Viton seal. How to choose a seal to the shutter, a valve or reverse valve Operating conditions NBR FKM Viton

FPM (FKM) - This is manufactured by Viton Du Pont. Semi-finished product with bisphenol fluoride rubber FPM.

Properties

FPM (FKM) has high resistance to temperatures and chemicals. Temperature range: from -20 ° C to + 200 ° C (brief up to + 230 ° C). Due to the saturated structure and chemical composition, this material has excellent ozone resistance, weather effects and aging. Swelling in various media is very insignificant, also in aromatic hydrocarbons. This material can also be used in high vacuum conditions.

FPM (FKM) does not burn !!!

Sustainability data:

Basic Physics - Mechanical Features FPM (FKM)

Application area:

FPM (FKM) is used mainly in areas with high temperatures and chemicals. Moreover, FPM (FKM) is used in hydraulic systems with severely flammable hydraulic fluids of the HFD group and as a pretension element for H-PolyureThane (TPU) -plings in biologically decomposing fluids.

This polymer is based on fluorine-containing synthetic rubber, the content of fluorides in the most common gras of Viton is in the range from 66% to 70% in the total form of Viton is very resistant to hydrocarbon compounds, fuel and lubricants, gasoline, synthetic and mineral oils, but incompatible with ketones (such as acetone), organic acids (for example, acetic acid). Some modifications of the rack are concentrated inorganic acids, a hot pair, high temperatures.

Taking into account his properties, the range of its use in various industries is very wide from the chemical and petrochemical industry to large and low energy. It will not be replaced during the operation of heat exchange equipment in steam boilers and CTP.

Viton has high resistance to temperatures and chemicals. Temperature range: from -20 ° C to + 200 ° C (brief up to + 230 ° C). Due to the saturated structure and chemical composition, this material has excellent ozone resistance, weather effects and aging. Swelling in various media is very insignificant, also in aromatic hydrocarbons. This material can also be used in high vacuum conditions. Do not fuel.

Viton® is a registered ftorkuchka trademark owned by DuPont, today from all existing viton fluoroscurists is considered one of the best. In accordance with various standardization systems, the phtorus "fluorocheuk" is indicated by various abbreviations, but the material itself does not change. Abbreviation FPM - In accordance with the instructions of the International Standardization Organization (ISO), the abbreviation FKM - in accordance with the designation adopted by the American Society of Testing and Materials (ASTM). Thus, FPM is an international title, and FKM is the American name of the same material. In Russia, a reduction in CF (SCF-26, SCF-32) was adopted.

Characteristics of chemical resistance

Application area

It is used mainly in areas with high load temperatures and chemicals. Moreover, fluorine rubber is used in hydraulic systems with severely flammable hydraulic fluids of the HFD group and as a pretension element for QH-PUR - polyurethane-resistant chemicals - seals in biologically declared liquids.

PRESENTAL APPLICATION

• special seals in the chemical industry and in heat engineering
• seals shafts
• rings of round cross section
• hydraulic seals for HFD- liquids

Basic physical and mechanical characteristics

Witon is such an artificial tires - fluorochetic, characterized by high heat resistance and a low vapor selection coefficient in vacuo. Therefore, it is used as a seal at high temperatures, in vacuum seals (for a very high vacuum) and in aggressive environments.

Ecoorubber-2 (FPM, FKM, Viton, Waiton, Viton). Fluoride rubber.

Brown color.

EcoRubber 2 - Fluorukuka-based elastomer (Viton: Registered trademark of Du Pont), which is used for the manufacture of a cuff with a U-shaped cross section, cable seals, chevron packages, filled materials and special seals.

Its exceptional characteristics include high resistance to elevated temperatures, ozone, many chemical components. In addition, he is all-weather.

Ecoorubber 2 is used with oil products and lubricants containing sulfur, HFD working fluids (almost all phosphate ether and chlorinated hydrocarbons), crude oil and sulfur oil gas.

Viton fluorocus-based rubber is not a rack to the effects of anhydrous ammonia, amines, ketones, esters, hot water and low molecular weight organic acids.

