Fully metal to metal butterfly valve
Body:WCB; Disc: SS316, Stem: SS316. Seat: Overlay STL
Test / Inspection:
API 598/ISO 5208
Face To Face:
PS: We also can do according to customer's requirements.
DBV fully metal to metal sealing
Its advantages are anti-wear, anti-erosion and long service life,etc. DBV butterfly valve suitable for mant poor
working conditions such as high pressure and high temperature.
Renewable seat and seal ring
The design of renewable seat and seal ring could avoid the valve damaged caused by the wear of
seal ring and reduce the cost of use
Two directional flow
The pressure of bidirectional flow could be afforded to
achieve no flow restrictions on the installation.
DBV VALVE CO., LTD is manufacturer of valves.
Email: info[email protected]
Wenzhou Factory :No.96 Fanhua East Road,OuBei,WenZhou,Zhejiang,China,325102
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The first eccentricity:
The deviation between stem rotation center and the seat centerline ensures a tight seal between the seat and disc.
The second eccentricity:
The deviation between sealing cone center and the valve centerline, when the valve opens, can make the butterfly plate leaves sealing surface quickly.
The third eccentricity:
The deviation between sealing cone center and the valve centerline, when the valve opens or closes, can eliminate the friction between the disc sealing surface and seat.
Design and Manufacture Standard:
Inspection Test Standard:
Material Pressure-temp. Standard:
Size≤24” according to ANSI B16.5
Face to Face:
Flange Short Pattern to ISO5752 Basic Series 13
Size≥24” according to ANSI B16.47 Series B
Flange Long Pattern to ASME B16.10
Fire Safe Standard:
Testing Pressure at Constant Temp.(MPa)
Design and Manufacture Standard:
Testing Pressure at Constant Temp.（MPa）
PS: We also can make according to customer's requirements.
Triple eccentricity refers to an angle eccentricity added on the basis of the double eccentric structure, as the butterfly valve sealing surface shows an oblique cone. This structure is characterized by the outer side of the disc to be processed into an oblique cone, and also the inner side of the sealing seat is processed into an oblique cone. At this time, the section of the valve sealing surface the becomes oval, thus the shape of the disc sealing surface is under the vertical asymmetry. Because the sealing surface is the oblique cone, the large part of the disc separated by the stem shaft presses the seat upwards along the large inclined surface, and the large part of the disc presses the seat downwards along the small inclined surface. The seal between the disc sealing ring and the seat does not rely on the elastic deformation of the seat, but completely depends on the compact of the touching surface. So there is no friction in the process of the triple eccentric butterfly valve basically opening and closing, and the valve closes tightly with the closing pressure increasing. It is obvious from the principle and structure of the triple eccentric butterfly valve, the triple eccentric butterfly valve has the following advantages:
1) The sealing performance and reliability of the system are improved.
2) The friction is low, and the valve opening and closing flexibly.
3) The valve service life is longer and it could switch repeatedly.
4) The resistance of pressure and high temperature is improved, and the range of applications is wide.
1. DBV butterfly valve is characterized by simple structure, small volume and light weight, and it is easy to install and adjust.
The valve is widely used in the medium and low pressure pipeline.
2. Good sealing performance，corrosion resistance，high pressure and temperature resistance, smart control and safe use.
3. The unique design of triple eccentricity makes no friction between the sealing surface and extend the valve service life.
4. The elastic seal is produced by the torque.
5. The wedge design makes the valve close more and more tightly by automatic sealing function, and there’s compensation
and zero leakage between the sealing surfaces.
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