installation and Usage Precautions
- Installation Requirements The manual valve should be installed on a flat, stable base to ensure stable operation. Before installation, check that the air supply pressure meets requirements and ensure the air source is clean. Pay attention to the valve’s inlet/outlet direction during installation to ensure correct pneumatic circuit connection.
- Operating Environment The operating temperature range is 0~60°C. Avoid use in extremely high or low-temperature environments. Maintain relative humidity within an appropriate range to prevent moisture from affecting equipment lifespan. The operating medium should be filtered before use.
- Operation Standards When operating the valve, open and close it gently and evenly. Do not use impact force to operate the valve. When operating multiple valves simultaneously, pay attention to the sequence of operation, which should comply with process requirements. This ball/stop valve is designed for fully open or fully closed positions only; it is strictly prohibited to use it for throttling or flow regulation.
- Regular Maintenance Periodically inspect the manual valve’s connecting pipes and fittings to ensure no leaks. Regularly clean the valve surface. Periodically check the valve’s operational performance to ensure long-term stable operation.
- Safe Operation Ensure the equipment is properly grounded before operation to prevent electric shock. Avoid contact with moving parts during operation to prevent injuries. In case of equipment malfunction, stop immediately and have it repaired by qualified personnel. Depressurize before installation to avoid injury from high-pressure media discharge.
Conclusion Summary
The VHK2A-12F-03S manual valve is the “convenient control expert” in the field of industrial automation. It perfectly combines intuitive operation, a large effective cross-sectional area, and a poppet valve structure, providing an efficient, reliable, and convenient pneumatic circuit control solution for various industrial applications.
Choosing VHK2A-12F-03S means choosing to drive your automation system towards higher efficiency with high reliability and convenience!
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