What kind of seal or hydraulic seal are you looking for construction machine excavators or wheel loaders?
What kind of seal or hydraulic seal are you looking for construction machine excavators or wheel loaders?
The choice of sealing ring material is of great significance to its sealing performance and service life. The performance of the material directly affects the performance of the sealing ring.
What kind of seal material are you searching to fit your machines or configuration, there are NBR, HNBR, SIL, FLS, FLS, EPDM, CR, IIR, ACM, PU, Metal Rubber and so on.
Material application
1. NBR nitrile rubber sealing ring: suitable for use in petroleum hydraulic oil, glycol hydraulic oil, diester lubricating oil, gasoline, water, silicone grease, silicone oil and other media. It is the most versatile and lowest cost rubber seal. Not suitable for polar solvents, such as ketones, ozone, nitro hydrocarbons, MEK and chloroform. The general operating temperature range is -40~120 ℃.
There are more than 320 varieties and brands of nitrile rubber. It is divided according to its combined acrylonitrile amount, polymerization temperature, Mooney viscosity, physical form, processing performance and antioxidant type.
A. Classified according to the amount of combined acrylonitrile. The amount of combined acrylic rubber of commercial nitrile rubber is in the range of 18-50%, and the main brand number is 28-40%, and it is divided into 5 grades in turn.
1) Very high nitrile grade with 42% combined acrylonitrile content;
2) High nitrile grade with 36-41% combined acrylonitrile content;
3) Medium and high nitrile grade with 31-35% combined acrylonitrile;
4) Medium nitrile grade with 25-30% combined acrylonitrile;
5) Low nitrile grade with a combined acrylonitrile content of 24% or less;
B. According to the polymerization temperature, there are two types of high-temperature polymerization nitrile rubber and low-temperature polymerization nitrile rubber, which are mainly produced by low-temperature polymerization. Zhuochuang WiKi Tourists
C. According to the Mooney viscosity classification, the Mooney viscosity (ML100℃1+4) of commercial nitrile rubber is 20-140, and the main varieties and brands are 25-100.
D. According to the physical type, there are several forms of nitrile rubber in block, flake, powder or granular and liquid form.
E. According to processing and performance classification, nitrile rubber has general-purpose, easy-to-process, easy-to-dissolve, partially cross-linked, non-corrosive to metals, additive type, carboxylated nitrile rubber, polyvinyl chloride modified type, and Resin combined type is easy to accumulate stable nitrile rubber and other varieties.
F. According to the classification of antioxidants, there are pollution type, micro pollution type and non-polluting nitrile rubber. Sign meaning of variety
The meanings of the symbols of the nitrile rubber products in various countries are briefly described as follows.
a. The product brands of my country's Lanzhou Chemical Company and Cheng Rubber Factory are composed of DCJ and the suffix three-circle figures. The first two figures indicate the amount of combined acrylonitrile. According to the national standard GB5577-85, it has adopted four digits consisting of NBR and a suffix. The first two digits indicate the low limit of combined acrylonitrile, and the fourth digit indicates the ten digits of the low limit of Mooney viscosity. For example, NBR1704 means a pollution-type high temperature polymerized nitrile rubber with a combined acrylonitrile content of 17-20% and a Mooney viscosity of 40-65.
b. The product brand of American Goodrich Chemical Company consists of ycar and a four-digit suffix. The first two digits indicate the form of nitrile rubber: 10 means block, 13 means liquid, and 14 means powder. The third digit indicates the performance of nitrile rubber: 0 means standard type, 1 means easy processing type, 3 means easy dissolving type, 4 means low temperature polymerization. The fourth digit indicates the amount of combined acrylonitrile: 1 indicates high nitrile grade, 2 indicates medium high nitrile grade, 3 indicates medium nitrile grade, 4 indicates low nitrile grade, and the second two digits 72 indicate carboxyl nitrile rubber.
c. The product brand of Polysar in Canada is Nrynac, and the suffix has two combinations of three digits and four digits i. The former is divided into two series of 800 and 820, among which the 100 and 200 series are carboxylated nitrile rubber; when the latter is combined, the first two digits indicate the amount of combined acrylonitrile, and the last two digits indicate the Mooney viscosity.
