Q
How does the solenoid shut-off valve work under normal operating conditions?
Under normal operating conditions, the valve remains in the open position without requiring any power supply. It only closes when it receives a shut-off signal, such as a DC pulse voltage triggered by a gas leak alarm, making it energy-efficient and reliable for daily use.
Q
What triggers the valve to close automatically?
The valve closes automatically when the connected alarm system detects a gas leak and sends a DC pulse voltage to the solenoid coil. This energizes the coil and drives the valve to close quickly, cutting off the gas supply and entering a self-locking state.
Q
How long is the DC pulse voltage released by the alarm's capacitor?
When a gas leak is detected, the alarm's capacitor continuously releases a 3-second DC pulse voltage. This duration is sufficient to fully energize the coil, close the valve, and lock it in the closed position to prevent further gas flow.
Q
How can the valve be reopened after it has been closed and self-locked?
After the valve enters the self-locking state following a closure, it can only be reopened through manual operation using the Reset Device (component #6). Once manually reset, the valve returns to the open position and is ready to close again upon the next shut-off signal.
Q
What is the role of the permanent magnet and spring in the valve mechanism?
The valve's operation is based on the interaction of three forces: the instantaneous electromagnetic force from the coil, the permanent magnetic force, and the spring force. Together, these forces enable pulse-driven valve closing, automatic self-locking, and manual reopening — ensuring reliable and precise control without continuous power.
Q
What are the main structural components of this solenoid shut-off 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 component plays a critical role in ensuring safe, efficient, and durable gas shut-off performance.
