PTFE woven aramid fiber packing

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PTFE woven aramid fiber packing

  • NamePTFE woven aramid fiber packing


  • Published2014-05-07 09:24:10

Detailed description

PTFE woven aramid fiber packing

PTFE as the main material. Has excellent chemical stability, corrosion resistance, sealing, lubrication is not high viscosity and good aging endurance. Long-term work at a temperature of -180 ℃ to +250 ℃, in addition to the molten metal and liquid sodium  fluoride,  the ability of all  other  chemicals, boiling water is not from the king of change. The following are not allowed pollution is mainly used for environmental sanitary conditions, corrosive and other demanding, high-speed lines, easy to wear and other conditions.

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Q:The sealing principle of metal wound gasket?
Sealing principle of metal wound gasket:The sealing surface when the pressure load, to produce compressive stress, can improve the sealing contact surface, when the stress increases enough to cause the surface of the plastic deformation obviously, it can fill the gap seal cover, plug leakage channel. The purpose of using metal wound gasket is to use the gasket material to produce plastic deformation easily under the action of pressing load, so that it can fill up the tiny and uneven surface of the sealing surface and realize the sealing.Extension of knowledge point:Metal wound gasket is a sealing gasket is used widely at present, in order to return to the best elastic gasket semi metallic gasket, by V or W shaped steel strips with various fillers alternately wound together, high temperature, high pressure and adapt to the use of ultra low temperature or under vacuum conditions, by changing the gasket combination of materials, can solve the problem of all kinds of chemical corrosion medium on the gasket, the structure density can according to different requirements to lock force production.
Q:What effect does the flat gate of DN1200 gate valve have on the gasket?
The valve has the function of sealing gasket, gasket material selection according to the following rules: 1) with water or water is greater than 80 degrees under the conditions of using poly ethylene propylene rubber; 2) in oil and corrosion and high temperature conditions, with metal gasket; 3) in need of sound insulation and static conditions.
Q:What is the function of the washer between the end cap and the case?
To prevent wear, preload, good sealing, buffer, reserved expansion amount of the thermal deformation of the bearing in order to offset the series gap, bearing and motor end cover between the wave washer several special, and when the attention of effective face surface of the stator. The rotor of the quasi. A special wave washer prevents axial movement, i.e., moving at both ends of the shaft.
Q:How to choose the gasket when installing the pressure gauge?
When the tested medium is lower than 80 DEG C and 2MPa, leather or rubber gasket can be used. Under the condition of less than 450 degrees C and 5MPa, asbestos or lead gasket can be used. When the temperature and pressure are higher, the annealed copper or aluminum gasket can be used.
Q:Should the BYD F3 intake manifold installation be encrypted?
Hello!Extra required! If not, use sealant, too!Hope to help you, I wish you a pleasant ride! There's something wrong with the car. Ask the car master. 4S shop professional technicians, 10 minutes to solve. ]
Q:Hydraulic joint with copper and aluminum gasket than rubber gasket will be more durable, sealing performance will be better?
The metal pad before using the best grinding, long time use is also good, but now the popular seal combination, inside is rubber, the outer ring is a metal skeleton, but also the price is disposable, and metal pad almost.
Q:How about the valve gasket?
(2) valve gasket installed on the sealing surface to be correct, moderate, can not be skewed, can not extend into the valve chamber or on the shoulder. The valve gasket sealing surface is slightly larger than the hole diameter, valve gasket diameter should be slightly smaller than a sealing surface diameter, so as to ensure uniform compression.
Q:What is the difference between the sealing ring and the dust cap on the bearing?
Seal ring: ring formed by one or several parts of the cover, fixed in a ring or a washer bearing and another ring or gasket contact or the formation of the labyrinth of narrow gap, to prevent leakage of lubricating oil and foreign matter. Beijing's got all the attention Boyun ring and dustproof cover seal.
Q:Gasket, packing belongs to the scope of mechanical seals?
Packing (packing), also known as sealing packing, is usually woven from a softer thread. Usually, the sectional area is square or rectangular, and the circular strip is filled in the sealed cavity to seal it. Packing is the first cotton fiber plug in the leak path to prevent fluid leakage, mainly used as seal water lifting machinery. As the filler has a wide range of sources, easy processing, low price, reliable sealing, simple operation, so far in use. Now the packing is widely used in reciprocating shaft seal of centrifugal pump, compressor, vacuum pump, mixer and propeller seal, piston pump, reciprocating compressor, refrigeration machine, and various rotating valve stem seal.The gasket does not belong to the mechanical sealing range, and belongs to the auxiliary component of mechanical connection.
Q:Can gb/t97.1 be used for sealing?
Can not. This is the washer used for the nut, not the gasket used for sealing.GB/T 97.1-2002 flat washer level aThis standard specifies the nominal specifications (thread diameter) for 1.6 ~ 64mm, standard series, hardness class 200HV and 300HV grade, product level is a class of flat washers.

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