One, imported X type ring
1) imported star (X-ring) is also a standard part of the cross section for the X type sealing ring.
2) size: diameter * diameter;
3) the implementation of standards: American Standard AS568, Japanese standard JIS2401-P, JIS2401-G, etc.;
4) the hardness of the material: NBR70 Black;
Use temperature: Limit: -40~120 C, long term: -20~100;
6 performance characteristics: resilient sealing, wear-resistant, high temperature resistance, oil resistance, can be stable in different media work, and long life.
Widely used: in the gas or liquid medium, can be suitable for a variety of static and dynamic environment for long-term use.
Two, the import of X type circle is generally expressed how the method
Mainly divided into 2 forms, one is the diameter of the wire diameter, and the other is the diameter of the diameter of the wire diameter. At present, foreign and domestic use of multiple is the diameter of the line diameter of the representation method. Such as AS568, American Standard JIS G/P are expressed with inner diameter of wire diameter *. And GB/T342.1-1982 is also the diameter of d1* diameter d2. For example, X ring 25*1.8, said sealing ring of the inner diameter of 25 mm, 1.8 mm diameter rubber ring is.
Three, high elastic imported X type ring
We know that the sealing ring is deformed and principle depend on external back seal. The rubber elasticity is good or bad and the tensile strength is good or bad is one of the important indexes to measure the seal ring. Taiwan Asahi Meike seal XOK all imported rubber material and advanced production technology, the tensile strength of sealing ring with high elasticity and excellent. Rubber elasticity is generally used to indicate the rebound rate, and sometimes can also be used for elongation and permanent deformation of the import material elongation, permanent deformation is small, flexible. And the high elasticity is mainly related to the molecular weight, the conformation entropy of the coiled coil, the crosslinking density of the curing compound and the type of the cross link. Rubber molecular weight is conducive to the increase of elasticity. Appropriate cross-linking can reduce or eliminate the slippage between the chains, which is beneficial to the improvement of the elasticity. And the multi - sulfur bond can be small, the motion of the chain segment of the smaller binding force, then return to the flexibility is better.
Four, polyurethane PU wear resistant imported X type ring
PU polyurethane elastomer with "wear rubber" said, can be in a wide range of hardness with high elasticity and strength, excellent wear resistance, oil resistance, fatigue resistance and seismic performance. At the same time, it has the advantages of good tensile strength, tear strength, impact resistance, water resistance, oil resistance, etc.. Therefore, it is widely used in petroleum, sports, construction, automobile, metallurgy, mineral processing, printing, insulator, shoe soles and solid tire and other sectors. Taiwan Asahi Meike seal XOK, now offers two types of PUo - ring seal products; a sealing ring under normal conditions; another is PU polyurethane X ring special hydrolysis resistance, this special material price than under normal circumstances will be slightly higher. Why does polyurethane PU have such a good performance, including wear resistance? This also from the structure of the PU material itself to find the reason, what kind of structure determines what kind of performance. The polyurethane polyurethane is, macromolecular compounds with repeating carbamate groups in the main chain. It is made of organic diisocyanate or polyisocyanate with two hydroxyl groups or polyhydroxy compounds together with. This structure determines its various excellent properties.
Our star ring is extended to Beijing, Shanghai, Tianjin and other parts of the country, and then generally around the world. Have good electrical insulation