The sealing degree of vacuum ball valve is very important in the parameters of its accessories. Once the sealing effect exists temperature, the valve will lose its original effect in the process of use. In the field of food production, the sealing condition of the valve body should be more tight. This is because there is a high probability of liquid and powder particles in the food field, as well as the steam and vacuum system. In this way, the valve body of the vacuum valve is subjected to more serious dormitory conditions, which is easy to cause double damage of the valve body inside, affect the sealing effect and lead to the vacuum ball The valve does not function properly in the process.
EVP vacuum pump manufacturer warm prompt, in order to avoid this kind of situation, we need to pay attention to whether the internal structure of valve body is reasonable and whether the materials used have high-quality performance. Only by doing well in these two aspects, the valve body of vacuum ball valve can have longer service life and more reliable safety in pipeline use.
pneumatic ball valve working principle:
To dredge or work a valve by winding it. Pneumatic valve switch is bulky, small volume, can make a large diameter, reliable seal, easy construction, easy to repair, the cover and spherical surface are often closed form, not easy to be eroded by the medium, is losing wide use in various undertakings.
pneumatic ball valve features:
1、 The switch is quick and convenient, and can satisfy the situation that the pipeline has fast opening and fast closing ground dark channel request;
2、 The fluid barrier is small, no matter it is full bore reducing ball valve, it is a kind of the smallest fluid barrier on all kinds of valves;
3、 For reliable seat seal, the ball washer is generally made of tetrafluoroethylene and other plastic materials. For the occasions with higher requirements for sealing, soft seal is easier to guarantee sealing. For non-metallic seal, hard seal structure can accept 10MPa, 16npa, 32Mpa low pressure, and can withstand low temperature, which is 350 ℃ in daily life;
4、 Reliable valve stem seal, stem back sealing structure can increase with the progress of the medium, once the ball valve is opened and closed, the valve stem is only for winding activities, not for ascending and descending activities. The sealing aggregate of the valve rod is not easy to be damaged. The sealing life of the valve rod position is greatly extended;
5、 Long service life, pneumatic installation is more than 60000 in destructive test. Because the sealing position of ball valve mostly adopts PTFE which is excellent self smoothness, the conflict and wear of ball valve and valve stem are minimum, which ensures the service life of pneumatic valve.
The valve body of vacuum ball valve is made of 304 stainless steel, and the structure of its main metal parts should also be made of the same type of stainless steel. In this way, the spherical sealing structure of the vacuum ball valve will not be eroded by water vapor after long-term use, which will lead to premature failure of the equipment due to its service life.