What is the difference between vacuum flange and ordinary flange？

The flange is the main component in piping system software. It can form a detachable connector together with washers and anchor bolts and has a connection function in the pipeline. We all know that there are many types of flanges, such as flat vertical welding flanges, vertical welding flanges with necks, butt welding flanges with necks, socket welding flanges, external thread flanges, etc. What is a vacuum flange? Compared with ordinary flanges, what are the characteristics of vacuum flanges?

1. The vacuum flange is a small device used in the vacuum system. It looks like a circle, and its diameter is larger than that of the specific connection pipe; there are small holes on the edge of the flange; the vacuum flange can be mobile or It is a turntable type. There are often four to five holes in the mobile flange, which can be inserted into the hole of the pipe or the opening of the chamber, while the rotatable flange often has a large number of holes, so even if the plumber Turns the flange in any direction, the hole can still be aligned with the hole on the pipe and then fill the hole with the screw-tight anchor bolt to connect the flange and the pipe to each other, so it is suitable for the pipe. The natural vacuum flange can also be welded to the piping system software to ensure that the working pressure is not easy to escape the vacuum system according to the small hole.
   2. There are three key types of vacuum flanges, namely vacuum flange specifications and models CF Vacuum flange, KF Vacuum flange, and ISO vacuum flange.
   CF flange is a kind of flange connection used in extremely high vacuum. It is a metal material packing seal and can withstand high-temperature baking. The raw material is generally 304.316 stainless steel plate, etc. The nominal diameter of the flange includes DN16.40.63. 100.160.200.250, the raw material of flange sealing is generally Viton, PTFE, oxygen-free copper, etc. Therefore, its available vacuum degree is up to 10-12mbar (that is, 1000-1200Pa).
   ISO-KF flange is a kind of quick-release flange used in vacuum systems. It is composed of several components below, KF flanges symmetrically distributed. O-Ring. Rest assured support frame. The raw material is generally 304.316 stainless steel plate, etc., the outer diameter specification includes DN10.16.25.40.50, and the flange sealing raw material is generally Viton.Buna.Silicone.EPDM.Aluminum, etc., and when the ISO-KF flange is applied, no other special tools are required. , the connection can be loosened or clamped by simply screwing on the disc nut, so its maximum available vacuum is 10-18mbar (that is, 1000-1800Pa).