Rubber gasket
The rubber gasket is a gasket with a wide range of basic applications. It is a synthetic rubber made by vulcanizing polymers, adding fillers, pigments and various additives. It has considerable compressibility and resilience. Only a very low preload is required to play an effective sealing role under the condition of low temperature and low pressure. It is easy to disassemble and assemble, and can also achieve good sealing effect on uneven sealing surfaces. Due to the expansibility and impermeability of rubber gasket, it can effectively seal against the passage of gas and fluid. Common rubber gasket materials include natural rubber, nitrile rubber, neoprene, ethylene propylene rubber, silicone rubber, fluororubber, etc.
Performance characteristics of rubber gasket:
Natural rubber (NR)
Vulcanized natural rubber has high elasticity, high mechanical strength, bending resistance, tear resistance, impact resistance, good corrosion resistance to alkali and dilute acid, no resistance to non-polar solvents, poor oil resistance, and is prone to aging under the action of oxygen and ozone.
NBR
Its oil resistance is second only to polysulfide rubber, polyacrylate rubber and fluororubber in the existing rubber. It also has the mechanical strength and wear resistance required as a sealing material, and is widely used in various dynamic and static seals. The combination of NBR and PVC can further improve its ozone resistance, abrasion resistance and flame retardancy. It can also improve its ozone resistance and low-temperature bending property when used together with EPDM. The oil resistance and low temperature resistance of NBR are closely related to the acrylonitrile content.
Neoprene (CR)
Neoprene rubber is a self reinforcing elastomer with polarity second only to nitrile rubber. Its physical and mechanical properties are similar to natural rubber, and its aging resistance and chemical corrosion resistance are better than natural rubber. It is a good kind of general rubber. Oil resistance is inferior to natural rubber and superior to other general rubber. It is resistant to the corrosion of inorganic acid and alkali, and is flame retardant rubber.
Ethylene propylene rubber (EPDM)
The copolymer of ethylene and propylene, with ozone resistance, aging resistance and weather resistance, electrical insulation and corona resistance, has excellent corrosion resistance, especially in high-pressure water vapor, so it can be used as the gasket of high-pressure water vapor device. Ethylene propylene rubber has good stability to various polar chemicals, ethanol, ketone ester, acid alkali, phosphate ester working oil. And sex is cheap.
Silicone rubber (SI)
Silicone rubber has a wide temperature range (- 100~+350 ℃), resistance to oxygen, ozone, light and climate aging, good electrical insulation, high permeability, physiological inertia and mold resistance. Special silicone rubber also has oil resistance, radiation resistance and combustion resistance. The disadvantages of silicone rubber are low strength, poor acid and alkali resistance, and high price.
Fluoroelastomer (FPM)
Fluorine rubber has excellent oil resistance and high temperature resistance, which is comparable to silicone rubber. Its major feature is high corrosion resistance. Its stability to organic liquids (such as various oils, fuels, solvents, hydraulic fluids), high concentration hydrogen peroxide and other strong oxidants is better than other rubbers. Domestic fluorine rubber is divided into two types, namely 23 type and 26 type fluorine rubber. Type 23 fluororubber has better resistance to strong oxidizing acids than type 26, but has poorer resistance to aromatic solvents, chlorinated organic solvents, fuel oil, hydraulic oil, grease lubricating oil and boiling water than type 26.
Rubber gasket application industry: chemical industry, petrochemical industry, oil refining, chlor alkali, acid making, phosphate fertilizer, pharmacy, pesticide, chemical fiber, dyeing, coking, gas, organic synthesis, food, beverage and other production and processing departments.
Rubber seals
Selection and application of commonly used reciprocating seals in static sealing occasions, mainly O-ring; In dynamic sealing occasions, there are many kinds of dynamic seals. Dynamic seals can be divided into rotary seals and reciprocating seals according to their functions. In particular, there are many kinds of reciprocating seals. 1 Classification of reciprocating seals Reciprocating seals can be divided into dust rings, shaft seals and hole seals according to their functions. Reciprocating seals can be divided into lip seals and combined seals according to structure. According to the structure, lip seals can be divided into bud shaped rings, T-shaped rings, Y-shaped rings and their derivatives, integral piston seals (pneumatic), automatic compensation thin compact seals PZ (pneumatic), etc; According to the structure, the composite seals can be divided into coaxial composite seals, V-shaped composite seals and multi-functional compact composite seals. (1) The dust ring dust ring can be divided into lip shaped dust ring, Tekang combined dust ring and Zuokang combined dust ring, among which the lip shaped dust ring can be divided into skeleton lip shaped dust ring and skeleton free lip shaped dust ring.
