MAIN TECHNICAL PARAMETERS
Stainless steel material with counterweight adjustment, valve pressureresistance approx. 3000-5000 Pa, flange spacing L=200mm.

STRUCTURE
Composed of main components: flange, valve body, valve disc, valve shaftand counterweight block. The flange width can be customized as percustomer requirements, with a standard width of 30-50mm. Asquare-to-round multi-blade structure shall be adopted when thediameter exceeds Φ800.

PERFORMANCE
The valve stays normally open for ventilation during normal operation.When the pipeline fan shuts down, the valve disc closes to prevent reverseair flow, and the resistance of the valve disc can be adjusted by adjustingthe position of the counterweight block.