Three eccentric metal seal flange butterfly valve series is a long life, energy saving butterfly valve, its structure adopts the three-dimensional eccentric principle design, the valve seat adopts hard and soft seal compatible multi-level structure or all-metal seal structure, is a kind of high performance butterfly valve products can be used in high temperature and high pressure environment. This product is widely used in metallurgy, steel, electric power, petroleum, chemical industry, heating, air, gas, combustible gas, municipal water supply and water supply and drainage and other corrosive medium pipeline, as the cut-off or adjust the medium flow. Three eccentric butterfly valve as the crystallization of the latest technology of the valve, lift the length of all kinds of valves, avoid all kinds of short valves, to clamp, lug, flange, ring, butt welding, jacket and other structural lengths can be corresponding. Due to the large choice of materials, high and low temperature and a variety of acid, alkali and other corrosive media can also correspond to freely. Especially in the large diameter, with the advantage of zero leakage, the shutoff valve is constantly replacing the thick gate valve and ball valve; Similarly, its excellent control function in the control valve is also constantly replacing the heavy stop valve.
High-performance three-dimensional eccentric patent type sealing system: for laminated valve ring: bi-directional zero leakage seal (according to German standard 1 or American standard Ⅵ), for integral valve ring: bi-directional tight seal (according to American standard Ⅴ).
1. Excellent gas and liquid isolation function and flow regulation characteristics
2. Weld-in stainless steel or surfacing type Sentae carbide valve seat is particularly suitable for long life use
3. Valve seat opening and closing without friction, wear, no lag (only tight pressure)
4. Easy to change and adjust the sealing performance of the seal ring
5. Suitable for high temperature, high pressure and corrosive and other harsh working environment
6. Metal/metal hard seal up to +600℃
7. Self-compensation process temperature changes.
8. Low operating torque and reliable torque shutdown
9. Essential fire safety design
10. Butterfly plate seal, along the circumference of the uniform compression, welding like the effect, so that the sealing ring bending, acting like a spring. Elastic seal ensures "zero leakage" of liquid or gas to API 598 - Elastic Seat standards. The elasticity of the seal allows the disc to maintain a closed air tight seal during the thermal cycle as shown in the picture.
The eccentric 1 valve shaft is located behind the seat shaft so that the seal is completely tight around the entire seat.
The center line of the eccentric 2 valve shaft deviates from the pipe and valve center line, which is free from the interference of valve opening and closing.
The eccentric 3 seat cone shaft deviates from the center line of the valve shaft to eliminate friction during closing and opening and to achieve a uniform and consistent compression seal around the entire seat.
