New technology of metal hard sealing ball valve

Our North Valve Group Co., Ltd. is a manufacturer of research and development, production and sales of standard general industrial valves such as metal hard-sealed ball valves, ball valves, gate valves, butterfly valves and globe valves, with diameters ranging from 10mm to 3000mm and nominal pressure PN ranging from 1Mpa to 80Mpa. At the same time, we can also customize non-standard valves for you. Welcome to call us.

In the conventional design, the metal hard sealing ball valve mainly uses the left and right valve bodies to form the shape of the ball valve, and its sealing structure is sealed by two independent valve seats. Because the valve seat and the valve body are in clearance fit, and the bottom of the valve seat and the valve body must be sealed with sealing materials, all parts that need to be sealed may leak, and the leakage clearance around the valve seat provides conditions for wear, corrosion and accumulation.

During the opening and closing movement of ball valve, the compression degree of sealing material at the bottom of valve seat will change, and some parts will also infiltrate. Long-term leakage caused by medium will seriously affect the normal operation of the valve, and the valve seat and its bottom seal will be damaged prematurely. Due to many leakage points, the service life of the valve is generally short, which usually cannot meet the user's requirements. The ball valve can be replaced frequently to maintain the operation of the system.

Q941Y PN16~PN63 Floating Hard Seal Electric Ball Valve

The new metal hard sealing ball valve has the following characteristics: < br/ >

I. Structure

The main components of one-way metal sealing ball valve are left valve body (including integrated valve seat), right valve body, ball, right valve seat, elastic pad and valve stem. The left valve body is in contact with two valve bodies, and the ultra-hard coating is obtained by surfacing stellite alloy or spraying metal particles at supersonic speed, and the integrated valve seat sealing surface is directly made on the upper valve body.

The sphere also adopts the surface hardening technology of supersonic spraying. The right valve seat is not sealed and no surface hardening is required. The elastic pad can be made of flexible graphite or elastic spring.

Second, the working principle

One-way metal sealing ball valve is improved on the basis of ordinary two-piece metal sealing ball valve. Connect the left valve seat and the left valve body together to form an integrated valve seat. The ball and the integrated valve seat in the left valve body form a sealing ring.

The installation of the ball valve on the pipeline is directional, with the left end connected to the downstream pipeline and the right end connected to the upstream pipeline. Through the pressure of the upstream pipeline and the thrust of the elastic pad at the bottom of the right valve seat, the ball is pressed on the integrated valve seat in the left valve body to form a sealing pair, thus achieving the sealing of the ball valve.

The right valve seat only guides and fastens the ball. Because of the integrated valve seat, the number of parts of the ball valve is reduced, and the leakage points between seals are reduced. This integrated valve seat prevents the leakage of medium around the valve seat, and has simple structure and excellent sealing performance. Can really achieve zero leakage of the ball valve. The ball valve with this structure is very suitable for special working conditions and occasions such as solid particles or dust.

III. Conclusion

One-way metal sealing ball valve has compact structure, few parts, beautiful appearance and few leakage points, realizing zero leakage and saving cost. Due to the elastic pad at the bottom of the right valve seat.

Therefore, the sealing pair formed by the ball in the ball valve and the integrated valve seat in the left valve body needs to be hardened. And must cooperate with grinding to form an uninterrupted sealing belt, so that the ball valve can achieve zero leakage. There is no sealing requirement for the right valve seat in the ball valve, so the accuracy requirement is low, and there is no need for secondary grinding and quenching. This product is easy to work and suitable for mass production. Small switching torque and long service life. This product has obtained the national patent.

Products are widely used in metallurgy, paper making, steel and thermoelectric systems and other industries, with good performance.

After reading this article "New Technology of Metal Hard Seal Ball Valve", I believe you have a certain understanding of metal hard seal ball valve. Our North Valve Group Co., Ltd. is a manufacturer of metal hard seal ball valves. For decades, the company has sold high-quality valve products, and the product technology and quality have been certified by national authorities, reaching national standards and deeply trusted by customers.

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