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China JYFJS-011 Aluminum Alloy Electromagnetic Shut-off Valve Suppliers - Factory Automated Gas Safety Solutions
This valve is a normally open shut-off valve with a holding control mode. It remains open without power during normal operation and can automatically close upon receiving a shut-off signal. After closing, it can be manually opened and will automatically close again upon receiving another shut-off signal.
When a leakage accident occurs, the alarm system sounds an alert, instantly providing a DC pulse voltage to the solenoid valve. The coil is energized, driving the valve to quickly close, cutting off the gas source and entering a self-locking state.
When a gas leak occurs, the alarm's capacitor continuously releases a 3-second DC pulse voltage, energizing the coil, closing the valve to cut off the gas supply, and entering a self-locking state.
The interaction of instantaneous electromagnetic force of the coil, permanent magnetic force, and spring force is used to achieve pulse drive, automatic valve closing, and manual valve opening self-holding functions.
| No. | Component Name |
|---|---|
| 1 | Valve body |
| 2 | Diaphragm |
| 3 | Valve cover |
| 4 | Spring |
| 5 | Actuator |
| 6 | Reset Device |
| 7 | Dust cover |
| 8 | Moving iron core |
| 9 | Sealing ring |
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Q What is the normal operating state of this solenoid shut-off valve?This valve is a normally open shut-off valve. It remains fully open without any power supply during normal operation, ensuring uninterrupted gas flow. It only closes when it receives an electrical shut-off signal from an alarm system.
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Q How does the valve respond when a gas leak is detected?Upon detection of a gas leak, the alarm system instantly delivers a DC pulse voltage to the solenoid coil. The coil energizes, driving the valve to close rapidly, cutting off the gas supply, and entering a self-locking state to prevent accidental reopening.
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Q How long is the DC pulse voltage released by the alarm capacitor?When a gas leak occurs, the alarm's capacitor continuously releases a 3-second DC pulse voltage. This is sufficient to energize the solenoid coil and fully close the valve, locking it in the closed position.
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Q Can the valve be reopened after it has been closed by the alarm?Yes. After the valve has closed and entered its self-locking state, it can be manually reopened. However, it will automatically close again upon receiving the next shut-off signal from the alarm system.
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Q What forces are involved in the valve's self-holding mechanism?The valve's self-holding mechanism relies on the interaction of three forces: instantaneous electromagnetic force from the solenoid coil, permanent magnetic force, and spring force. Together, these enable pulse-driven closing, automatic shut-off, and manual-open self-holding functionality.
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Q What are the main structural components of this valve?The valve consists of 9 key components: Valve body, Diaphragm, Valve cover, Spring, Actuator, Reset Device, Dust cover, Moving iron core, and Sealing ring. Each part plays a critical role in ensuring reliable sealing, actuation, and reset performance.