Material for rings Viton, FKM, FPM

Viton is a ftorkuchka trading mark, owned by DuPont, today from all existing Viton fluorochuses is considered the best. Based on the fluorocus, they make a rubber mixture, from which, then make the item. In accordance with various standardization systems, the phrase "fluorocouette" is indicated by various abbreviations, but the material itself does not change.

Abbreviation FPM - In accordance with the instructions of the International Standardization Organization (ISO), the abbreviation FKM - in accordance with the designation adopted by the American Society of Testing and Materials (ASTM). That is, FPM is an international name, and FKM is the American name of the same material. In Russia, a reduction is made - FC.

FPM / FKM / Viton (fluorocouchum) - has high chemical resistance, as well as resistance to elevated temperature. It has excellent mechanical and physical properties, the content in the rubber mixture of fluorine provides a non-combustibility of this material. Fluoride elastomers have small gas support and minimal weight loss when working in vacuo.

Sustainable to:

fuel

aging

aggressive chemical compounds

mineral oils and fat

silicone oils and fat

oils with gray and high aromatic oils

biologically revealing hydraulic fluids

aliphatic hydrocarbons (propane, butane, gasoline)

aromatic hydrocarbons (gasoline, toluene)

chlorinated hydrocarbons

ultraviolet radiation

Not resistant to:

brake fluids on a glycol basis

organic acids, such as window and ant

flux acid

chlorosulophonic acid

ketonam (acetone, acetophenone)

red Water Couple

red-hot water par

polar solvents (acetone, methyl ethyl ketone, dioxane)

Range of operating temperatures: -20 ° C to + 200 ° C, withstands short-term heating to + 230 ° C. Fluoride rubber based on a special frost-resistant rubber Viton may stand at temperatures up to -50 ° C.

It should be borne in mind that with an increase in the temperature of seals from fluoroelastomers more than + 300 ° C, toxic gases and pairs are beginning to be released, and even after cooling, these materials are unsafe.

Fluorukhuk is high-quality heat and weather-resistant rubber having excellent resistance to ozone, oxidation, mineral oils, fuels, hydraulic fluids, aromatic and other organic solvents and chemicals.

• These applicable to seals, sealing rings, and hydraulic hoses (not only, of course):

FPM. More details

FPM. - This is a semi-finished product of rubber with bisphenol (Viton du Pont). FPM. Usually painted in brown.

Properties

FPM. It has high resistance to temperatures and chemicals. Temperature range: from 0 ° C to +200 o C (brief up to +230 o C). Due to the saturated structure and chemical composition, this material has excellent ozone resistance, weather effects and aging. Swelling in various media is very insignificant, also in aromatic hydrocarbons. This material can also be used in high vacuum conditions.
FPM. does not burn.

Sustainability data

Application area

FPM. It is used mainly in areas with high load temperatures and chemicals. Moreover, FPM. Used in hydraulic systems with severely flammable hydraulic liquids of the group HFD. and as a pretension element for seals from polyurethane in biologically decomposing liquids.

PRESENTAL APPLICATION:
- special seals in the chemical industry and in heat engineering;
- shaft seals;
- round rings;
- hydraulic seals for HFD.-Goods.

Basic Physics and Mechanical Features FPM

Viton® - This is a registered Fluorkuchka brand owned by DuPont. Based on the fluorocus, they make a rubber mixture, from which, then make a seal. In accordance with various standardization systems, the phtorus "fluorocheuk" is indicated by various abbreviations, but the material itself does not change. Abbreviation FPM - In accordance with the instructions of the International Standardization Organization (ISO), the abbreviation FKM - in accordance with the designation adopted by the American Society of Testing and Materials (ASTM). Those. FPM is an international name, and FKM is the American name of the same material. Russia adopted a reduction - FC (SCF-26, SCF-32). Viton® fluorocheau began to be released in 1957. The beginning of the production of this material made it possible to solve many problems in the main industries such as:

