Válvulas esfera excêntricas de grande diâmetro
Large-diameter eccentric ball valves are widely used in low and medium pressure pipelines in petroleum, químico, metalúrgico, poder, and water supply industries, primarily as shut-off valves. This product can be further divided into top-mounted eccentric ball valves and side-mounted eccentric ball valves. According to application, this product is divided into six major series: válvulas de uso geral, válvulas de tubulação, válvulas específicas para lama, válvulas específicas para gás, válvulas específicas para petroquímica, e válvulas específicas para injeção de carvão pulverizado. There are three actuation methods: manual, pneumático, and electric, com oito classificações de pressão (PN0,25~10,0Mpa) e centenas de especificações (40~1000) of ball valve products. In the petroleum, químico, metalúrgico, poder, e indústrias de gás, it is a replacement product for gate valves, válvulas globo, Válvulas tipo Y, and ball valves. Atualmente, it is selling well in the steel industry for pulverized coal injection, the alumina industry for conveying slurry, licor mãe, and alumina powder, the power industry for hydraulic (ou seco) ash removal, the petrochemical industry, and the gas industry, among other applications.
Large-Diameter Eccentric Hemispherical Valve Product Features
1. Full-bore structure with a hemispherical valve core, providing a large flow area, extremely low flow resistance, and significant energy savings. Simultaneously, the sealing surface is not directly eroded, resulting in a long service life.
2. Top-entry structure allows for online maintenance. In specific working conditions, emergency repairs can be performed without disrupting the normal operation of the pipeline system, minimizing the economic losses caused by valve repairs.
3. When opening, the ball crown gradually approaches the valve body sealing surface, effectively removing scale and debris for reliable sealing.
4. Double eccentric structure eliminates wear during opening and closing. During opening, the ball crown quickly disengages from the valve body sealing surface with a short friction distance; when closing, the ball crown rapidly enters the valve body sealing surface, tightening as it closes, minimizing wear.
5. With long-term use, after wear on the sealing pair, the valve seat can be adjusted to restore a good seal.
Product Applications
Used in low and medium pressure pipelines in petroleum, químico, metalúrgico, poder, and water supply industries, primarily as a shut-off valve.
Technical Parameters
1. Diâmetro Nominal: DN200-DN2200
2. Pressão Nominal: 1.0MPa-4.0MPa
3. Medium Temperature: 0℃～120℃
4. Mídia Aplicável: Clean water, raw water, água do mar, esgoto, weak acids and alkalis, pastas, liquids containing small solid particles, etc..
5. Estrutura: Top-loading
Diagrama da estrutura da válvula hemisférica excêntrica
Eccentric hemispherical valve structure and dimensions
