Hydraulic cuffs. Types of cuffs and seals, their markings What does up mean on a rubber cuff
The main part of the production of molded rubber goods is accounted for sealing devices, on which the performance and reliability of components and mechanisms, sealing and sealing of joints, seams and all kinds of connections depend. The purpose of seals is to prevent or reduce leaks of liquid or gas in connections of machine parts, pipelines and other systems. Seals can be movable, fixed, contact or slotted. They can have a complex cross-section profile to ensure tightness and the required speed of operation of the mechanism, reduce heating of the working fluid in the system, and protect against the penetration of foreign substances into technical device and preventing external leaks of working fluid. Depending on the chemical composition And physical properties rubber seals can be successfully used in a wide variety of conditions and are used in all industries. Movable contact seals include O-rings, lip seals and other types of special seals. For example, ring seals manufactured in accordance with GOST 9833–73 are designed for reliable operation in hydraulic systems at pressures up to 32 MPa, in fixed joints – up to 50 MPa. With more high blood pressure working fluid in the system, it is recommended to use rubber cuffs.
Types of cuffs
Provides tightness in hydraulic devices ah for machines and components (GOST 6969–54, TU 38-1051725-86)
Examples of notation: Cuff 80x100 GOST 6969-54 - cuff for sealing a cylinder with a diameter of 100 mm, a rod with a diameter of 80 mm
Provides sealing of the gap between the cylinder and the piston at a pressure from 0.1 to 50 MPa with a reciprocating motion speed of no more than 0.5 m/s at a temperature from – 60C to + 200C (GOST 14896–84, GOST 6969–54). Depending on the design and the value of the operating pressure, three types are made
Examples of notation: Cuff 1-20x12-4 GOST 14896-84 - cuff type 1 for sealing a cylinder with a diameter of 20 mm, a rod with a diameter of 12 mm made of group 4 rubber
Serves to seal rods and cylinders of hydraulic devices operating in mineral oil, petroleum, fresh and sea water, aqueous emulsions at pressures up to 63 MPa at temperatures from –50 to +120 °C with a reciprocating speed of up to 3 m/s. These cuffs are installed complete with metal support and pressure rings (GOST 22704–77)
Examples of notation: Support ring KO 70x95-2 GOST 22704-ring internal diameter 70 mm, outer diameter 95 mm made of rubber group 2
Examples of notation: Chevron cuff M 70x95-2 GOST 22704 - cuff with an internal diameter of 70 mm, an outer diameter of 95 mm made of group 2 rubber
Examples of notation: Pressure ring KN 70x95-2 GOST 22704 - ring with an internal diameter of 70 mm, an external diameter of 95 mm made of group 2 rubber
Designed for sealing cylinders and rods of pneumatic devices operating at pressures from 0.005 to 1 MPa at temperatures from –65 to +150 °C with a reciprocating speed of up to 1 m/s (GOST 6678-72). There are two types - type 1 (for cylinder seal) and type 2 (for rod seal)
Examples of notation: Sealing cuff 1-025-3 GOST 6678-72 - cuff type 1 for a cylinder with a diameter of 25 mm made of group 3 rubber
Examples of notation: Sealing cuff 2-010-1 GOST 6678-72 - cuff type 2 for a rod with a diameter of 10 mm made of group 1 rubber
For sealing rotating shafts operating under more severe operating conditions in mineral oil, water, diesel fuel, at excess pressure up to 0.05 MPa, temperatures from -60 to +170 (depending on the rubber group) and rotation speeds up to 40 m/s are used reinforced rubber cuffs (GOST 8752–79). Such cuffs are also called oil seals. These cuffs are reinforced with a metal ring and a round spring. The metal of the ring is in a layer of rubber, does not react with an aggressive environment and strengthens general design, and the spring presses the working edge of the cuff towards the shaft. Certain types of cuffs may be made from fluorine rubber And silicone rubber. This allows you to use reinforced cuffs in a wide range of operating parameters under exceptional loads under the influence of the most aggressive environments.
