Wall OTP- top seal supply Taiwan imported star-ring, X-ring mold standard size fully with the United States As 568A standard O-ring identical. Can replace most of the 0-ring applications. Ie diameter: 1.78,2.62,3.53,5.33,6.99 other diameter dimensions can open mold. Imported star-ring (X-ring) Description: Star-ring (the star-ring), also known as X-ring, which is the formation of the cross-section through the mold cure four annular sealing lip seals It's based on the O-ring performance has been improved and improved, can replace most of the O-ring applications. It is a kind of sealing member may both directions for sealing purposes. When installed in various forms of grooves in the radial or axial precompression imparting initial star-ring sealing capability, the pressure increases with increasing its sealing force. Under pressure, the star-ring cross-sectional shape causes a uniform pressure is transmitted to the various aspects, it has good sealing effect. Import star-ring advantage (as compared with the O-ring) 1. The cross-section: import star ring (X-ring) due to the cross-section four sealing lip, when the reciprocating motion, when not in the trench prone to distortion, so it will not roll occur. Non-circular cross-section, to avoid rolling on reciprocation. 2. The amount of compression: With a smaller amount of compression, so the friction will be smaller, and thus have a longer life. 3. Pressure: Because of its cross-section has a better pressure distribution, so get a good seal. 4. Lubrication: Lubrication formed between the sealing lip, the situation started to improve. Compared with the O-ring, due to the formation of the star seal lubrication cavity between the sealing lips, having a small friction resistance, starting resistance. 5. flash: flash star-ring recess processing section, namely between the two sealing lips, and away from the lip position. Because of its location in the flash section of the recess, so the good sealing effect. Disadvantages import X-ring: under pressure and resistance limits the application of the star-ring: select the appropriate materials according to the temperature, pressure and media. In order to make a star ring sealing element adapted to a given application, you should consider all of the work of mutual restraint parameters. In determining the application specification, you must take into account the peak temperature, continuous working temperature and operating cycle. Rotating case, you must also consider the temperature rise due to the heat caused by friction. How to choose the star ring: if you know the diameter of the shaft hole, then on the basis of the following criteria to select the appropriate star 1. static sealing ring or reciprocating linear motion: hole sealed: Star ring with an 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 the star-shaped ring of twisted l. Shaft seals: outer diameter inner diameter of the star seal should be equal to or greater than the appropriate axis of about 0.2 ~ 0.3mm outer diameter relative to the shaft may be larger than 1%. Accordingly, seals can be installed more easily, and get longer life. 2. Turn the sealed: diameter star seals should be about 2 to 5 percent bigger than the shaft diameter is it sealed. Because seals used in rotary motion will be friction and heat, and the heat will shrink after the elastomer (Joule effect). In order to make reliable lubrication and seals have to work, you must use the inside diameter larger than the shaft star ring. Typically, a small section of the ring to meet the needs of static sealing, on the contrary, a large section of the seal is applied to meet 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 damage to the high-pressure extrusion.