Whether the welded pneumatic butterfly valve can be directly replaced

Tianjin Zuyao valve soup for you: I don't know what you need to replace there? Is it a direct replacement for a pneumatic actuator, or is it a valve body?

As long as it does not affect your normal operation, if the pneumatic actuator is replaced, you must measure the size of the upper flange, center distance, eye distance, etc., to avoid that the newly purchased butterfly valve can not be connected to the pneumatic actuator.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Do you mean to replace all the butterfly valves?

1. Because the multi-layer soft and hard stacked sealing ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a positive scouring on its sealing surface, and the soft sealing belt in the metal sheet interlayer is washed out, which directly affects the sealing performance.

2. Restricted by structural conditions, the structure is not suitable for valves with diameters below DN200, because the overall structure of the valve plate is too thick and the flow resistance is large.

3. Due to the principle of rubber-lined butterfly valve, the sealing between the sealing surface of the valve plate and the valve seat depends on the torque of the transmission device to make the valve plate press to the valve seat. In the positive flow state, the higher the medium pressure, the tighter the sealing and extrusion. When the medium in the flow channel is reversed, with the increase of the medium pressure, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, and the seal begins to leak.

4. The high-performance welded butterfly valve is characterized in that: the valve seat sealing ring is composed of multiple layers of stainless steel sheets on both sides of the soft T-shaped sealing ring.

The sealing surface of the valve plate and the valve seat is an oblique cone structure, and the temperature-resistant and corrosion-resistant alloy materials are surfacing on the surface of the oblique cone of the valve plate; A structure in which the spring fixed between the adjusting ring pressure plate and the adjusting bolt on the pressure plate are assembled together. This structure effectively compensates for the tolerance zone between the shaft sleeve and the valve body and the elastic deformation of the valve stem under the medium pressure, and solves the sealing problem of the valve in the process of two-way interchangeable media transportation.

The sealing ring is composed of multi-layer stainless steel sheets on both sides of the soft T-type, which has the dual advantages of metal hard sealing and soft sealing, and has zero leakage sealing performance regardless of low temperature and high temperature. The test proves that when the tank is in the positive flow state (the medium flow direction is the same as the rotation direction of the butterfly plate), the pressure of the sealing surface is generated by the torque of the transmission device and the effect of the medium pressure on the valve plate. When the pressure of the forward medium increases, the tighter the squeezing of the oblique cone surface of the valve plate and the sealing surface of the valve seat, the better the sealing effect.

When in the reverse flow state, the seal between the disc and the seat is pressed against the seat by the torque of the drive device. With the increase of the pressure of the reverse medium, when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the deformation energy stored by the spring of the adjusting ring after load compensates for the tight pressure of the valve plate and the sealing surface of the valve seat to play an automatic compensation role.

Therefore, the utility model discloses is not like the prior art, a soft and hard multi-layer sealing ring is installed on the valve plate, but is directly installed on the valve body, and an adjusting ring is a very ideal two-way hard sealing mode is added in the middle of the pressing plate and the valve seat. It will replace gate valves and ball valves.