china Import rubber o-rings production factory O-ring selection and precautions

　　china Import rubber o-rings production factory When choosing O-rings, the new national standard should be selected first. The wire diameters of 2.65 and 3.55 are the most common. When the outer diameter is greater than about 30 and the structure size allows, try to use the wire diameter of 3.55. O-rings for greater compression and contact area.

　　china Import rubber o-rings production factory believes that O-rings are mainly made of nitrile butadiene rubber NBR and fluorine rubber FKM, and fluorine rubber is more suitable for high temperature conditions. In addition to the material, an important indicator of the O-ring is its hardness, which is generally expressed by Shore hardness, ranging from 60 to 90. The larger the value, the higher the hardness. Under the same pressure, the higher the hardness, the stronger the anti-extrusion ability. Therefore, O-rings with higher hardness should be selected.

　　china Import rubber o-rings production factory found that there are relevant national standards for the design of O-ring grooves, which are mainly divided into three types: transfer seal, axial static seal and radial static seal. The O-rings of flanges, box covers, etc. are axially compressed to facilitate assembly and ensure sealing performance. Flat sealant must not be used on the sealing surface with O-rings, and a small amount of butter can be applied to the O-rings to prevent them from falling off. china Import rubber o-rings production factory suggests that during maintenance, the O-ring specification should be determined according to the groove size, not the thicker the wire diameter, the better.