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1. Working principle of direct-acting gas solenoid valve
The direct-acting gas solenoid valve is the same as the ordinary solenoid valve. When the solenoid coil is energized, the electromagnetic force lifts the seal from the valve seat, and the valve opens. When the solenoid valve coil is de-energized, the electromagnetic force disappears, and the seal return to its original position.
2. Working principle of pilot gas solenoid valve
When the pilot gas solenoid valve is energized, the pressure in the upper chamber drops rapidly, and a pressure difference between upper and lower sides is formed around the closure. The fluid pressure pushes the closure to move upward and the valve opens; when the power is off, the spring force closes the pilot hole, and the inlet pressure passes through The bypass hole agile chamber forms a low-low and high-pressure pressure difference around the valve closing member, and the fluid pressure pushes the closing member to move downward to close the valve.
3. Working principle of city gas solenoid valve
When the city gas solenoid valve is energized with the normal ventilation solenoid head, the valve stem will be locked by the solenoid head, and the valve is in the open state at this time. When the gas pipeline or gas equipment leaks, and the mixed concentration of gas and air reaches 25% of the lower limit of the explosion limit, the detector sends a signal to the controller, and the controller sends out sound and light alarms, turns on the exhaust fan, and cuts off the current 220V solenoid control. The voltage drives the electromagnet to release the valve stem of the safety valve. Under the action of the spring and its own weight, the valve stem falls rapidly, and the valve port is closed to cut off the air source. After the power is cut off, the shut-off valve cannot be opened manually due to self-locking.
4. Working principle of distributed direct-acting gas solenoid valve
After the distributed direct-acting gas solenoid valve is energized, the electromagnetic force directly lifts the pilot valve and the main valve closing piece upward in turn, and the valve opens. When the inlet and outlet reach the starting pressure difference, after the power is turned on, the electromagnetic force pilots the small valve, the pressure in the lower chamber of the main valve rises, and the pressure in the upper chamber drops, so as to use the pressure difference to push the main valve upward; when the power is off, the pilot valve uses a spring Force or medium pressure pushes the closure, moving down, closing the valve
