Rubber sealing cuff for sewerage. Rubber cuffs Groove size for rubber sealing cuffs

Rubber cuffs are seals that are widely used in mechanical engineering and other industries. They provide sealing of moving joints of rotating and translational motion - for example, the piston and rod of a hydraulic cylinder. With their help, leakage of gases and liquids through the gaps between parts of machines and mechanisms is eliminated, and the penetration of dust, moisture and dirt into internal structural elements is prevented.

Types of products

Rubber cuffs are divided into several types depending on their purpose, design features and the document regulating the requirements for them:

	GOST 14896-84. Rubber cuffs produced according to this standard are characterized by the absence of reinforcement. They are designed for contact sealing of the rod and plunger in various hydraulic systems. They are used for linear relative velocities of sealed parts up to 0.5 m/s, an operating frequency of no more than 0.5 Hz and a stroke value of up to 10 m. The operating temperature range is from –60 to 200 °C, the nominal pressure is within 0. 1…50 MPa.
	GOST 6678-72. This document regulates the production of rubber unreinforced cuffs for pneumatic devices. They are designed for operation in air containing oil and fuel vapors. Withstand relative linear speed up to 1 m/s and pressure up to 1 MPa. Operating temperature range - from –65 to 150 °C.
	GOST 8752-79. The standard applies to reinforced rubber cuffs intended for sealing shafts. They can be used with working media such as water, mineral oil, diesel fuel. The pressure should not exceed 0.05 MPa, and the temperature should be within –60...70 °C. These rubber goods can be single-edged with or without a boot.
	TU 38-1051 725-86. These technical specifications introduced instead of the outdated GOST 6969-54. They regulate the requirements for cuffs used to seal the gap between the hydraulic cylinder and the piston. Products manufactured under this standard are intended for the repair and maintenance of equipment designed before 1971.

In many cases the use rubber cuffs for sealing moving joints is impractical due to the complexity and rather high cost of such products. In such situations, you can get by with a properly sized rubber O-ring. These rubber products are manufactured in accordance with the following standards:

Bart LLC presents high-quality rubber cuffs and O-rings. All products are certified for compliance state standards or technical specifications.

The main part of the production of molded rubber goods falls on 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. There are movable, fixed, contact and slot seals. 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:

1. 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;
2. 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 seals are designed to seal the gap between the cylinder and the piston (plunger, rod) in hydraulic devices operating in reciprocating motion. Hydraulic cuffs GOST 14896-84 are made of oil- and petrol-resistant rubber of group 4 (IRP-1068-1) or group 6 (B-14-1). Performance do not change at t° from -60 °C to +100 °C.

Rubber sealing cuffs in Moscow

Example symbol: 1-Dxd - 4 , Where:
1 – cuff type
D – cylinder diameter (mm)
d – rod diameter (mm)
4 – rubber group

Cuff for hydraulic devices protects parts hydraulic systems from dust and dirt, and also saves the consumption of working fluid. The cuff is used in various industrial sectors, depending on the type:

• cuff for hydraulic devices- ensures the tightness of hydraulic devices in units and machines;
• chevron sealing cuff- designed for sealing rods and cylinders in hydraulic devices operating in oil, water emulsions, sea and fresh water;
• sealing cuff for pneumatic devices- designed for sealing rods and cylinders in hydraulic devices operating under pressure conditions from 0.1 to 50 MPa, at temperatures from -65 o C to +150 o C.

Rules for the operation of rubber sealing cuffs for hydraulic systems. To extend service life cuffs for hydraulic devices and ensuring reliable sealing it is necessary:

• Check moving parts regularly for damage. If defects are detected, the surface should be treated until it meets the roughness standards. Otherwise, wear of the cuff may lead to breakage of the part and the need for repair;
• ensure the cleanliness of the parts on which the rubber sealing collar is installed. To ensure further use of the cuff, contamination must be removed in a timely manner. Otherwise, the cuff will quickly become unusable and begin to leak working fluid and dust out, which will cause rapid wear of the equipment.

Name:

"Siberia - Industrial Investments" offers high quality products manufactured in compliance with standards that exclude defects. Qualified specialists will assist you in choosing products to suit your requirements. The company's warehouses are located in Moscow. Products are delivered throughout Russia and neighboring countries.

Our company produces a wide range of rubber products for many types of equipment, including hydraulic. One of the methods for producing products is the pressing method. The company produces such products as hydraulic cuffs, wipers GOST 24811-81 and many others. Professionalism of employees and modern equipment allow the company to release quality products . You can buy products from the company, for example, chevron cuffs, in our stores.

Hydraulic seals - high quality seals

This type of rubber product is used to seal the small distance between the cylinder and the piston (plunger, rod) in hydraulic equipment operating on the principle of reciprocating movement of parts. At the same time, the main functional purpose hydraulic cuffs is a sealed connection of the cylinder. In addition, this sealing element must operate at high pressure, as well as at sufficiently high and low temperatures.
Extremely important when selecting seals for hydraulic equipment are design features cuffs, material characteristics, as well as the profile of the sealing element. All this must be taken into account when choosing a specific product. Installation locations for these sealing elements must not have nicks, cracks, nicks or other damage. Another characteristic of the cuff is its ability to automatically adjust to operating conditions, thereby reducing friction and wear.

In our company you can buy high-quality hydraulic cuffs made of rubber, GOST 14896-84 and GOST 6969-54 (the so-called collar cuffs). These products can operate in a variety of oils, water, water-oil emulsions and other working environments. If hydraulic cuffs with increased wear resistance are required, it is best to purchase products made from polyurethane. We also sell rubber cord and other similar products at our retail outlets that are used as sealing elements.
The ROST-S company, using modern equipment for the manufacture of rubber products, produces a wide range of products, for example, hydraulic cuffs and pneumatic cuffs. We are ready to produce products practically any profiles and sizes according to sketches and drawings. Our company cares about its reputation, so we guarantee our clients high quality products.