Payment & Shipping Terms:
|Application::||Chlorine-alkali,salt,steel,environmental Protection,food And Medicine||Temperature Of Media::||Medium Temperature|
|Pressure::||Low Pressure, PN 6/PN 10 (150 PSI)||Power::||Manual, Electric, Pneumatic, Hydraulic, Solenoid|
|Valve Body::||WCB, CF8M, CF8||Valve Seat::||PTFE|
|Temperature::||-18℃ ~ +200℃||Connection::||CE ,WRAS,API,OHSAS18001:2007,ISO9001:2015|
Advantages of editing
Fluorine lined butterfly valve, rubber lined butterfly valve, as a kind of components used to realize pipeline system on and off and flow control, has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on.In the known butterfly valve technology, the sealing form of the sealing structure, the sealing material for rubber, ptfe and so on.Due to the limitation of structural characteristics, it is not suitable for high temperature, high pressure and corrosion resistance, anti-wear and other industries.There is a more advanced butterfly valve is the three-eccentric metal hard seal butterfly valve, the body and the valve seat are joined members, the valve seat sealing surface layer surfacing welding temperature resistant, corrosion resistant alloy material.The multi-layer soft folding sealing ring is fixed on the valve plate. Compared with the traditional butterfly valve, this kind of butterfly valve has the advantages of high temperature resistance, light operation, open and close without friction.Valves of this type shall generally be installed horizontally in pipelines.
Features of new high life stainless steel butterfly valve and problems existing in the use of butterfly valve:
1. As the multi-layer hard and soft sealing ring is fixed on the valve plate, when the valve plate is normally open, the media will flush the sealing surface directly, and the soft sealing belt in the metal sheet sandwich will be washed, which will directly affect the sealing performance.
The structure is not suitable for valve with diameter below DN200 due to the thick overall structure of the valve plate and large flow resistance.
Three, because of the principle of rubber butterfly valve lining, the sealing between the sealing surface of the valve plate and the valve seat is to rely on the torque of the drive device to make the valve plate pressure to the valve seat.Positive flow state, the higher the pressure of the medium, the tighter the sealing squeeze.When the flow channel medium countercurrent increases with the medium pressure between the valve plate and the valve seat unit positive pressure is less than the medium pressure, the seal began to leak.
High performance fluorine lined butterfly valve.
Characteristics of the editor
The valve seat sealing ring is characterized in that the two sides of the soft t-ring are composed of multilayer stainless steel sheets.
The sealing surface of valve plate and valve seat is of oblique cone structure.The structure of the spring fixed between the regulating ring presswork and the regulating bolt on the presswork.This structure effectively compensates the tolerance zone between the bushing and the valve body and the elastic deformation of the valve stem under the pressure of medium, and solves the sealing problem of the valve in the process of two-way interchangeable medium transportation.
The sealing ring is composed of multi-layer stainless steel pieces on both sides of soft T type, which has the double advantages of metal hard seal and soft seal. It has the sealing performance of zero leakage no matter in low temperature or high temperature.The test proves that the pressure on the sealing surface is caused by the torque of transmission device and the action of medium pressure on the valve plate when the tank is in positive flow state (the direction of medium flow is the same as that of butterfly plate).Positive medium pressure increases when the valve plate oblique cone surface and valve seat sealing surface squeeze tighter, the better the sealing effect.
When in a countercurrent state, the seal between the disc and seat is pushed against the seat by the drive torque.With the increase of the pressure of the reverse medium, the unit positive pressure between the valve plate and the valve seat is less than the pressure of the medium, the spring of the regulating ring can compensate the tight pressure of the valve plate and the valve seat sealing surface to compensate automatically.
Therefore, unlike the existing technology, the utility model is not installed on the valve plate with multi-layer sealing ring, but directly on the valve body. It is an ideal two-way hard sealing mode to add an adjusting ring between the pressing plate and the valve seat.It can replace gate valve and ball valve.
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