Teflon packing Aramid
First, let's deal with the structure of this packing:
Woven aramid packing (collar) is composed of aramid fibers impregnated with oil and liquid Teflon and impregnated with silicone oil.
Is a polymeric material (polymer) made by DuPont. This polymeric material has a low coefficient of friction (used in non-stick containers). Polytetrafluoroethylene is best known in the world under the Teflon brand. Since this polymer (Teflon) is rarely excreted by the human body, it is used in medicine and we can use it to make artificial organs in the human body. This polymer (Teflon) has a light weight with a strong structure. It has a neutral or inert chemical property with most industrial chemicals. PETFE polytetrafluoroethylene has a wide temperature range from -260 to 260 degrees Celsius. Teflon has very good resistance to penetration. Polytetrafluoroethylene has excellent dielectric properties and is non-toxic.
Liquid Teflon replaces the usual colorful strip Teflon, which is widely used in building plumbing and fittings. For this reason, Teflon is still widely used as a material to prevent liquid leakage from joints.
Liquid Teflons, like strip Teflons, have different types and require their own type depending on where they are used.
For example, the liquid Teflon used to seal the joints used in chemicals is different from the Teflon used to seal the water joints, and even in fine joints, for example, three-quarters of the joints are of one type and 2-inch and above joints are of another type. Be.
It is important to note that liquid Teflon is also used in the joints to prevent gas leakage.
Silicone oil has the property of polishing and separating power and is used in rubber, plastic, pipe, hose, polishing and waxing, pharmaceutical, automotive, aerospace industries.
Silicone oil High lubrication power and good heat and cold resistance (+50 degrees to -50 degrees) and insulation against electricity and colorless and odorless as well as other features such as gloss, separation power (RELEASE) AGENT) has many applications in many industries and is used continuously.
. The main feature of Kevlar was its high resistance to high heat. This product was used in the production of protective clothing, air purification, thermal and electrical insulation and as an alternative to asbestos. Currently, aramid fibers are known in the industry under the brand name Kevlar. The general definition of aramid is as follows: A product in which a fibrous material is formed in which a long chain of synthetic polyamide with at least 85% of the aramid bonds attached directly to the two aromatic rings.
* From the combination of these materials, Aramid packing is formed
Teflon Aramid Packing (Kevlar):
Packing Aramid is known as Kevlar. Kevlar sealing packing is woven from aramid fibers and for lubrication and flexibility of this packing as much as possible; Aramid fibers are impregnated with silicone oil or Teflon compound. Aramid fibers have a longer life compared to other fibers and refractory yarns and also show a very high resistance to stretching and abrasion. This product is so powerful that it is used in the military industry. For this reason, the production and import of aramid fibers all over the world is associated with many restrictions and also has a very high price. Other features of this product include the following: Excellent mechanical and static resistance among all sealing packages, excellent strength, excellent resistance to chemicals and resistance to gamma rays, X, etc. The thermal tolerance of aramid (Kevlar) sealing packing has been measured up to 280 degrees Celsius, however, this product is able to maintain its strength well at a temperature of 340 degrees Celsius and perform its tasks well. The most important applications of this product are:
Sealing of pumps, shafts and tanks of petrochemicals, refineries, platforms and oil tanks
Application against oils, greases, acids and weakened bases
Sealing high friction motors and rotors
And . .