d. The product brand of Japanese company ゼォン is Nipol, and there are two combinations of DN suffix three digits and N suffix two digits in the product brand. The first digit of the three-digit number of the DN suffix indicates the amount of bound acrylonitrile, 0, 1, 2, 3, and 4 indicate that the amount of bound acrylonitrile is very high, high, medium-high, medium and low, 5 grades, 5 Indicates polyvinyl chloride modified type, 6 indicates liquid nitrile rubber, and 12 indicates nitrile rubber copolymerized with EDM. The first number in the two digits of the N suffix is 2-4, which means the amount of acrylonitrile bound. The larger the number, the lower the content. The second number 0 means standard high temperature polymerization, 1 means standard low temperature polymerization, and 3 means low Viscosity is not corrosive to metals, 4 means carboxyl nitrile rubber, 2 or J attached to the second digit means nitrile rubber with good teeth and processing properties.
e. The product brand of Bayer Company in Federal Germany is PerbunanN suffixed with four digits. The first two digits indicate the amount of combined acrylonitrile, the last two digits indicate Mooney viscosity; NS indicates non-polluting type.
f. The Soviet product brand is composed of CKH and a two-digit suffix. The number indicates the amount of combined acrylonitrile, M indicates easy processing type, H indicates non-polluting type, A indicates low temperature polymerization, and C indicates that the emulsifier is mixed soap.
2. HNBR hydrogenated nitrile rubber sealing ring: It has excellent corrosion resistance, tear resistance and compression deformation resistance, and has good resistance to ozone, sunlight and weather. It has better abrasion resistance than nitrile rubber. It is suitable for washing machinery, automobile engine system and refrigeration system using new environmentally friendly refrigerant R134a. It is not recommended to use in alcohols, esters or aromatic solutions. The general use temperature range is -40~150 ℃.
3. SIL silicone rubber sealing ring: It has excellent heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. Has good insulation properties. However, the tensile strength is worse than that of general rubber and has no oil resistance. Suitable for household appliances such as electric water heaters, electric irons, microwave ovens, etc. It is also suitable for all kinds of articles that are in contact with the human body, such as kettles, drinking fountains, etc. It is not recommended to use in most concentrated solvents, oils, concentrated acids and sodium hydroxide. The general use temperature range is -55~250 ℃.
Fourth, VITON fluorine rubber seal ring: high temperature resistance is better than silicone rubber, it has excellent weather resistance, ozone resistance and chemical resistance, but poor cold resistance. It is resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils. It is suitable for the sealing requirements of diesel engines, fuel systems and chemical plants. Not recommended for use in ketones, low molecular weight esters and nitrate-containing mixtures. The general temperature range is -20~250 ℃.
5. FLS fluorosilicone rubber sealing ring: Its performance has the advantages of fluorine rubber and silicone rubber, and it has good resistance to oil, solvent, fuel oil and high and low temperature. It can resist the corrosion of oxygen-containing compounds, aromatic hydrocarbon-containing solvents and chlorine-containing solvents. Generally used for aviation, aerospace and military purposes. It is not recommended to expose to ketones and brake fluid. The general use temperature range is -50~200 ℃.
6. EPDM rubber seal ring: It has good weather resistance, ozone resistance, water resistance and chemical resistance. It can be used for alcohols and ketones, and can also be used for sealing in high temperature water vapor environment. Suitable for sanitary ware, car radiator and car brake system. Not recommended for food use or exposure to mineral oil. The general use temperature range is -55~150 ℃.
7. CR chloroprene rubber sealing ring: It is particularly resistant to sunlight and weather. It is not afraid of refrigerants such as dichlorodifluoromethane and ammonia. It is resistant to dilute acid and silicone grease, but it has a large expansion in mineral oil with low aniline point. It is easy to crystallize and harden at low temperatures. Suitable for all kinds of environments exposed to the atmosphere, sunlight, ozone, and all kinds of flame-resistant and chemical-resistant sealed environments. It is not recommended to use in strong acids, nitro hydrocarbons, esters, chloroform and ketones. The general use temperature range is -55~120 ℃.
