Product performance:

1. It is normally open at ordinary times. In case of fire, the smoke (temperature sensor) sends an electrical signal (DC24V) through the control center, and the electromagnet in the mechanism is energized to automatically close the valve and output an electrical signal for closing.

2. The valve can be closed manually or by the action of 70°C temperature sensor.

3. The valve has six gears to manually adjust the opening of air volume.

4. Manual reset after valve action.

Product structure:

Main components: valve body, blade, shaft, bushing, temperature sensor, actuator, stainless steel spring plate, torsion spring, etc.

The maximum manufacturing size of the valve: 1200X 800 The torsion of the torsion spring of the actuator can be adjusted in three steps to match the size of the air duct, and the flange size is the same as that of the metal rectangular air duct in GB50234-2002.