Available in two types:
I — single-edged (to prevent leakage of the sealed medium);
II — single-edge with boot (to prevent leakage of the sealed medium and protect against dust penetration)
Manufactured in two versions: 1. with a machined edge (cut edge); 2. with molded working edge.
Examples of notation: Cuff 2.1-60*80-4 GOST 8752–79 - cuff type 2, version 1, for a shaft with a diameter of 60 mm with an outer diameter of 80 mm made of group 4 rubber
Notes:
- The letter “C” means that the suitability of rubber for sealing a given group of media is determined by agreement between the manufacturer and the customer;
- The sign “-” means that the elastomer is not suitable for sealing in the specified group of environments.
All Harprompolymer LLC are produced in accordance with GOST 8752-79.
Hydraulic sealing collars are designed to seal the joints between the surfaces of mating parts and housings or other elements. Their use helps prevent contamination of critical surfaces and prevent leakage of working fluids. Cuffs are used in a variety of mechanisms - from slowly moving units to devices with high rotation speeds. They are designed to work in a wide range temperature range: from subzero temperatures up to +260 °C. Acceptable operating pressure is in the range from 0.25 to 32 MPa.
Working environment
oil
Example symbol:
50x300-3
Cuff for sealing cylinder Ø 50 mm, rod Ø 30 mm, made of rubber, gr. 3, works in an oil environment, at temperatures from - 30 to + 50 o C.
Main Dimensions
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standard size |
standard size |
standard size |
standard size |
***By agreement, it is possible to consider manufacturing cuffs non-standard sizes made of polyurethane.
Machines operating in aquatic environments experience severe stress. Sealing collars for hydraulic devices are an integral part of such devices. Sealing cups ensure tightness between moving and static parts of mechanisms operating in air, water, and oil environments. Rubber sealing cuffs for hydraulic devices are manufactured at the UGRT plant and sold at attractive prices.
Materials and design
The most widely used sealing cuffs are made of rubber; polyurethane is also used for these purposes. Sometimes manufacturers add polymer substances to the composition, which increase the rigidity and wear resistance of products and help extend their service life. When choosing a specific material, it is necessary to take it into account technical properties, temperature regime, pressure and other parameters of the work process. Modern sealing elements are prefabricated products consisting of several components. In some cases, they may contain spring elements in order to provide a tighter fit to the surface and hold viscous materials. These elements are designed to work with oils, which allows them to be used on almost any equipment.Collar cuffs are produced in accordance with GOST 14896-84, GOST 6969-54 or TU 38-1051725-86. Serve as seals for hydraulic cylinders, sleeves, rods. Retain functional properties at temperatures from -300C to + 500C at high pressure. They are effectively used with mechanisms with reciprocating movements.
Features and Benefits
Sealing collars for hydraulic devices have a number of features. Their main advantages are:- High elasticity and elasticity of the material;
- Ability to withstand repeated temperature changes within established operating limits;
- High strength, long service life.
Our company is engaged in the production and sale sealing elements standard sizes. If necessary, it is possible to produce elements of non-standard sizes from polyurethane. To place an order, just order a phone call through the form on the website, and our managers will call you back in a few minutes.
Types of products produced:
The company produces the following types of collars:
- Roofing (corner) - used as a sealant when installing chimney pipes, antennas, ventilation. Consists of a silicone membrane, suitable for corrugated roofs. Withstands heavy rains and snowfalls.
- For sewerage - provide a transition from cast iron to plastic pipes. The best known is the coupling with a diameter of 110 millimeters, as well as the Swiss Straub couplings.
- Oil seals (reinforced) - designed to seal the shafts of cars and various mechanisms operating in oils and fuel. Used in pharmaceuticals, agriculture, petrochemical, food industry An example of an oil seal made according to international standards - DIN 3760.
- For washing machines- rubber rings used to seal the hatch.
- Direct - connect the toilet to the sewer.
Product sizes:
The UGRT plant produces materials of different sizes, the smallest of which are 14x6 mm, and the largest - 570x540. These data are presented in a table on the company's website.
Buy quality products from UGRT
The plant's products can be purchased at affordable prices excellent quality, as confirmed by relevant certificates. Customers are provided necessary consultation from experienced employees for the purpose of selecting materials optimal sizes. Provides delivery to all cities Russian Federation and CIS.
