Purpose: The device can be widely used in purification workshops or clean rooms to maintain the positive pressure difference between indoor and outdoor, so as to discharge excess indoor air and prevent the intrusion of outdoor air.

Material: Galvanized steel sheet/cold rolled sheet.

Function:

1. The installation form is wall-mounted, and the wall thickness can be adjusted arbitrarily within 30-50mm.

2. The position of the heavy hammer can be adjusted according to the air volume and pressure difference requirements.

3. It has the advantages of flexible rotation, tight closing, convenient adjustment, and no energy consumption.