Round Ventilation Butterfly Valve is a common and practical flow control device,specially designed with a full circular structure to perfectly match round ventilation pipelines,mainly used for regulating air volume,isolating and cutting off air,flue gas,and dust-laden gas in ventilation,dust removal,HVAC,and industrial ventilation systems.It is widely applied in factory workshops,power plants,metallurgy,chemical industry,environmental protection,and civil buildings,becoming an essential accessory for round pipeline ventilation systems due to its high adaptability and simple operation.

The valve features a compact and reasonable circular design,with the valve body,butterfly plate,and pipeline perfectly matched in shape,which not only reduces airflow resistance and ensures smooth air circulation but also simplifies installation.Unlike other irregular valve structures,the round ventilation butterfly valve can be directly connected to round pipelines without additional transition adapters,saving installation time,space,and cost.The valve body adopts a wafer-type or flange-type connection,light in weight,easy to disassemble and maintain,suitable for various round pipeline specifications(DN50–DN1200,customizable).

In terms of structure,it consists of a round valve body,circular butterfly plate,valve stem,and operating mechanism(manual,electric,or pneumatic optional).The circular butterfly plate is precision-machined,closely fitted with the valve body,and can rotate 0–90 degrees freely to realize stepless adjustment of air volume or full on-off control.The sealing structure adopts high-quality soft seal(EPDM,PTFE)or metal hard seal,with excellent airtightness,effectively preventing air leakage,flue gas backflow,and dust overflow,ensuring the stability and efficiency of the ventilation system.

Material selection is flexible according to working conditions:standard carbon steel for general ventilation scenarios,ensuring sturdiness and durability;304/316L stainless steel for humid,slightly corrosive,or clean occasions,enhancing corrosion resistance and hygiene performance;high-temperature resistant alloy plates for high-temperature flue gas(up to 450°C),adapting to harsh industrial environments.The valve has a simple structure,few wearing parts,reliable operation,and low maintenance cost,avoiding faults caused by complex components.

It is widely used in round ventilation pipelines such as factory ventilation and exhaust,workshop dust removal,central air conditioning(HVAC)systems,small boiler flue gas discharge,and environmental protection dust removal equipment.With its perfect round structure,high adaptability,and cost-effectiveness,it is the preferred flow control valve for round pipeline ventilation systems,meeting the basic control needs of various ventilation scenarios.