Hydraulic cuffs used in different types of hydraulic systems to seal the gaps between the cylinder and the piston (plunger and rod). Since hydraulic mechanisms operate using energy from fluid, they must have high stability to exposure to various liquids. Typically, energy carriers in hydraulic systems can be the following fluids:
Mineral oils
Synthetic oils
Semi-synthetic oils
Water-oil emulsions
Silicone based liquids
Glycol based fluids
Liquids based on an alcohol-castor mixture
In many cases, special additives are additionally added to hydraulic fluids. For example, this could be viscosity additives for thickening liquids. Additives against oxidation, corrosion or foam are also found. Additives are often added to protect the hydraulic system from wear. That's why rubber sealing collars for hydraulic devices Produced from sustainable grades of rubber compounds.
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Rubber group |
Tire brand |
Temperature |
Rubber group |
Tire brand |
Temperature |
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10°С +200°С |
30°С +100°С |
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10°С +150°С |
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30°С +100°С |
30°С +100°С |
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30°С +100°С |
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30°С +100°С |
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40°С +100°С |
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45°С +130°С |
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Naturally, each brand of rubber is strictly suitable for certain operating conditions. Should not be used hydraulic cuffs for a long time of operation at the maximum permissible values of operating temperature, speed, pressure and frequency of operation, as this will entail rapid wear of the product. Rubber seals for hydraulic devices operate under the following conditions:
Characteristics hydraulic cuffs
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Hydraulic cuffs GOST 14896-84 |
Hydraulic cuffs GOST 6969-54 |
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Pressure |
From 0.1 MPa to 50 MPa |
Pressure |
From 0.25 MPa to 32 MPa |
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Temperature |
From -45°С to +200°С |
Temperature |
From -35°С to +100°С |
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Working stroke |
Working stroke |
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Speed |
Speed |
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Hydraulic cuffs have several different types structural design. Depending on the specific type of structure hydraulic seal sizes are changing. In addition, the type of execution also affects specifications products. For example, in different options structural design rubber sealing cuffs for hydraulic devices operate at different operating pressure ranges.
Hydraulic cuff GOST 14896-84
To date hydraulic cuffs have one interstate standard for production. This standard is GOST 14896-84. By GOST 14896-84 hydraulic cuff can be made from a rubber base or polyurethane.
Hydraulic cuff GOST 14896-84 has several different forms release, each of which has a unique design and dimensions. Actually, depending on the design, rubber cuffs are divided into the following 3 types:
Hydraulic seal for pressures from 0.1 to 50 MPa (type 1)
Hydraulic seal for pressures from 0.25 to 32 MPa (type 2)
Hydraulic seal for pressures from 1.0 to 50 MPa (type 3)
Hydraulic cuffs GOST 14896-84 Type 2 is not currently available. Instead, it is customary to use interchangeable cuffs of type 3 or hydraulic cuffs of a similar design and size, but manufactured in accordance with TU 38-1051725-86.
