Teiple-eccentric Metal To Metal Seal Butterfly Valve Geometric design

Release time:

2024-03-28

Teiple-eccentric Metal To Metal Seal Butterfly Valve Geometric design Eccentricity 1: Eccentricity E of axis of valve shaft to sealing center line Eccentricity 2: Eccentricity F of Valve Shaft Axis to Pipeline Axis Eccentricity 3: Angular eccentricity of seat axis to pipeline axis a

Overview and Use

Tri-eccentric metal-sealed butterfly valves are long-life and energy-saving butterfly valves. Their structures are designed on the basis of three-dimensional eccentricity principle, and their seats are multi-level structures compatible with hard and soft seals or all-metal seals. They are high performance butterfly valves that can be used in high temperature and high pressure environments. This product is widely used in metallurgy, steel, power, petrochemical, heating, air, gas, combustible gas, municipal water supply, water supply and drainage and other corrosive media pipelines, as a cut-off or regulating medium flow.

Tri-eccentric butterfly valve, as the crystallization of the latest technology of valve, lifts the advantages of various valves, avoids the shortcomings of various valves, can correspond to the jacket lugs, flanges, ring butt welding, jackets and various structural lengths, and corrosive media such as acid and alkali can also correspond freely because of its wide choice of materials, high and low temperatures and various acids. In the aspect of large caliber, it is replacing the bulky gate valve and ball valve constantly with its advantage of zero leakage on the shutoff valve; similarly, its excellent control function is replacing the bulky globe valve continuously on the control valve.

Characteristics and advantages

1. High Performance Patented Three-Dimensional Eccentric Sealing System

For laminated valve rings: bidirectional zero leakage seal (according to grade 1 of German Standard or VI of American Standard) for integral valve rings: bidirectional tight seal (according to grade V of American Standard)

2. Excellent gas and liquid isolation function and flow regulation characteristics

3. Welded stainless steel or surfacing Stellite carbide valves are especially suitable for long-life use.

4. Opening and closing of valve seat without friction, abrasion and sticking (only tight pressure)

5. Sealing rings that are easy to replace and adjust sealing performance

6. Suitable for harsh working conditions such as high temperature, high pressure and corrosiveness.

7. Hard metal/metal seals up to + 600'C

8. Temperature change in self-compensating process.

9. Low Operating Torque and Reliable Torque Turn-off

10. Essential Fire Safety Design

Design of Seat Sealing System

1. Laminated secondary seal rings (up to + 500%C)

The laminated seat ring is made of multi-layer stainless steel ring clamped with graphite sealing material. This structure makes the seat ring elastic enough to produce uniform contact with the seat throughout the circumference. This ensures a two-way zero leakage seal. Laminated seat rings are replaceable, easy to center on the valve plate and fit with the seat.

2. Block seat ring (up to + 6000C)

Block seat rings are made of solid heat-resistant stainless steel rings. It has precisely machined edges and is tightly bonded to the seats of the surfacing Stellite cemented carbide. It is easy to replace.

3. Floating Design of Seat Ring

Laminated or integral seat rings are mounted on the valve plate and are maintained by bolted seamless retaining rings, but there is no strong connection between them. In addition, the seat ring is supported by stainless steel/graphite coiled flexible gaskets. This floating design eliminates friction on the seat ring and changes in the temperature of the self-compensating process.

4. Optimum closure angle

The closing angle is the tangent of the seat and the movement of the valve plate when the valve is in the closing position.

The angle of the tangent of the trajectory to the right. The optimum closing angle can not only eliminate the delay of opening valve, but also ensure the smaller closing force which is beneficial to automation.