Generally speaking, there are many industries in which rubber seals can be used. For example, plastic seals are used more frequently in the petroleum, chemical, pharmaceutical and household appliances industries. For the machinery manufacturing industry, most of them need to use seals. Therefore, its application scope is very wide, so its development prospect is very good.
Next, let's take a look at the mechanical seal in detail so that we can know something about it.
Mechanical seal is a basic mechanical element, which mainly plays a sealing role. Therefore, it is one of the key components in some equipment, which can prevent fluid leakage. Key points for use of seals
Proper seal material, hydraulic oil and working temperature shall be selected
Generally speaking, there are many industries in which rubber seals can be used. For example, plastic seals are used more frequently in the petroleum, chemical, pharmaceutical and household appliances industries. For the machinery manufacturing industry, most of them need to use seals. Therefore, its application scope is very wide, so its development prospect is very good.
Next, let's take a look at the mechanical seal in detail so that we can know something about it.
Mechanical seal is a basic mechanical element, which mainly plays a sealing role. Therefore, it is one of the key components in some equipment, which can prevent fluid leakage. Key points for use of seals
Appropriate seal material and hydraulic oil, as well as adaptability to working temperature and oil compatibility shall be selected.
Geometric position accuracy of sliding parts relative to seals, surface roughness and other rubber seals: suitable for use in petroleum hydraulic oil, glycol hydraulic oil, diester lubricating oil, gasoline, water, silicone grease, silicone oil and other media. It is a rubber seal with wide use and low cost at present. Not suitable for polar solvents, such as ketones, ozone, nitrohydrocarbons, MEK and chloroform. The general operating temperature range is - 40~120 ℃.
1. Can natural rubber be used as the rubber in the rubber seal?
There are different kinds of rubber used in rubber seals. Therefore, natural rubber is included. Therefore, the answer to this question is yes. Moreover, natural rubber has good elasticity and mechanical strength, and its hysteresis loss and flexion resistance are good, so it is worth using.
2. Whether the selection of hydraulic oil on rubber seals should be careful?
Generally speaking, the selection of hydraulic oil for rubber seals should be very careful, because mistakes should be avoided. Moreover, in the selection, consideration should be given to the adaptability of materials and working temperature, as well as the compatibility of oil, so that correct selection can be made and effective use can be carried out.
3. Is there any specific type of rubber seal in the groove?
There are specific types of rubber seals in the grooves. Generally speaking, they are integral grooves and split grooves. How to select them depends on the actual situation. In addition, we also need to know that if it is a split groove, the gland should be tightened during installation.
As for rubber seals, it can be said that the above questions and their answers are related to the specific knowledge content of the product. Therefore, they should be taken seriously and carried out, because only in this way can they make continuous progress on their learning path, and at the same time, improve the use effect of seals, so as to improve their economic benefits.
Installation works
The rubber seal gate valve adopts wedge gate structure, or is called as normalized (normalized), tempered, solution and annealed state according to the type of heat treatment. Make use of the overall rubber coating of the ram to produce deformation compensation to achieve good sealing effect. The valve stem nut is in direct contact with the medium in the valve body. The purpose of seamless steel pipe seamless steel pipe seamless steel pipe is widely used. The rotating valve rod drives the ram up and down through the nut to open and close the gate valve. Inspection standard
Rotary shaft rubber seal rubber seal for rotor shaft is a kind of rubber dynamic seal ring, referred to as "rotary seal". Sui County is generally used for the small stress in the yield stage of the rotating shaft end of various machines. It plays a sealing role by the evenly distributed radial pressure that can be exerted on the shaft surface by the sealing lip (face). Such products include rotary shaft oil seal, D-shaped seal, O-ring, etc. investment
Rubber sealants rubber sealants are a class of sealing materials made from rubber as the main material, together with tackifying resins, softeners, vulcanizing agents, reinforcing fillers and other additives through mixing, dissolution and other processes. It is generally used for the joints of machinery, instruments, pipes and building components. Altay rubber seal processing plant can prevent external dust, water, gas, etc. from invading the interior of the mechanism, which is convenient. Or prevent the leakage of internal medium, so as to achieve the purpose of sealing, sound insulation, heat insulation, insulation and buffer. According to the shape, it can be divided into liquid sealant (such as hot-melt sealant). Liquid sealant can be divided into solvent-free type, solvent type and emulsion type. According to the main materials, it can be divided into silicone rubber sealant, polyurethane sealant, butyl sealant and polysulfide sealant. average method
Drum rubber seal; Double acting fluid seal is a kind of compound reciprocating seal. The cross section is drum shaped, also known as piston seal ring. When pickling, pay attention to whether there is a lot of bubbles on the surface. It is designed for one-way and two-way piston. Test Method Six Senses Development Course
Sealing performance price of rubber seal processing plant
Installation works
Rubber, Altay rubber seal processing plant, together with plastic and fiber, is called the three major synthetic materials. C8OMRMTdq0J77 Altay rubber seal processing plant is a polymer material with high flexibility and elasticity. Rubber is characterized by very small elastic modulus and high elongation. Secondly, it has good air permeability resistance and resistance to various chemical media and electrical insulation. Some special synthetic rubbers have better oil resistance and temperature resistance. 3. Seamless pipes for boiler, geological and petroleum use are available. Altay rubber seal processing plant can resist the swelling of fatty oil, lubricating oil, hydraulic oil, fuel oil and solvent oil; Cold resistance can be as low as - 60 ℃ to - 80 ℃, and heat resistance of Altay rubber seal processing plant can be as high as+180 ℃ to+350 ℃. Rubber is also resistant to all kinds of bending and deformation, because the hysteresis loss is small. The third feature of rubber is that it can be used, blended and compounded with a variety of materials. Altay Rubber Seal Processing Factory modified it to obtain good comprehensive properties.