Dimensions of hydraulic cuffs GOST 14896-84
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Dimensions of hydraulic cuffs GOST 14896-84 type 1 |
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Hydraulic cuff 1-12x4 |
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Hydraulic cuff 1-13x5 |
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Hydraulic cuff 1-14x6 |
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Hydraulic cuff 1-16x8 |
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Hydraulic cuff 1-18x10 |
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Hydraulic cuff 1-20x12 |
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Hydraulic cuff 1-22x14 |
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Hydraulic cuff 1-25x15 |
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Hydraulic cuff 1-26x16 |
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Hydraulic cuff 1-28x18 |
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Hydraulic cuff 1-30x20 |
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Hydraulic cuff 1-32x22 |
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Hydraulic cuff 1-35x25 |
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Hydraulic cuff 1-36x26 |
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Hydraulic cuff 1-37x27 |
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Hydraulic cuff 1-38x28 |
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Hydraulic cuff 1-40x30 |
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Hydraulic cuff 1-42x32 |
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Hydraulic cuff 1-45x35 |
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Hydraulic cuff 1-46x36 |
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Hydraulic cuff 1-50x40 |
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Hydraulic cuff 1-55x45 |
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Hydraulic cuff 1-56x46 |
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Hydraulic cuff 1-63x48 |
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Hydraulic cuff 1-60x50 |
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Hydraulic cuff 1-70x55 |
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Hydraulic cuff 1-71x56 |
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Hydraulic cuff 1-78x63 |
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Hydraulic cuff 1-80x65 |
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Hydraulic cuff 1-85x70 |
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Hydraulic cuff 1-90x75 |
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Hydraulic cuff 1-100x80 |
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Hydraulic cuff 1-110x90 |
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Hydraulic cuff 1-120x100 |
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Hydraulic cuff 1-125x105 |
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Hydraulic cuff 1-130x110 |
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Hydraulic cuff 1-140x120 |
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Hydraulic cuff 1-145x125 |
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Hydraulic cuff 1-160x140 |
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Hydraulic cuff 1-180x160 |
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Hydraulic cuff 1-200x180 |
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Hydraulic cuff 1-220x200 |
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Hydraulic cuff 1-240x220 |
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Hydraulic cuff 1-250x230 |
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Hydraulic cuff 1-270x250 |
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Hydraulic cuff 1-280x260 |
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Hydraulic cuff 1-300x280 |
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Hydraulic cuff 1-320x300 |
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Hydraulic cuff 1-340x320 |
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Hydraulic cuff 1-360x335 |
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Hydraulic cuff 1-385x360 |
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Hydraulic cuff 1-400x375 |
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Hydraulic cuff 1-425x400 |
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Hydraulic cuff 1-450x400 |
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Hydraulic cuff 1-475x450 |
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Hydraulic cuff 1-500x475 |
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Hydraulic cuff 1-525x500 |
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Hydraulic cuff 1-560x530 |
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Hydraulic cuff 1-590x560 |
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Hydraulic cuff 1-630x600 |
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Hydraulic cuff 1-660x630 |
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Hydraulic cuff 1-710x670 |
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Hydraulic cuff 1-750x710 |
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Hydraulic cuff 1-800x760 |
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Hydraulic cuff 1-840x800 |
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Hydraulic cuff 1-900x850 |
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Hydraulic cuff 1-950x900 |
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Dimensions of hydraulic cuffs GOST 14896-84 type 3 |
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Hydraulic cuff 3-12x4 |
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Hydraulic cuff 3-13x5 |
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Hydraulic cuff 3-14x6 |
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Hydraulic cuff 3-16x8 |
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Hydraulic cuff 3-18x10 |
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Hydraulic cuff 3-22x10 |
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Hydraulic cuff 3-20x12 |
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Hydraulic cuff 3-24x12 |
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Hydraulic cuff 3-25x13 |
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Hydraulic cuff 3-22x14 |
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Hydraulic cuff 3-30x14 |
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Hydraulic cuff 3-24x16 |
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Hydraulic cuff 3-28x16 |
