purpose

Applied to the through wall ducts of ventilation and air conditioning systems with fire prevention requirements, to prevent the spread of fire along the air ducts.

function

Normally open, the 70 ℃ fuse will activate and the valve will automatically close.

Manually turn on or reset.

Adjust the air volume in five levels within the range of 0-90 °.

Output valve closing signal, whether to output signal according to user needs.