8. IIR butyl rubber sealing ring: particularly good air tightness, heat resistance, sunlight resistance, ozone resistance, good insulation performance; good resistance to polar solvents such as alcohols, ketones, esters, etc., and can be exposed In animal and vegetable oils or oxidizable. Suitable for chemical resistance or vacuum equipment. It is not recommended to use it with petroleum solvents, kerosene or aromatic hydrocarbons. The general use temperature range is -50~110 ℃.
9. ACM acrylic rubber seal ring: It has excellent resistance to oil, high temperature resistance and weather resistance, but the mechanical strength, compression set and water resistance are slightly poor. Generally used in automobile transmission systems and power steering systems. Not suitable for hot water, brake fluid, phosphate ester. The general use temperature range is -25~170 ℃.
10. NR natural rubber sealing ring: It has good wear resistance, elasticity, breaking strength and elongation. But it is easy to age in the air, becomes sticky when exposed to heat, easily swells and dissolves in mineral oil or gasoline, and is resistant to alkali but not strong acid. It is suitable for use in liquids containing hydroxide ions such as automobile brake fluid and ethanol. The general temperature range is -20~100 ℃.
11. PU polyurethane rubber sealing ring: The mechanical properties of polyurethane rubber are very good, and the wear resistance and high pressure resistance are far better than other rubbers. The aging resistance, ozone resistance and oil resistance are also quite good, but it is easy to hydrolyze at high temperature. Generally used in high pressure and wear resistant sealing links, such as hydraulic cylinders. The general use temperature range is -45~90 ℃.
12. Metal rubber sealing ring: It is made of stainless steel wire, does not contain any rubber components, and has strong use characteristics. For example: maintain normal operation under high vacuum, high and low temperature, strong radiation, and various corrosive environments. The surface of the sealing ring is made of different materials such as stainless steel, copper, polytetrafluoroethylene and other materials according to different uses. The coated metal rubber component is used as the lining core, which has the advantages of high sealing strength, good effect, and reusability. The gasket core is a component made of different metal wire diameters and densities, suitable for different pressure occasions. The general use range is -80~800℃. Due to the high cost of this kind of sealing ring, the price is relatively expensive. But the good performance and the extensive use environment have been unanimously recognized by people.
Performance
In addition to the general requirements of the sealing ring material, the sealing ring should also pay attention to the following conditions:
(1) Full of flexibility and resilience;
(2) Appropriate mechanical strength, including expansion strength, elongation and tear resistance.
(3) The performance is stable, it is not easy to swell in the medium, and the thermal contraction effect (Joule effect) is small.
(4) It is easy to process and shape, and can maintain precise dimensions.
(5) Does not corrode the contact surface, does not pollute the medium, etc.
The most suitable and commonly used material to meet the above requirements is rubber, so most of the sealing rings are made of rubber materials. There are many types of rubber, and new types of rubber are constantly appearing. When designing and selecting, one should understand the characteristics of various rubbers and choose them reasonably.
Different materials can produce different quality hydraulic seals, oil seal, such as IDI, NOK seal, HBY, dust seal, rod seal, piston seal, SPGO, SPGW and so on. It depends on the material that you choose. If the seal is used in excavators, then it could be High temperature resistance and preservative, different environment needs to use different seals then the excavator or wheel loader or backhoe loader or crane could be workable.
For different machines there are excavator seal kits, wheel loader seal kits, backhoe loader seal kits, bulldozer seal kits, crane seal kits and so on. Take excavator seal kits for example, there are different parts seal kits, such as arm seal kits, boom seal kits, bucket seal kits, hydraulic pump seal kits, control valve seal kits, track adjuster seal kits, travel motor seal kits and so on,
If you have any material or seal request, pls feel free to visit our web http://www.wonepart.com/product-list/seal or http://www.wonepart.com/product-list/seal-kits then you could get the hydraulic seal or seal kits that you want.
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