FREE-Valve Brand Pneumatic Square Butterfly Valves are known as ventilation butterfly valves . The ventilation butterfly valve is used in the cold air or hot air gas pipelines containing dust in the ventilation and environmental protection projects in the chemical industry, building materials, power stations, glass and other industries, as a pipeline control device for regulating the flow rate or cutting off the gas medium. This type of valve should generally be installed horizontally in the pipeline.
Features:
1)It is designed and manufactured by using the new structure form of welding between the center lined type butterfly disc and the short structure steel plate. It has the advantages of compact structure, light weight, easy installation, small flow resistance, large circulation, avoiding the influence of high temperature expansion and light operation.
2)Designed with out connecting rod and bolt. It can be installed in double direction , not affected by the flow of media.
Technical Specification:
1)Size Range: 100*100 to 1600*1600
2)Pressure Range: Class 150 /PN6 /PN10
3) Applicable Temperature: 0~200ºC
4) Connection Type: Flange
5) Sealing material: Rubber,PTFE,Metal seal
6) Body Material: Carbon steel,stainless steel
7) Disc material:Stainless steel
8) Pressure test:GB/T13927, API598
9) Face to Face: GB/T12221, API609
10) Valve body : GB/T12224,ASME B16.34
11)Operating Mode: Pneumatic
Application:
Square Type Ventilation Butterfly Valve is a non-sealing butterfly valve, widely used in building materials, metallurgy, mining, electric power and other production process medium temperature ≤300ºC nominal pressure of 0.1Mpa on the pipeline, used to connect, open and close or adjust the medium quality.
Audited Supplier 
){kind=link}