Square Ventilation Butterfly Valve is a specialized flow control device designed with a full square structure,specifically tailored to match square ventilation pipelines.It is 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.Widely applied in factory workshops,clean rooms,environmental protection equipment,and civil buildings with square pipelines,it becomes an essential accessory due to its perfect fit,no material accumulation,and easy installation.

Unlike round ventilation butterfly valves,this square type features a fully square valve body and butterfly plate,which perfectly aligns with square pipeline cross-sections.This design eliminates the need for transition adapters,greatly simplifying installation,saving layout space,and reducing installation costs.The square structure also ensures no dead corners inside the valve,effectively avoiding material accumulation and dust deposition—a key advantage for dust-laden gas and high-demand ventilation scenarios.

The valve is composed of a square valve body,square butterfly plate,valve stem,and operating mechanism(manual,electric,or pneumatic optional).The square butterfly plate is precision-machined to fit closely with the valve body,capable of rotating 0–90 degrees freely to achieve stepless air volume adjustment or full on-off control.The sealing structure adopts high-quality soft seal(EPDM,PTFE)or metal hard seal,ensuring excellent airtightness,preventing air leakage,flue gas backflow,and dust overflow,thus maintaining the stability and efficiency of the ventilation system.

Material selection is flexible to adapt to different working conditions:standard carbon steel for general ventilation scenarios,ensuring sturdiness and durability;304/316L stainless steel for humid,slightly corrosive,or clean occasions(such as clean rooms,food processing auxiliary ventilation),enhancing corrosion resistance and hygiene performance;high-temperature resistant alloy plates for high-temperature flue gas(up to 450°C),suitable for harsh industrial environments.

With a simple structure,few wearing parts,reliable operation,and low maintenance cost,the square ventilation butterfly valve is widely used in square ventilation pipelines such as factory ventilation and exhaust,workshop dust removal,clean room HVAC systems,environmental protection dust removal equipment,and building ventilation.Its square design perfectly matches the needs of square pipeline systems,making it the preferred flow control valve for scenarios requiring no dead corners and easy installation.