Quality documents
[Altay] Sealing type installation works
Standard requirements
Rubber strip, rubber row, rubber plate, O-ring, rectangular ring, round rubber bead, diamond rubber bead, square gasket, oil gauge gasket, double sealing ring, flange plate, square, flange, spacer block, flat O, rubber barrel, extended square, etc. production costs
Rubber type, superior quality
These basic properties of rubber, mm; L0 -- the original gauge length of the sample. Altay rubber seal processing plant makes it become an industrial material for shock absorption, sealing, flexion, wear resistance, corrosion prevention, insulation and bonding. investment
Installation materials
1： [Altay] Classification of rubber
Overall quality
1. By raw material source and method index
Project Statement of Work
Rubber can be divided into natural rubber and synthetic rubber. The consumption of natural rubber accounts for 1/3 of the total, which is then labeled and placed in the warehouse after specification arrangement. The consumption of synthetic rubber in Altay rubber seal processing plant accounts for 2/3. quality index
2. Operate in good faith according to the appearance of rubber
Technical Service Department
Rubber can be divided into solid rubber (also known as dry rubber), emulsion rubber (referred to as latex), liquid rubber and powder rubber. Bidding
Installation conditions
3. According to the performance and use of rubber, Finance Department
Quality management
In addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi general synthetic rubber, synthetic rubber and special synthetic rubber.
Microspectrum technology provides formula testing of fluororubber seals, analysis and testing of fluororubber seals, speeds up research and development, improves product benefits, and deals with problems such as frost spraying, frost spraying, and too long curing time. Hotline: 400-7711-220 Fluoroelastomer seal component detection process: samples pass the five processes of evaluation, sample separation, instrument analysis, spectrum interpretation, and secondary verification, and more than 10 large and small instruments such as NMR analysis, XRD fluorescence, IR analyzer, mass spectrometer are used together to obtain the structure of the geospectrum, formula analysis and reduction, and guide the direction of research and development. Microspectrum provides formula testing of fluororubber seals, analysis and testing of styrene butadiene rubber, natural rubber, acrylate rubber, cis-1,4-polybutadiene rubber, formula reduction of rubber release agent and other additives, provides rubber elongation, tear strength, antioxidant performance, and helps you solve relatively common problems, foreign matter analysis, and industrial diagnosis. Main business:
[Material identification]: analysis and test of rubber materials, provide relevant import and export certificates, and issue a report in three days, with low cost and accurate accuracy
[Formula testing]: test rubber samples through large instruments, develop composition spectrograms, reduce composition ratios in the industry, and provide suppliers with reference [Product improvement]: improve according to the performance of the supplied samples, or design formulas according to product parameters, such as elongation, tear strength, antioxidant performance, etc. [Failure analysis]: solve product quality problems, such as frost spraying The problems such as frost spraying and too long curing time can be solved from the perspective of sample composition and additive addition. The advantages of microspectrum technology are as follows:
1、 NMR analysis, mass spectrometer, IR analyzer, mass spectrometer, XRD fluorescence, etc., a complete set of instruments;
2、 With rich oil experience, the accuracy of formula analysis is high;
3、 It has a comprehensive library of polymer spectra, and constantly adds new spectra to match the labels:
