Double eccentric hemispherical valve range of applications and structural features
January 17 02:02:49, 2019
Double eccentric hemispherical valve introduction: Double eccentric hemispherical valve using eccentric valve body, eccentric ball and valve seat, valve stem for rotational movement in the common trajectory automatic centering, the process of closing off the more the more tightly, fully achieve the purpose of a good seal. The double-eccentric hemispherical valve is completely separated from the valve seat, eliminating the wear of the sealing ring and overcoming the problem that the conventional ball valve seat and the ball sealing surface always wear. The non-metallic elastic material is embedded in the metal seat and the valve seat metal surface is well-received protection of. Double eccentric hemisphere valve applications: eccentric hemisphere valve products are particularly suitable for steel, aluminum, fiber, small solid particles, pulp, coal ash, LPG and other media. Due to welding different alloys (or combination of ball) bimetal sealing pair of optional eccentric hemispherical valve can be used for wear-resistant, corrosion-resistant, high temperature and require strict sealing conditions. 1, common eccentric hemisphere valve: Specifications Model DN40-1600. Suitable for sewage treatment, pulp, urban heating and heating and other demanding occasions 2, the eccentric chemical semi-spherical valve: DN40-1600 specifications. For crude oil, heavy oil and other oil products, weak corrosive chemical industry, two-phase mixed media 3, eccentric gas hemisphere valve: Specifications DN40-1600. For gas, natural gas, liquefied gas transport control 4, slurry-specific eccentric hemisphere valve: Size DN40-1600. For liquid, solid two-phase mixed flow or liquid transport chemical reaction with crystallization or scaling industrial pipeline 5, coal ash slag valve: size DN40-1600. Structural characteristics: 1, the valve structure using eccentric tight tight principle through the transmission mechanism to achieve the purpose of regulating, closing, sealing pair is a metal surface zone belt Hard-surface contact seal, the double-eccentric structure is open when the spool is located in the possession of the ball room, the flow cross-section, and the valve is not washed, the valve core is not washed off when closed, open when the valve core gradual spherical seat along the effective removal of knot Scale barriers, to achieve a reliable seal. It is particularly effective for mixed flow delivery of two-phase flow-prone fouling solids. 2, the valve hemisphere with bimetallic, base metal surfacing on different alloys, the valve seat is also the corresponding surfacing by special treatment, the sealing surface into anti-corrosion, wear-resistant, high strength and other types to meet the needs of different occasions . 3, sealed tightly, delivering zero harmful gas leakage. 4, the seal of the spool left compensation, when the valve to do wear, turn off a little while, can be reliably sealed, extending the service life. In addition, the user will squeeze the nut twist off, seat adjustment or replacement valve is still available, to avoid the failure of the valve seal, the entire scrap defects.