PTFE gaskets are called PTFE gaskets, which are also called PTFE gaskets or Teflon (Teflon) gaskets abroad. Flat gaskets, V-shaped gaskets, piston rings, ball valve gaskets, etc. made of PTFE rods, tubes and plates by mechanical turning or cutting have been widely applied to corrosion-resistant pipes, containers, radar-making and high-frequency communication equipment materials with high performance requirements in recent years as sealing materials and filling materials. So, will the specifications of the PTFE gasket affect its performance?

Whether the specifications of PTFE gaskets will affect their performance, we need to know the specifications of PTFE gaskets. PTFE gaskets can be turned into gaskets of a certain thickness by producing PTFE pipes, which are suitable for small-size and small-batch production of PTFE gaskets; they can be cut from PTFE sheets of a certain thickness, suitable for large, medium and small sizes, Small batch production of PTFE gaskets; it can be molded by molds, suitable for large, medium and small sizes, and mass production of PTFE gaskets. Generally speaking, PTFE gasket specifications are inner diameter and outer diameter thickness, specifications between DN10-2000mm mm, the maximum processing size is ~ 2000mm, special specifications or all kinds of non-standard products can be formulated according to customer requirements.

As for whether the specifications of the PTFE gasket will affect its performance, the answer is yes, especially the thickness of the PTFE gasket will affect its sealing performance.

(1) Because the surface thickness of the PTFE gasket is in a stress state in three directions, the material has strong resistance to deformation. The middle thickness of the PTFE gasket is less affected by the end deformation force. Under the same preload, the middle of the PTFE gasket is more prone to plastic deformation than the surface. At this time, it is more difficult to establish the initial seal. Therefore, when the thickness of the PTFE gasket reaches a certain value, its sealing performance will change or even deteriorate.

Under the same axial load, the thick PTFE gasket has a larger compression rebound. Under the condition that the initial sealing condition has been reached, the thick PTFE gasket with larger elastic reserve can better compensate the relative separation between the sealing surfaces caused by the medium pressure than the thin one, and make the surface of the PTFE gasket retain larger residual compression stress, thus reducing the leakage rate of the PTFE gasket. Therefore, under the same compression load and the same medium pressure, the leakage rate of the PTFE gasket will decrease with the increase of its thickness.

(3) In addition, the large-size PTFE gasket has good creep resistance and cold flow resistance; it can be used safely for a long time in a wide temperature range; it is soft and easy to cut, and can be cut mechanically or manually. Easy to install, more suitable for pipelines and equipment in chemical, power generation, papermaking, oil refining, machinery and other industrial occasions.

Well, the above is whether the specifications of the PTFE gasket will affect its performance. I hope everyone can correctly select the appropriate PTFE gasket for use so as to better exert its sealing performance.