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Introduction and installation of ventilation butterfly valve

Dec 23, 2019


Ventilation butterfly valve is used in ventilation, environmental protection engineering, dusty cold air or hot air gas pipelines in chemical, building materials, power stations, glass and other industries. This type of valve should generally be installed horizontally in the pipeline.

It is designed and manufactured by adopting a new structural form in which a mid-line disc plate and a short structural steel plate are welded. The structure is compact, light in weight, easy to install, small in flow resistance, large in circulation, avoiding the effects of high temperature expansion, and easy to operate.
There are no connecting rods, bolts, etc., and the work is reliable and the service life is long. Can be installed in multiple stations without being affected by media flow.

The ventilation butterfly valve is divided into manual and electric transmission, which can be driven by an electric motor or a turbine to drive the actuator to freely rotate the butterfly plate within 90 ° to achieve the purpose of opening and closing or adjusting the medium flow.


Standard
1.Design standard: GB / T12238-1989 JB / T8692-1998
2.Flange connection size: GB / T9115.1-2000
3.Structure length h: GB / T12221-1989
4.Pressure test: GB / T13927-1992; JB / T9092-1999
Parameter
Nominal diameter DN (mm) 50 ~ 2000
Nominal pressure PN (Mpa) 0.05 0.25 0.6
Test pressure Strength test 0.075 0.375 0.9
Leakage test ≤1.5%
Applicable medium Gas, dusty gas, flue gas, etc.
Applicable temperature: minus -10 degrees, plus minus 250 degrees

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