EQ340H/EQ347H Hard-seal eccentric ball valve Cast iron, gjutstål, rostfritt stål
Namn: Excenterkulventil med hård tätning
Modell: EQ340H/EQ347H
Diameter: DN15-DN800
Tryck: 1.6MPa-6.4MPa
Material: Cast Iron, Gjutstål, Rostfritt stål
Certification: ISO9001:2000
The hard-seal eccentric hemispherical valve utilizes an eccentric valve body, excentrisk boll, och ventilsäte. När ventilskaftet roterar, den centrerar sig automatiskt längs en gemensam bana, tightening further during closure to achieve a perfect seal. The valve ball and seat are completely separated, eliminating wear on the sealing ring and overcoming the problem of constant wear between the sealing surface and the seat in traditional ball valves. Icke-metalliskt elastiskt material är inbäddat i metallsätet, ger utmärkt skydd för metallytan på ventilsätet. This product is particularly suitable for media such as steel, aluminum, fibrer, små fasta partiklar, massa, kolaska, och petroleumgas.
Features of the Hard-Seal Eccentric Hemispherical Valve
1. Its structure adopts an eccentric clamping principle, achieving the purpose of tightening, regulating, and closing through a transmission mechanism. The sealing pair is a metal-face ring with hard-face contact sealing. The double eccentric structure ensures that the valve core is located in the ball chamber during opening, vilket resulterar i ett stort flödestvärsnitt och förhindrar ventilerosion. Under stängning, the valve core is also prevented from being eroded. Under öppning, den sfäriska ytan på ventilkärnan rör sig gradvis längs ventilsätet, effektivt avlägsnar avlagringar och uppnår en pålitlig tätning. It is particularly effective for mixed-flow conveying of two-phase flow systems prone to scaling and solid precipitation.
2. The valve hemisphere is made of bimetallic material, med olika legeringar svetsade på basmaterialet. Även ventilsätet är svetsat och specialbehandlat. The sealing surfaces are combined into various types, including corrosion-resistant, slitstark, och höghållfasthet, to meet the needs of different applications.
3. It provides a tight seal, achieving zero leakage when conveying harmful gases.
4. The valve core of the sealing pair has a compensation allowance. Even after the valve wears down, a slight rotation when closed will still ensure a reliable seal, extending its service life. Dessutom, users can unscrew the compression nut, adjust or replace the valve seat, and it will still be usable, avoiding the drawback of having to scrap the entire unit after valve seal failure.
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