Wall OTP- top seal supply Taiwan imported star-ring, X-type ring mold standard size fully with the United States As 568A standard O-ring same. It can replace most of the O-ring applications. That is, diameter: 1.78,2.62,3.53,5.33,6.99, other diameter dimensions can also open mold. Imported star-ring (X-ring) Description: star-ring (the star-ring), also known as X-ring, which is formed by its cross-sectional vulcanizing mold four circular annular sealing lip seals It based on O-ring performance has been improved and enhanced, can replace most of the O-ring applications. It is a sealing element can in both directions for sealing purposes. When the trenches installed in various forms of radial or axial pre-compression gives initial sealing capability star-ring, with increasing pressure increases the sealing force. Under pressure, the star-ring cross-sectional shape will transfer pressure evenly to all aspects, it has a good seal. Imported star-ring advantage (compared with the O-ring) 1. section: Imported star-ring (X-ring) since a section four of the sealing lip, when the reciprocating movement of the time, not in the trenches prone to distortion, and therefore does not scroll happen. Non-circular cross-section, to avoid rolling during reciprocation. 2. The amount of compression: With a smaller amount of compression, so that the friction will be smaller, and thus have a longer life. 3. Pressure: Because of its cross-section has a good pressure distribution, thus obtaining a good seal. 4. Lubrication: lubrication between the sealing lip is formed, the situation started to improve. Compared with the O-ring, due to the star-lubricating ring cavity formed between the sealing lips, having a small friction resistance, the resistance started. 5. flash: flash star-ring treatment sectional recess, namely between the two sealing lips, and away from the lip position. Because of its position in the flash section of the recess, so good sealing effect. Drawback import X-ring: under pressure and the resistance limits the star-ring applications: choosing the right material based on temperature, pressure and media. In order to make as a sealing element shaped ring to adapt to a given application, you should consider all the work of mutual restraint parameters. In determining the application of norms, we must take into account the peak temperature, continuous operating temperature and operating cycle. In rotating case, it must also consider the temperature rise due to friction caused by heat. How to choose the star ring: if known shaft hole diameter, the basis of the following criteria to select the appropriate shaped ring 1. static seals or reciprocating linear motion: hole sealed: Star ring inner diameter of the trench should adapt, or less than the outer diameter of the groove is about 2%. Because the pre-pressing force generated by the pre-compression can effectively prevent distortion l on the star seal. Shaft seals: the outer diameter of the star ring inner diameter equal to or greater than the axis of the outer diameter of the appropriate size of about 0.2 ~ 0.3mm can be large relative to the shaft of one percent. Thereby, the sealing ring can be more easily installed, while for longer service life. 2. Turn the seal: diameter shaped ring should be about 2 ~ 5% more than by its sealed shaft diameter. Because the seals used in rotary motion will be friction and heat, and the heat will shrink after the elastomer (Joule effect). In order to be able to seal lubrication and reliable operation, it must use an inner diameter larger than the shaft star ring. Generally, the smaller section of the ring to meet the needs of static sealing, on the contrary, a large section of the seal for meeting the requirements of dynamic seal. In the presence of high pressure or larger extrusion gap, high hardness are required to use the star-ring (X-ring) rubber material. The best way is to add PTFE ring back care. To prevent destruction of the high-pressure extrusion.