MAIN TECHNICAL PARAMETERS
Carbon steel material with counterweight adjustment, valvepressureresistance: 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 according tocustomer requirements, with a standard width of 30-50mm.A square-to-round multi-blade structure shall be adopted when thediameter exceeds Φ800.

PERFORMANCE
The valve remains normally open for ventilation under normal conditions.When the pipeline fan stops, the valve disc closes to prevent reverse airflow, and the valve disc resistance can be adjusted by the position of thecounterweight block.