Vanne à bille excentrique montée sur le dessus DYQ340F/HY-16C/P
The top-mounted eccentric hemispherical valve utilizes the eccentric valve body, boule excentrique, et siège de soupape. When the valve stem rotates, il se centre automatiquement sur une trajectoire commune. During the closing process, it becomes tighter and tighter, achieving a perfect seal.
DYQ340F/HY-16C/P Top-mounted eccentric ball valve Product Overview
Top-mounted/top-operated eccentric ball valves utilize an eccentric valve body, boule excentrique, et siège de soupape. Lorsque la tige de valve tourne, il se centre automatiquement sur une trajectoire commune, serrer davantage pendant la fermeture pour obtenir une étanchéité parfaite. The ball and seat are completely separated, éliminant l'usure de la bague d'étanchéité et résolvant le problème de l'usure constante entre la surface d'étanchéité et le siège des robinets à tournant sphérique traditionnels. Un matériau élastique non métallique est intégré dans le siège métallique, providing excellent protection for the metal surface. Ce produit est particulièrement adapté aux supports tels que l'acier, aluminium, fibres, petites particules solides, pulpe, cendre de charbon, et gaz de pétrole.
DYQ340F/HY-16C/P Top-mounted eccentric ball valve Structural Features
This valve adopts a double eccentric structure, utilizing the wedging effect of the eccentric wheel to achieve the closing and opening of the sealing pair, thus achieving reliable sealing pressure and rapid opening. Its advantages are as follows:
1. Due to the eccentric structure, the rotation radius of all points on the sealing ball is different. During closure, the sealing seat tightens further, forming sufficient sealing pressure and providing excellent bidirectional sealing.
2. The valve disc adopts a fully circular straight-through design, providing a full-flow structure when open, offering excellent flowability and linear adjustment performance.
3. During long-term use, after wear, a new seal can be achieved by adjusting the sealing ring pressure sleeve, causing the sealing spherical surface to move forward by an equal amount.
4. During operation, the operating force is only applied within a very small opening or closing angle. When opening, the operating force decreases rapidly as the sealing pressure decreases, resulting in near-zero wear on the sealing surface.
5. The circular flow channel provides a full-flow cross-section when the valve is fully open, with a circular streamlined structure at the bottom. Deposited debris is carried away by the flowing medium. Pendant la fermeture, it can automatically remove dirt deposited on the sealing surface without affecting the seal.
6. The valve shaft adopts an upper and lower half-shaft design, equipped with a self-lubricating bushing. During valve opening, frictional resistance is low, and opening and closing are flexible. The unique “O” ring and floating shaft seal replace the original butterfly valve’s packing seal, solving the problem of easy wear and tear of the packing seal during valve opening.
DYQ340F/HY-16C/P Top-mounted eccentric ball valve Applications
Widely used in medium and low pressure pipelines in water supply and drainage, sewage treatment, pétrole, chimique, métallurgique, et industries électriques. Particularly suitable for shut-off and throttling in pipelines containing impurities and particulate matter.
DYQ340F/HY-16C/P Top-mounted eccentric ball valve Standards
Design: GB12237-89
Flange Connection: GB/T17241.6-1998, GB/T9115 (Steel)
Longueur structurelle: GB12221-89