• Aerospace industry
• Automotive
• Chemical industry and transport
• Food and Pharmaceutical Industry
• Equipment for work in unauthorized terrain and in difficult operating conditions
• Intelligence and mining at oil and gas fields
• Recycling and transportation of oil

Basic use of fluoroelastomers - glazes, radial lumps, sealants, coatings, vibrations, compensators, gaskets, sealing rings, rod seals, cords and technistins. At the moment, the most common types of rubbers are general-purpose rubber: Viton® A, Viton® B, Viton® F. fluoride rubber based on these rubbers - resistance to oxygen-containing automotive fuels, engine oils, water-based fluids. Also, there are special purpose fluorosciences - Viton® GLT, Viton® GFLT, Viton® Extreme, Viton® Base Resistant. Types of fluorochukov:

Note: The more signs +, the better the rubber properties.

FPM / FKM / Viton® (fluorocouchum) - works well in the conditions of exposure to various aggressive liquids. Systems in which products from Viton® are used, have a higher resistance to the exposure to a wide range of chemicals. It has excellent mechanical and physical properties, the content in the rubber mixture of fluorine provides a non-combustibility of this material. Fluoride elastomers have small gas support and minimal weight loss when working in vacuo.

Types and titles of fluorocuthers: SCF, FKM, FPM, Viton and others

Fluorukhuli (FC, fluororganic rubbers, fluoroelastomers) are a large family of synthetic rubbers obtained as a result of copolymerization of fluorine-containing monomers. Due to the content of fluorine, these materials have an outstanding heat resistance, non-care and resistant to many aggressive environments. Common disadvantages of fluorocuthers are the high cost and danger of the release of toxic gases and vapors when exposed to super-high temperatures. Among the rubber FC occupy the same place as the most famous fluoropolymer, Teflon, among polymers.

These materials were actively developed and patented since the 40s of the 20th century by large chemical corporations, such as DuPont. Commercial names of new materials were widespread and became nominal. Consider the most common notation:

SCF, Fluorinated synthetic rubbers - the general designation of the Fluoroelastomer family, adopted in the USSR and Russia. Belonging to a specific group is indicated by a digital index, the brand is set by letters. For example: SCF-26, SCF-260 MPA.

FPM., Fluorinated Propylene Monomer (ISO designation), FKM, Fluorocarbon (ASTM designation, American Society Testing Materials) - General designation of vinylidenefluorfluoride fluoroelastomers (1,1-difluoroethylene, vinylidene fluoride, Vinylidenefluoride, VDF, VF2). The first material was Viton A synthesized by Dupont, a VF2 copolymer with hexafluoropropylene (HFP), then Viton B and Viton F were developed, containing tetrafluoroethylene (TFE), and a number of special brands on the same basis. Now, under the collective name, "Vitons" most often imply FPM rubbers and often use a similar classification, i.e. FPM A or FKM GLT comply with the properties of Viton A or Viton GLT made Dupont. Many manufacturers develop their brands, such as Dyneon (3M), Dai-El (Daikin), Solef (Solvay Specialty Polymers). For some of them there is no analogue in the Viton family, such as VF2 / CTFE (SCF-32, Dyneon 31508). At the same time, DuPont releases Viton Extreme (ETP), which does not contain VF2 and, thus, does not apply to FPM.

Viton® (Viton) - Dupont trading mark. This brand produces a wide range of vinylidenefluoride-based rubber (VF2) and Tetrafluoroethylene (TFE). Viton Types A, AL, B, GBL, F, GF, GLT, GBLT, GFLT are VF2 copolymers and belong to FPM (FKM) fluorobones. Viton Extreme is a copolymer of ethylene, tetrafluoroethylene (TFE), and perfluoromethilivinol ether (PMVE), does not contain VF2 and, therefore, does not relate to FPM (FKM). This rubber is also referred to as ETP (ETHYLENE, TETRAFLUOROETHYLENE (TFE), Perfluoromethylvinylether (PMVE)). The range of original Vitons is very wide, the types mentioned above are divided into brands, each of which has features in terms of temperature, mechanical or chemical properties.
.

