The high temperature and high pressure ball valve has the characteristics of good adaptability, high degree of automation, stable operation, strong manufacturability, good corrosion resistance, good operating environment, complete and reliable protection devices, and beautiful appearance. It is an automatic pressure relief protection device opened by the inlet static pressure, and it is one of the important accessories of the pressure vessel. Suitable for high temperature and high pressure water, steam, petroleum, coal, fiber, thick and corrosive media, and media with particles, for cutting or connecting
Through the medium, it can also be used for fluid adjustment and control.
The high temperature and high pressure ball valve is a metal seal structure, the sealing form is metal to metal seal, metal seal ring can be exchanged to metal seal, stainless steel plate and graphite composite plate seal ring is sealed to metal, and the ball is installed in the diameter direction of the pipeline. In the cylindrical passage of the hard-sealed ball valve body, the disc-shaped sphere rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation reaches 90°, the valve is fully opened.
So, what are the benefits of hard sealing of high temperature and high pressure ball valves?
Under normal working conditions, maintaining a harmonious temperature and pressure ratio, it has a long service life and maintenance-free period, as well as reasonable corrosion data.
What is the essential difference between ball valve hard seal and soft seal?
1. The difference in structural mechanism
Hard seal refers to the seal between metal and metal. The sealing ball and valve seat are both metal.
The soft seal means that the two contacting sealing surfaces can be separate or all soft materials can be used.
2. The difference in sealing materials
The hard-sealed ball valve is precisely processed using the seat material to ensure the accuracy of the fit with the ball.
The soft seal means that the sealing material embedded in the valve seat is a non-metallic material, and the processing accuracy requirements are relatively low for the hard seal.
3. The difference in usage conditions
Hard seals can generally be made at very high pressures.
The soft seal cannot be used under corrosive media conditions due to the problem of the flowing medium.