??Waterproof rubber seals use judgment

??Waterproof rubber seals to play the role of water, because the water cycle is the use of rubber elastomeric material production, so the full name, also called waterproof rubber ring. To provide procurement waterproof waterproof ring ring size, material, hardness, tolerance and other parameters, while visual inspection of the parting line flash can not exceed 0.05MM, or water cycle will not achieve its own role. Waterproof ring for different uses and materials can be divided into waterproof silicone ring, silicone rubber waterproof ring, watch waterproof ring, water laps conductivity, thermal conductivity, water laps, LED waterproof ring.

??Rubber seal is required for the finished product be sealed to prevent oil spills, leakage of liquid and the like, but also to dust. Rubber seals in machinery and equipment, electrical and electronic products broader application, is an indispensable accessory rubber seals to protect all the functions of the entire product. Rubber seals can be divided into rubber seals NBR nitrile rubber, NR natural rubber, rubber seals, CR neoprene rubber seals, EPDM rubber seals EPDM, HNBR HNBR rubber seals.

??Determine the amount of tightening rubber seals

??? static sealing: a, on the cylindrical surface seal take 10-15%; b, static sealing plane take 20-30%.

??? reciprocating seals: take 10-15%;

??? rotational seal: O-ring inner diameter than the shaft big 3-5% (Joule effect), an outer diameter tightening amount of 3-8%.

??Rubber seals touch surface finish

??About static seal usually not less than 3.22-1.6 level dynamic seal ring groove on the touch surface is not less than the 1.6-0.8 level, whichever is higher finish on a high pressure should be taken.

??Extruded rubber seal appearance

??When the pressure is high the gap is large, rubber seals can be extruded into the fluid pressure sealing gap, the design should pay attention to the pressure, the void, the hardness of the O-ring, O-ring cross-section diameter matching these elements, if necessary, on both sides increase the Teflon rings.

??Means rubber seals

??Payments into the channel parts strewn eliminate burrs ? rubber seal means;

??? selection help lead things;

??? avoid rubber ring is mounted in the groove means change after deformation.