FFKM., PerfluoroElastomer, Tetrafluoroethylene copolymer (TFE) with perfluoromethylvinyl ether (PMVE). Chemically referred to FKM (FPM). Domestic designation - SCF-460. Also known on producer brands like Kalrez (Parker Hannifin), Simriz (Freudenberg Simrit GmbH), Neofton (FSUE "Nisch").

Aflas. - Brand of ASAHI Glass CO (Japan). Under this name, two types of materials are available: Tetrafluoroethylene and propylene copolymer (TFE / P, series 100, 150, and others) and terioimetrafluoroethylene, propylene and vinylidenefluoride (TFE / P / VF2, SP, MZ201 series). After the ASAHI Glass CO first (1975) brought to the TFE / P-based fluoroscience market, the name "AFLAS" began to be applied as a commonly used name, including in Russian - Aflass. Usually in this case, the TFE / P copolymer is meant.

Features FPM (Vitone, Witons), Compatibility with media

Fluorukhuki FPM. Based on vinylidenefluoride, they have outstanding properties from the point of view of thermal and chemical stability. In this case, various types of FPM have certain features.

FPM type A. or E., Vinylidenefluoride copolymer with hexafluoropropylene (VF2 / HFP) is the oldest and most common fluoroelastomer of general use. As a rule, contains 66% fluorine. The main properties of the material are:

• high heat resistance (up to + 250 ° C), exceeding the heat resistance of all known rubber, except for siloxane;
• high weather resistance and ozone resistance;
• chemical and biological inertness, superior to these characteristics in all other elastomers;
• good wear resistance and abrasive abrasion resistance;
• satisfactory dielectric properties;
• non-flammability;
• resistance to aging at high temperatures.

This material exhibits a good resistance to the accumulation of residual deformation during compression. This type of FPM is applicable in the operating temperature range from -20 ° C to + 250 ° C, resistant to oxidizing agents and other aggressive media, oils, gasoline and solvents. Not resistant to esters and ketones, Flex fuels (Flex-Fuel) with a high content of bioethanol or MBTE, as well as to some acids.

FPM type B., terpolymervinylidene fluoride with hexafluoropropylene tetrafluoroethylene (VF2 / HFP / TFE), differs from type A content of TFE and a larger (67%) mass fraction of fluorine and exhibits better chemical resistance to acids and biofuels than type A / E.

FPM type GF. or F., terpolymer VF2 / HFP / TFE, differs from the type b a large content of fluorine (70%). It has the highest for FPM overall use of durability to biofuels other particularly aggressive media.

FPM type GLT. - Designed to improve low-temperature properties compared to traditional FPM type A / E. This type of FPM is applicable in the operating temperature range from -50 ° C to + 250 ° C. It is usually contained 65% fluorine and not racks to the effects of biofuels or aggressive solvents.

FPM type GFLT - combines the ability to operate at low temperatures (from -35 ° C) and greater than GLT, chemical resistance to biofuels and other aggressive solvents. It contains, as a rule, 68% fluorine.

FPMVF2 / CTFE., Vinylidenefluoride Copolymer (VF2) with trifluorchloroethylene (CTFE). Earlier produced and became widely known under the brand name Kel-F 3700 (Kel-F 3700). After Kellogg has been absorbed by 3m Corporation, this material entered the line of the Dyneon brand line. In the USSR and Russia are known under the SCF-32 brand. Like other FPM rubbers, there is a high heat resistance, non-hatching and resistance to many aggressive media. The operating temperature range from -20 ° C to + 200 ° C. According to the main mechanical properties of resistance to temperature and aggressive environments, VF2 / CTFE is inferior to another FPM. At the same time, this material exhibits excellent resistance to concentrated acids, including smoking nitric acid (solution with a HNO₃\u003e 86% concentration).

