Hard seal butterfly doors may be problems with maintenance

  Hard seal butterfly valve used in the door, the door on the hard seal butterfly valve repair is inevitable, but to make the valve gate valve repair or prolonged use of the door, only to fully understand the valve gate in the course of the possible problems, in order to better use the door or valve gate valve repair, so only complete understanding of the process of using the door seal butterfly valve problems may exist, in order to better use the seal or seal butterfly doors butterfly door repair.

Sealing butterfly valve gate with problems

    First, as soft and hard layers stacked ring attached to the valve plate when the valve is normally open state board of its medium to form a positive seal surface erosion, dissection of the soft metal tape by erosion, the direct impact on the seal performance.

    Second, by the structural constraints of the structure do not meet the following diameter DN200 gate valve, because the overall structure of the valve plate thick, large flow resistance.

    Third, because the principle of the three eccentric structure, the valve plate sealing surface and the seal between the valve seat is by the transmission of torque to the valve plate to the valve seat pressure. Positive flow state, the higher the pressure medium sealed tight squeeze. When the media countercurrent flow when the pressure increases with the media and the valve seat between the valve plate unit is less than the pressure medium pressure, the seal started to leak.

High-performance three eccentric hard sealing butterfly valve gate

    Characterized in that: as described by the soft valve seat ring seal ring on both sides of T-shaped multi-layer film composed of stainless steel.

    Valve plate and valve seat sealing surface for the oblique cone structure, oblique cone surface in the valve plate welding temperature, corrosion resistant alloy material; plate fixed to the adjustment ring on the plate between the spring and bolt assembly together with the structural adjustment . This structure effectively compensated sleeve valve body and tolerance between the valve rod in the medium and the elastic deformation under pressure to solve the valve door in the process of two-way exchange of media transmission sealing problems that exist.

    The use of soft T-seals on both sides of multi-layer film composed of stainless steel, with a metal seal and soft seal the dual advantages of both low and high temperatures, both with zero leakage sealing performance. Test proved positive flow state pool (medium flow direction and the disc rotation in the same direction), the sealing surface of the pressure transmission medium of the moment and the role of pressure on the valve plate produced. Positive media pressure when the valve plate and valve seat surface oblique cone sealing surface tight squeeze, seal better.

    When the counter-current state, the valve plate and the seal between the valve seat by the drive torque to the valve plate to the valve seat pressure. With the reverse media pressure, the valve plate and valve seat pressure between the units is less than the medium pressure, adjust the ring in the spring under load deformation energy stored in the valve plate and valve seat compensation tight seal face pressure to play the role of automatic compensation.

    Therefore, unlike the present invention, as existing technologies, the board installed in the valve seals soft and hard layers, but directly mounted on the valve body, valve seat in the middle of plate and an additional adjustment ring is the ideal way seal means. It can replace the valve gate and ball valves

 

 

 

Article Description:

1 This article is reproduced or author Ben Wang edit self-publish, Ben Wang published articles aim is to deliver more information to the visitor does not agree with their views on behalf of Ben Wang, and Ben Wang is not responsible for the authenticity of the contents of the article.

2, involving work content, copyright and other problems, please contact Ben Wang at 30 days and we will make an appropriate treatment for the first time! For copyright issues, please contact: +86-510-86101511

3, please indicate Zhuanzhai from this article: Jiangyin Oulei Si gate valve repair equipment Co., Ltd.

 

This keyword: butterfly doors, butterfly doors repair, seal butterfly doors repair, seal butterfly doors, door valve repair, valve door seal