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Hydraulic cuff 3-32x16 |
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Hydraulic cuff 3-30x18 |
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Hydraulic cuff 3-32x20 |
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Hydraulic cuff 3-36x20 |
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Hydraulic cuff 3-40x20 |
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Hydraulic cuff 3-38x22 |
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Hydraulic cuff 3-42x22 |
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Hydraulic cuff 3-36x24 |
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Hydraulic cuff 3-40x24 |
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Hydraulic cuff 3-45x25 |
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Hydraulic cuff 3-47x27 |
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Hydraulic cuff 3-48x28 |
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Hydraulic cuff 3-50x30 |
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Hydraulic cuff 3-52x32 |
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Hydraulic cuff 3-56x36 |
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Hydraulic cuff 3-60x40 |
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Hydraulic cuff 3-63x43 |
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Hydraulic cuff 3-65x45 |
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Hydraulic cuff 3-75x45 |
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Hydraulic cuff 3-70x50 |
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Hydraulic cuff 3-75x50 |
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Hydraulic cuff 3-80x50 |
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Hydraulic cuff 3-80x55 |
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Hydraulic cuff 3-76x56 |
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Hydraulic cuff 3-81x56 |
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Hydraulic cuff 3-86x56 |
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Hydraulic cuff 3-80x60 |
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Hydraulic cuff 3-90x60 |
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Hydraulic cuff 3-83x63 |
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Hydraulic cuff 3-88x63 |
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Hydraulic cuff 3-93x63 |
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Hydraulic cuff 3-90x65 |
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Hydraulic cuff 3-90x70 |
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Hydraulic cuff 3-95x70 |
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Hydraulic cuff 3-100x70 |
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Hydraulic cuff 3-100x75 |
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Hydraulic cuff 3-100x80 |
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Hydraulic cuff 3-105x80 |
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Hydraulic cuff 3-110x80 |
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Hydraulic cuff 3-110x85 |
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Hydraulic cuff 3-120x90 |
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Hydraulic cuff 3-125x95 |
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Hydraulic cuff 3-130x100 |
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Hydraulic cuff 3-140x110 |
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Hydraulic cuff 3-155x125 |
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Hydraulic cuff 3-160x130 |
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Hydraulic cuff 3-170x140 |
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Hydraulic cuff 3-180x150 |
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Hydraulic cuff 3-190x160 |
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Hydraulic cuff 3-200x170 |
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Hydraulic cuff 3-210x180 |
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Hydraulic cuff 3-220x180 |
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Hydraulic cuff 3-220x190 |
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Hydraulic cuff 3-230x200 |
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Hydraulic cuff 3-240x200 |
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Hydraulic cuff 3-250x210 |
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Hydraulic cuff 3-260x220 |
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Hydraulic cuff 3-280x240 |
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Hydraulic cuff 3-290x250 |
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Hydraulic cuff 3-320x280 |
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Hydraulic cuff 3-360x320 |
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Hydraulic cuff 3-400x360 |
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Hydraulic cuff 3-440x400 |
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Hydraulic cuff 3-450x410 |
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Hydraulic cuff 3-490x450 |
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Hydraulic cuff 3-500x460 |
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Hydraulic cuff 3-540x500 |
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Depending on the material of manufacture, hydraulic cuffs GOST 14896-84 can withstand the following substances:
Mineral, synthetic, semi-synthetic oils
Fuel cells: gasoline, fuel oil, oil
Oil based greases
Vegetable and animal oil
Vegetable and animal fat
Brake fluids
Soap solutions
Hot water
Example of marking (symbol) of rubber cuffs
Hydraulic cuff GOST 6969-54
Features a unique hem design similar to a collar. Due to this visual similarity rubber sealing collar GOST 6969-54 in many industries it is called collar cuff.
Hydraulic cuff GOST 6969-54 was developed to seal the gaps between the piston and cylinder (plunger and rod) in a variety of various types hydraulic systems (machines and mechanisms), the shaft diameter of which does not exceed 300 millimeters.
Hydraulic cuff GOST 6969-54 intended for equipment designed before 1971. This manufacturing standard has now been invalidated and rubber sealing hydraulic cuffs They haven’t produced it for a long time!
To replace the standard GOST 6969-54 another standard has arrived - GOST 14896-74, in which structural type 2 was used as the design of the collar cuff. However, at present this type of design is also not produced according to this standard.
