WaterproofWaterproof rubber seals use judgment

??The importance of hydraulic seals detection of aging

??In the hydraulic seal of the most important things is to prevent the formation of seal damage, in addition to an appropriate finish, secure chamfering, remove burrs, and the right thing, in the way the device how to prevent dust drift falls outer seal; when the device how to win the title as the pistons crushed the right place to prevent the sealing member; cleaning hydraulic media.

??When supporting many users after the end of the process, even if the device has passed the test, sent to the user after use for some time still have questions presented, usually under the condition, may be formed by improper use, such as the oil temperature is too high

??Means rubber seals hydraulic seals are not detectable now aging:

??Natural aging test approach

??The atmosphere is divided into the old test, atmospheric accelerated aging test, aging test of natural storage, natural medium (containing buried, etc.) and biological aging experiments.

??Accelerated aging test approach.

??Thermal aging, ozone aging, photoaging, artificial weathering, light ozone aging, biological aging, high-energy radiation and chemical and electrical aging medium aging.

??Hot air aging test for various compounds it should choose what temperature class?

??On natural rubber, the experimental temperature is generally 50 ~ 100 ?, synthetic rubber generally 50 ~ 150 ?, some special hydraulic seal test is even higher temperatures. Such as nitrile rubber hydraulic seal with 70 ~ 150 ?, silicon fluorine rubber hydraulic seal is usually 200 ~ 300 ?. Always, it should be determined according to the experimental details.

??To avoid the use of rubber hydraulic seals aging.

??Pieces burned, you can see the cooling system is not operating properly, rod outer wear and leak, you can see whether the debris inside the hydraulic oil filter is not a failure.

??Seen from above various conditions, even if the user willing to pay a higher value procurement of high-quality hydraulic seals, should be in all aspects of control and supervision to ensure the ability to pay is not no good funding, the selection of professional production house, establish long cooperation partners, is necessary.

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