Manual Flange Butterfly Valve

  • Detail
  • Parameters
Caliber
DN50~DN2000(mm)
Conveyed medium
Water, air, natural gas, oil products, and weakly corrosive fluids.
Pressure range
0.9~2.4MPa
Operating temperature
Nitrile rubber: -40℃~90℃ Fluororubber: -20℃~200℃
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自由容器
Soft-sealed centerline wafer butterfly valves and double-eccentric flanged butterfly valves feature compact structures, smooth 90° rotation for easy operation, reliable sealing, and long service lives. They are widely used in water supply and drainage systems of water treatment plants, power plants, steel mills, paper mills, chemical industries, food and beverage sectors, etc., for flow regulation and on-off control.
自由容器-副本3
Features
1.This valve features a double-eccentric structure, ensuring a tighter seal as it closes, with reliable sealing performance.
2.The sealing pair materials are stainless steel and oil-resistant nitrile rubber, offering a long service life.
3.The rubber sealing ring can be located on either the valve body or the disc, making it adaptable to different media characteristics for user selection.
4.The disc uses a frame structure, providing high strength, large flow area, and low flow resistance.
5.The overall baking finish effectively prevents corrosion. By replacing the sealing material of the valve seat, it can be used with different media.
6.This valve has bidirectional sealing capabilities, allowing installation without being restricted by media flow direction or spatial position. It can be installed in any orientation.
7.The valve has a unique structure, with flexible, labor-saving, and convenient operation.
Parameters
Nominal Diameter DN(mm)50~200050~1600
Nominal   Pressure PN(MPa)0.611.6
Sealing   Test(MPa)0.661.11.76
Strength   Test(MPa)0.91.52.4
Service   TemperatureNBR:   -40℃~90℃
VITON: -20℃~200℃
Applicable   MediaWater,   air, natural gas, oil, and weak corrosive fluids
Leakage   RateComplies   with GB/T13927-92 standard
Actuation   ModesWorm   gear drive, electric, pneumatic, hydraulic
Selection
Part NameMaterial
Valve BodyWCB, QT450-10, HT200, HT250
DiscWCB, QT450-10, HT200, HT250
Shaft2Cr13
Sealing RingOil-Resistant NBR
PackingFlexible Graphite
Dimensions
DNLHH2ABФD
504322477267112.5106
654624085267123124
804627995267138162
10052286105267150162
12556329129345168192
15056354132345190216
20060438165353227.5270
25068493197353251326
30078570234380284.5376