??How to pick the right rubber O-ring

??Rubber O-ring seal is a typical extrusion, so resilience and resistance to permanent deformation of the product's performance is to determine whether the rubber O-ring is the main quality standard, rubber O-ring seals in many combinations which acts as a pressure seal and the role of preload. If there is no good resilience will greatly reduce the sealing performance. Since the rubber O-ring seals for both to do and to do static seals, and can also be used with other sealing devices in combination, so the application is very extensive.

??We selected rubber rubber O-ring diameter is the inner diameter of the election more rubber material properties of the rubber, and everyone in order to make better use of rubber O-ring material is generally important consideration, commonly used materials are nitrile rubber (NBR), Viton ( FKM), silicone rubber (SIL), ethylene propylene diene monomer (EPDM), chloroprene rubber (CR), natural rubber (NR) hydrogenated nitrile rubber (HNBR), butyl rubber (IIR), silicone rubber, fluorine (FLS )Wait.

??The silicone o-ring has excellent heat, cold, ozone resistance, resistance to atmospheric aging function, has an excellent insulating function. But the tensile strength is poor and not having oil resistance. Do not advocate used most concentrated solvents, oils, concentrated acid and sodium hydroxide. Usually use planning for the temperature -55 ? ~ 250 ?.

??Viton o-ring on the majority of the oil and solvent have ability to resist, especially acids, aliphatic hydrocarbons and animal and vegetable oils. We do not advocate used ketones, low molecular weight esters and a mixture containing nitrate. Usually use planning for the temperature -20 ? ~ 220 ?.

??Nitrile rubber o-ring usually use planning for the temperature -40 ? ~ 120 ?, and it is suitable for petroleum-based hydraulic oil, hydraulic oil, diester Department of lubricating oil, gasoline, water, silicone grease, silicone and other media Applying. Not available in sideways polar solvents, such as ketones, ozone, nitro hydrocarbons, MEK and chloroform.

??Polyurethane o-ring mechanical function is very good, wear resistance, high-voltage functions are much better than other rubbers. Aging resistance, ozone resistance, oil resistance is also quite good, but the high temperature easily hydrolyzed. Typically used for high pressure resistance, wear sealed areas, such as a hydraulic cylinder. Usually use planning for the temperature -45 ? ~ 90 ?.

??It requires special features to be considered a problem commonly known as the special material formulation.

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