Large diameter eccentric hemispherical valve is widely used in petroleum, chemical, metallurgy, electric power, water supply and other low and medium pressure pipelines, mainly as a shut-off valve. The product can be divided into top mounted eccentric hemisphere valve (top mounted eccentric hemisphere valve) and side mounted eccentric hemispherical valve. According to the application, the product can be divided into six series: general valve, pipeline valve, slurry special valve, gas special valve, petrochemical special valve and pulverized coal injection valve. There are three kinds of transmission modes: manual, pneumatic and electric. There are eight pressure levels (pn0.25 ~ 10.0MPa) and hundreds of specifications (40 ~ 1000). In petroleum, chemical industry, metallurgy, electric power, gas and other industries, it is the replacement product of gate valve, globe valve, Y-type valve and ball valve. At present, it has been sold well in coal injection in iron and steel industry, slurry, mother liquor and alumina powder transportation in alumina industry, hydraulic (or dry) ash removal in power industry, petrochemical industry, gas industry and other occasions.Industry, gas industry, etc。

It is used in petroleum, chemical, metallurgy, electric power, water supply and other low and medium pressure pipelines, mainly as a shut-off valve.

1. Nominal diameter: dn200-dn2200
   2. Nominal pressure: 1.0mpa-4.0mpa 3. Medium temperature: 0 ℃ ~ 120 ℃
   3. Applicable media: clear water, raw water, sea water, sewage, weak acid and weak alkali liquid, slurry, liquid containing small solid particles, etc
   4. Structural form: top mounted

1. Full bore structure, hemispherical valve core, large circulation area, low flow resistance and obvious energy saving effect. At the same time, the sealing surface is not directly washed out, and the service life is long.
2. Top mounted structure, online maintenance. In some special working occasions, the normal operation of pipeline system can not be affected during rush repair, so that the benefit loss caused by rush repair valve can be minimized.
3. When the ball crown is opened, it has the function of approaching to the sealing surface of the valve body, which can effectively remove the scale and debris, and realize reliable sealing.
4. Double eccentric structure, no wear of switch. When opening, the ball crown quickly separates from the sealing surface of the valve body, and the friction distance is short. When the ball crown is closed, the ball crown quickly enters the sealing surface of the valve body, and the closer it is, the less the wear.
5. After long-term use, the valve seat can be adjusted after the sealing pair is worn, so that it can achieve good sealing again.