Bidirectional adjustable eccentric semi ball valve is our company following the loading type eccentric semi ball valve series product development and a new improved varieties, with normal valve flow resistance is small, the advantages of rapid opening and closing, simple structure, small volume, light weight, convenient operation, compared with eccentric toploading semi ball valve, will the eccentric shaft is changed into three piece shaft, with the production of good manufacturing process, the accuracy of dimension chain is easy to ensure the seal at the valve, stable quality, excellent performance characteristics of the valve seal, partial strict implementation of the new GB/T 26146-2010 "eccentric semi ball" and the national standard, it solves the partial ball valve before the introduction of the national standard the implementation of standards for customer selection and quality assessment caused by lawless chaos, with reliable interchangeability of the installation.
|Test and test||GB/T13927-2008|
1, eccentric structure action:
A, open or close the valve cap and valve seat when an instant from the instant or contact, reduces the contact wear process of the ordinary ball valve switch.
B, the valve is closed, the spherical cap has self compacting effect in medium eccentric torque, reliable sealing.
C, when the valve is worn for a long time, it can adjust the rotation angle of the ball by adjusting the external drive device to compensate the wear and tear, thus prolonging the service life.
2, valve seat after the elastic rubber gasket or spring, has the effect of preloading on the valve seat, valve seat, when the spherical sealing surface wear, the elastic element without any adjustment to the automatic compensation of the main seal pair normal wear.
3, 60 degrees around the spherical ball scraper structure can be pre cutting and scraping thick medium surrounding the main sealing pair, reducing the main sealing wear with self-cleaning function.4, when the valve is opened, the spherical sealing surface in the channel inside, to effectively prevent the erosion of the sealing surface of the spherical medium.
5, the spherical sealing surface by nitriding nitriding layer thickness 0.3mm, hardness is HRC50-55, this process can enhance the wear resistance of the side seal.
6, a reasonable choice of main sealing cap and valve seat sealing surface of the hardness difference, in order to prevent the friction occlusion phenomenon of same material.
7, imported O ring selection, can avoid the mouth and exit leakage.
8, when the valve for long-term use of leakage occurs, you can not remove the valve from the pipeline, only the top and bottom cover is connected, fine-tuning the top and bottom of the wire can be.
9, optional drive mechanism, the commonly used drive types are manual, worm gear drive, electric, pneumatic, hydraulic, etc., which can meet the needs of simple drive, but also to meet the needs of remote automatic control.
10, the valve structure types are: one-way hard seal, two-way hard seal, side mounted, mounted type.
11, the valve material can be reasonable according to different conditions, the main material used: Body: QT450-10; sealing ring: Ding fine rubber, three yuan ethylene propylene, fluorine rubber, etc.; main sealing pairs: 2Cr13.
Can be used in petroleum, chemical, power generation, paper making, mining and other industries, especially suited to raw water, steel waste water, slag water and other complex water systems.