Instead of this standard it is customary to use technical specifications TU 38-1051725-86. Overall standard TU 38-1051725-86 implies exactly the same design parameters and dimensions as the standard GOST 6969-54 . The dimensions of the hydraulic cuff are:
Dimensions of hydraulic cuffs GOST 6969-54
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Dimensions of hydraulic cuffs GOST 14896-84 type 2 |
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Cuff GOST 6969-54 6x14 |
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Cuff GOST 6969-54 8x16 |
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Cuff GOST 6969-54 10x19 |
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Cuff GOST 6969-54 10x19 |
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Cuff GOST 6969-54 10x19 |
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Cuff GOST 6969-54 10x22 |
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Cuff GOST 6969-54 10x25 |
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Cuff GOST 6969-54 12x20 |
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Cuff GOST 6969-54 12x24 |
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Cuff GOST 6969-54 14x22 |
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Cuff GOST 6969-54 14x30 |
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Cuff GOST 6969-54 16x24 |
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Cuff GOST 6969-54 16x28 |
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Cuff GOST 6969-54 16x32 |
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Cuff GOST 6969-54 18x30 |
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Cuff GOST 6969-54 19x35 |
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Cuff GOST 6969-54 20x32 |
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Cuff GOST 6969-54 20x35 |
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Cuff GOST 6969-54 20x36 |
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Cuff GOST 6969-54 20x40 |
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Cuff GOST 6969-54 22x38 |
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Cuff GOST 6969-54 22x42 |
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Cuff GOST 6969-54 24x40 |
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Cuff GOST 6969-54 25x45 |
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Cuff GOST 6969-54 28x48 |
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Cuff GOST 6969-54 30x50 |
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Cuff GOST 6969-54 32x52 |
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Cuff GOST 6969-54 35x55 |
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Cuff GOST 6969-54 38x58 |
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Cuff GOST 6969-54 40x60 |
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Cuff GOST 6969-54 42x62 |
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Cuff GOST 6969-54 45x65 |
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Cuff GOST 6969-54 45x75 |
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Cuff GOST 6969-54 48x68 |
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Cuff GOST 6969-54 50x70 |
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Cuff GOST 6969-54 50x75 |
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Cuff GOST 6969-54 50x80 |
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Cuff GOST 6969-54 52x72 |
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Cuff GOST 6969-54 55x75 |
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Cuff GOST 6969-54 55x80 |
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Cuff GOST 6969-54 60x80 |
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Cuff GOST 6969-54 60x85 |
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Cuff GOST 6969-54 60x90 |
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Cuff GOST 6969-54 65x85 |
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Cuff GOST 6969-54 65x90 |
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Cuff GOST 6969-54 65x90 |
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Cuff GOST 6969-54 70x90 |
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Cuff GOST 6969-54 70x95 |
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Cuff GOST 6969-54 70x100 |
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Cuff GOST 6969-54 75x95 |
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Cuff GOST 6969-54 75x100 |
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Cuff GOST 6969-54 75x105 |
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Cuff GOST 6969-54 80x100 |
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Cuff GOST 6969-54 80x105 |
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Cuff GOST 6969-54 80x105 |
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Cuff GOST 6969-54 80x110 |
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Cuff GOST 6969-54 85x110 |
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Cuff GOST 6969-54 90x120 |
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Cuff GOST 6969-54 95x125 |
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Cuff GOST 6969-54 100x130 |
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Cuff GOST 6969-54 105x135 |
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Cuff GOST 6969-54 110x140 |
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Cuff GOST 6969-54 120x140 |
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Cuff GOST 6969-54 120x150 |
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Cuff GOST 6969-54 125x155 |
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Cuff GOST 6969-54 130x160 |
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Cuff GOST 6969-54 140x170 |
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Cuff GOST 6969-54 150x180 |
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Cuff GOST 6969-54 160x190 |
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Cuff GOST 6969-54 170x200 |
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Cuff GOST 6969-54 180x210 |
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Cuff GOST 6969-54 180x220 |
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Cuff GOST 6969-54 190x220 |
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Cuff GOST 6969-54 200x230 |
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Cuff GOST 6969-54 200x240 |
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Cuff GOST 6969-54 210x250 |
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Cuff GOST 6969-54 220x260 |
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Cuff GOST 6969-54 240x280 |
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Cuff GOST 6969-54 250x290 |
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Cuff GOST 6969-54 260x300 |
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Cuff GOST 6969-54 280x320 |
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Cuff GOST 6969-54 300x340 |
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Cuff GOST 6969-54 310x340 |
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Cuff GOST 6969-54 400x430 |
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Cuff GOST 6969-54 425x450 |
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Cuff GOST 6969-54 500x530 |
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Hydraulic cuffs GOST 6969-54 (TU 381051725-86) are resistant to the following environments and substances:
Solar radiation
Low and high temperatures
Frictional effects
Aging
Fuel cells