Below is a table of properties and compatibility of materials under the Vitone brand produced by DuPont. Marking "-s" in DuPont products means that the material is manufactured using the "Advanced Polymer Architecture" APA). Vitone Extreme (ETP-S) does not apply to FPM materials, but enters the Vitone product line. With decoding the article of the Vitone brand can be found.

FPM rubber from other manufacturers usually have a similar labeling system or provide a matching table with Dupont materials.

Relative Chemical Compatibility and Mechanical Properties Viton® Fluororelastomers

FPM application (Viton)

Fluorochuchi are used in many industries, where work is necessary in particularly difficult conditions and aggressive environments. Basic FPM consumers:

• Aerospace industry.
• Automotive.
• Chemical industry and transport.
• Food and pharmaceutical industry.
• Equipment for work in unauthorized terrain and in severe operating conditions.
• Intelligence and mining at oil and gas fields.
• Recycling and transportation of oil.

Fluorochuks are used to make such parts such as glands, cuffs, sealants, coatings, vibrations, vibrocomponentials (vibrations), gaskets, membranes, plugs, diaphragms, heat-resistant sealing rings (O-Ring), rod seals. In our assortment from this material is a rubber compensator Vitex. Fluorochuks are used in the production of sleeves, hoses and tubes for hot aggressive liquids and gases, insulation of wires and cables, containers for storing fuel, valves and other products that are in contact with oils, oxidizing agents and other aggressive environments at 200 ° C and higher. Fluorochuchi can be applied to make glue and sealants. Sealing films on this basis are not destroyed by prolonged action of oxygen and ozone, they retain elasticity at low temperatures, have high water resistance.

When choosing a type of FPM, it is necessary to take into account many factors, such as mechanical and chemical properties, characteristics of working and limit operating modes, the required fault tolerance, the ability to repair and replace. Depending on all conditions, the optimal option is selected with a suitable cost balance and characteristics.

DuPont leads the following table of applicability of Viton rubber types

FPM rubber can be coilized with natural rubber, styrene butadiene, chloroprene, silicone, etc. rubber. Adding a fluorochuch to cheaper rubber allows you to get a mixture with better chemical resistance than the original rubber. The characteristics of such mixtures are lower than that of the "pure" FPM, but this is compensated by a smaller cost.

FPM production technology (Vitona)

Fluorophers FPM are typically obtained by emulsion copolymerization of vinylidenefluoride with trifluorchloroethylene or hexafluoropropylene at a temperature of 20 ° C to 100 ° C. Although fluorumonomers are easily emulsified in water and without an emulsifier, when it is used, the polymerization rate increases and the homogeneity of the rubber obtained is improved. Most often, salts of fluorinated liquid acids are used as an emulsifier, such as ammonium perfluoroocrat.

Fluorochuchi differ from other synthetic rubbers with increased viscosity and rigidity, which creates certain difficulties in their processing. Increased viscosity and fpm rigidity are due to the characteristics of their structure - high polarity of chains, a high molecular weight of linear or weakly branched macromolecules, as well as the presence of microgel. In addition, the viscosity of fluorocuthers containing a noticeable amount of microgel increases in mechanical effects, for example, in the first minutes of rolling, as a result of the destruction of the microgel and amplification due to this intermolecular interaction.

ETP, Vitone Extreme

Viton Extreme., ETP., ethylene copolymer, tetrafluoroethylene (TFE), and perfluoromethilivinol ether (PMVE), rubber trademark manufactured by DuPont and included in the Viton rubber family. This material does not contain VF2 and formally does not relate to the FPM group (FKM). Viton Extreme contains 73.5% fluoride.

Vitone Extreme has the same resistance to the effects of temperature, acids and hydrocarbons, as well as FPM-based FPM rubbers (Other Witons). In addition, ETP has a unique resistance to a number of media incompatible with FPM, including alkalis, amines, ketones, aldehydes, low molecular weight esters (for example, methyl tert-butyl ether, MTBE).

FFKM, Kalrez, Call, SCF-460

Perfluorukhuk, FFKM exhibits a unique thermo and chemical resistance even against the background of other fluorocuthers. Also known as Kalrez (Calleps), on the trademark of DuPont, which began the release of this material in the 70s of the last century. The main feature of this material is performance in the range from -25 ° C to + 320 ° C.

