Imported fluorine rubber seals one to prevent O-rings, seals Taiwan distortions damage - Note 1) Install trench concentricity size, should be accessible and do not produce distortions in the process to consider two aspects. 2) cross-sectional dimensions should be uniform, and at each installation site should be fully applied in the sealing oil or grease. Sometimes you can use the felt impregnated with lubricating oil refueling device. 3) Under the conditions permit, should try to increase the cross-sectional diameter, dynamic seal ring with cross-sectional diameter should generally be greater than the static seal; in addition, imports of O-rings should be used to avoid the large-diameter piston seal. 4) at low pressure also distorting damage, the choice for use with rings. 5) reduce the cylinder and the piston rod of the surface roughness. 6) the use of low friction coefficient material seals. 7) Under certain circumstances, it can be difficult to produce distortions instead of O-ring seals. Second, the molding method O-rings and other sealing products 1) molding method - the old method, the disadvantage of this method more production of rubber products, there has been a series of shortcomings, the article is weighed setting plastic material to fill the mold cavity after Clamping process conducted in order to prevent waste arising from lack of material, methods used to make the plastic material quality pre-weighed taken significantly larger than the finished product quality, and the remaining gum can not be reused in the form of loss flash; at the same time remove the burr on the finished product, but also consume complementary human resources; molding process products can not achieve mechanization and automation, the dragon it is thick-walled products, curing cycle lasts quite long. 2) rubber injection molding method - the current O-rings and other sealing products molding method used rubber injection molding of plastic material is preheated by injection molding machine screw or plunger, through the nozzle high pressure, high speed injection mold type chamber, and vulcanization molding production methods. Rubber injection molding process is a new method developed on the basis of molding method. Rubber injection molding curing process is the biggest characteristic cure cycle is short, less flash, high production efficiency; reduce production preparation process, greatly reduce labor intensity, Long complexity of rubber for large, thick-walled, thin-walled and shape product effect is more significant. It is the molding and curing process into one simple process, to improve the mechanization degree of automation, the molding process repeatable, uniform product quality, improve the quality, it can improve the economic value of rubber products and rubber industry, and has broad prospects for development. Three, o-ring sizes of notation O-ring sizes of representation mainly in diameter, diameter, diameter expressed. ID represents the inner diameter is usually an outer diameter OD is said CS diameter is expressed. Generally marked on the drawing sheet size o-ring inner diameter and the diameter on it. As the diameter is 10mm, diameter is 1.8mm, so the outer diameter o-rings = 10 + 1.8 * 2 = 13.6mm. According to different materials o-ring size is divided into Viton o-ring specifications, silicone O-ring specifications, NBR rubber o-ring specifications, EPDM rubber o-ring specifications, HNBRO-ring specifications.