The disc is driven by the stem and can be opened and closed once if it is rotated 90°.The flow of medium can be controlled by changing the deflection Angle of the butterfly plate.
Commonly used butterfly valves are sandwiched butterfly valve, lug butterfly valve and flange butterfly valve.Butterfly valve is suitable for the production of furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection, building water supply and drainage and other engineering systems to transport a variety of corrosive, non-corrosive fluid medium pipeline, used for regulating and cutting off the flow of medium.
Structural features
The
valve adopts three eccentric structure, namely in the common metal hard
seal double eccentric butterfly valve on the basis of an Angle
eccentric.
This Angle is the main purpose of eccentric valve in the
process of opening or closing action, any point between the sealing ring
and valve seat can quickly release or contact, achieve the seal between
the real "friction-free" greatly prolong the service life of the valve,
metal hard seal butterfly valve adopts the dynamic balance "radial
sealing system,"
Through optimizing design, on both sides of the
import and export of butterfly plate stress approximate balance,
reliable sealing performance of the valve to import and export at the
same time, effectively reduce the valve of the open torque (about
two-thirds of normal butterfly valve) butterfly plate sealing ring by
sheets of stainless steel materials such as graphite, carbon fiber and
PTFE compound and into, give priority to sealed stainless steel sheet,
non-metallic interlining for auxiliary seal, this kind of dual sealing
structure, make more reliable valve seal, seal leakage registered to
ANSI B16.104 grade V or ISQ5208 A level.
Butterfly plate sealing ring
is made of graphite/carbon fiber /PTFE and other sandwich materials.
Compared with the rubber asbestos plate of ordinary butterfly valve, it
is more environmentally friendly, more wear-resistant, more scour
resistant and more reliable. It can be opened and closed for 100,000
times without failure.
Replaceable seat/sealing ring design for easy field maintenance of valve;
According to the actual working conditions of the product, the valve plate material selection and sealing structure of a variety of optimal configuration, to meet the customer's different needs for product performance.
The bracket connected with the driving device conforms to the IS05211 standard, and can be connected with various electric, pneumatic, hydraulic, manual and other driving devices.
High performance packing seal
Combined packing sealing system is adopted to ensure the maximum leakage rate of valve ≤20ppm.
Dynamic load sealing structure can be selected to make packing durable seal and extend packing maintenance free period.
The stem may be designed to be blowout proof in accordance with AP11609.
Design and manufacturing: JB/T8527, GB/T1224, API609, ASME B16.34, etc
Connection flange: GB/T91113.1~9113.4, ASME B16.5, ASME B16.74 and other standards
Structure length: GB/T1221, API609, ISO5752
Test and inspection: JB/T9092, GB/T26480, API598, ISO5208, etc
Nominal size: DN50~DN3600mm 2"~144"
Nominal pressure: PN2.5~PN260 Clas150~Class1500
Applicable temperature: -196℃~600℃
Main
materials: carbon steel, molybdenum steel, Austenitic stainless steel,
duplex stainless steel, titanium alloy, Hahn alloy, Monel alloy, etc
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