The dignity of FFKM-based rubber is a small residual deformation of compression even under operating conditions at a temperature of about 250 ° C. Good mechanical properties of these rubber do not change after their exposure in air at a temperature of about 300 ° C for 1 month. FFKM contains about 75% fluorine.

FFKM is used in the chemical, food and pharmaceutical industry, the production of semiconductors. The highest resistance of FFPM allows you to use it at high temperatures in such aggressive media as lubricants of jet engines, rocket fuel components, oil wells.

DuPont Indicates that Kalrez is compatible with more than 1,800 chemical compounds. Among environments in which FFKM can work:

• Aliphatic and aromatic hydrocarbons.
• Chlorinated hydrocarbons.
• Polar solvents (ketones, esters, ethers).
• Inorganic and organic acids.
• Water and steam.
• High vacuum (with minimal weight losses).

FFKM is not compatible with:

• Fluorinated refrigerants (R11, 12, 13, 113, 114 and others).
• Perfluorine PFPE-based lubricants.
FFKM is available under the brands of SCF-460 (Russia), Kalrez (DuPont), Parafluor (Parkerhannifin), Simriz (Freudenberg Simrit GmbH), Neofton (FSUE "NIS").

FPM, ETP, FFKM properties comparison

Based on information, DuPont, you can compare the properties of FPM materials (Vitone), ETP (Vitone Extreme) and FFKM (Kalrez). Environments in which all three material work perfectly are not specified.

TFE / P, AFLAS, AFLAS

Aflas. - The trademark of ASAHI Glass Co (Japan) and the commonly used name of tetrafluoroethylene and propylene ftorufluoroethylene and propylene (Tetrafluoroethylene and Propylene, TFE / P). Two groups of materials are available: based on TFE / P (AFLAS100, 150, etc.) and based on TFE / P / VF2 (AFLAS SP, MZ201). Aflasa contain 58-60% fluoride. Rubber brand AF-15 is proposed as a domestic counterpart.

Aflasa have a unique combination of the following features:

• Resistance to high temperatures, up to + 230 ° C in long-term operation, briefly up to + 300 ° C.
• High chemical resistance to strong acids and alkalis, including at high temperatures.
• High dielectric properties (about 10 15 -10 16 Ω cm).

Aflasy are used in air, hydrocarbon fuel, mineral and synthetic oils in static (various gaskets) or dynamic friction conditions (cuffs, rings, diaphragms). These materials exhibit excellent resistance in concentrated acids (hydrochloric, fluid, sulfur, nitric), in a sharp pair (at temperatures above 200 ° C), alcohols, alkalis, hydrogen sulfide and mercaptans. Their durability in these environments in time is higher than the resistance of vulcanizates based on other fluorochurs. Detailed information of the chemical resistance of different AFLAS® brands can be found. These materials may be a rack to low temperatures, the glass transition temperature depending on the rubber brand is in the range from -35 ° C to -2 ° C. At low temperatures, rabbanisats based on aflas become rigid, but not fragile and are not destroyed, which is the unique property of this material.

In oil production, items from aflas work perfectly when exposed to high-surface oil and gas, amine corrosion inhibitors, high-grade drilling rigs, for hardening in water-based wells, acids for hydraulic. RTI from aflas is used in steam injection unit in the reservoir and geothermal regions. In the automotive industry, they can be used in the cooling system at high engine cooling fluid temperatures with corrosion inhibitor, lubricant materials, glycolic brake fluids and new types of engine oils. Aflasa are used in the energy, cellulosobum and chemical industry. Due to the high insulating properties at high temperatures, interest is of interest to the cable industry.

Aflasa are poorly compatible with aromatic hydrocarbons, ketones, chlorinated hydrocarbons. An obstacle to the widespread use of elastomeric compositions based on fluorine tutor data is the difficulty of processing using traditional technologies.