China Xingtai Chengzhi Seals Co., Ltd. Company News

O-ring O-ring (O-rings) is a kind of rubber sealing ring with a circular cross-section. Because its cross-section is O-shaped, it is called an O-ring rubber sealing ring, also called an O-ring. It began to appear in the mid-19th century, when it was used as a sealing element for steam engine cylinders. O-rings are the most common mechanical design for seals because of their low cost, simplicity of manufacture, reliable function, and simple installation requirements. O-rings are subjected to pressures of tens of megapascals (kilo pounds). O-rings can be used in static applications as well as in dynamic applications where there is relative movement between components, such as shafts of rotary pumps and pistons of hydraulic cylinders.     YX O-ring for hole Product use: used for the sealing of pistons in reciprocating hydraulic cylinders. Scope of application: TPU: general hydraulic cylinder, general equipment hydraulic cylinder. CPU: Hydraulic cylinders for construction machinery and oil cylinders for high temperature and high pressure. Material: Polyurethane TPU, CPU, Rubber. Product hardness: HS85±2°A Working temperature: TPU:-40~+80℃, CPU:-40~+120℃ Working pressure: ≤32Mpa Working medium: hydraulic oil, emulsion. Baffle O-ring for YX type hole Product use: This standard is suitable for use with YX type sealing ring when the working pressure of the oil cylinder is greater than 16MPa, or when the oil cylinder is eccentrically stressed, it plays the role of protecting the sealing ring. Working temperature: -40~+100 degrees. Working medium: hydraulic oil, emulsion, water Product hardness: HS 92±5A Material: PTFE. YX type O-ring for shaft Product use: used for the sealing of piston rods in reciprocating hydraulic cylinders Scope of application: TPU: general hydraulic cylinders, general equipment hydraulic cylinders. CPU: Hydraulic cylinders for construction machinery and oil cylinders for high temperature and high pressure. Material: Polyurethane TPU, CPU, rubber Product hardness: HS85±2°A Working temperature: TPU:- 40~+80℃ CPU:-40~+120℃ Working pressure: ≤32Mpa, working medium: hydraulic oil, emulsion. The O-ring has excellent sealing performance and long working life. The working life of dynamic pressure seal is 5-10 times higher than that of conventional rubber sealing products, and can be up to dozens of times. Under certain conditions, it can have the same life as the sealing base. The frictional resistance of the O-ring is small, and the dynamic and static frictional forces are equal, which is 1/2-1/4 of the frictional force of the "0"-shaped rubber ring, which can eliminate the "crawling" phenomenon of movement at low speed and low pressure. The O-ring is highly wear-resistant, and has an automatic elastic compensation function after the sealing surface is worn. O-ring good self-lubricating performance. Can be used for oil-free lubrication seal. O-ring The O-ring has a simple structure and is easy to install. O-ring working pressure: 0-300MPa; working speed: ≤15m/s; working temperature: -55-250 degrees. O-ring applicable medium: hydraulic oil, gas, water, mud, crude oil, emulsion, water-glycol, acid.

O-rings are usually selected as large-section O-rings as much as possible. Under the same gap, the volume of the O-rings squeezed into the gap should be smaller than the maximum allowable value.     O-rings are annular rubber seals with a circular cross-section, which are mainly used for mechanical parts to prevent leakage of liquid and gaseous media under static conditions. In some cases, the O-ring can also be used as a dynamic sealing element for axial reciprocating motion and low-speed rotary motion. According to different conditions, different materials can be selected to suit it. O-ring seals are the most common form of sealing used in fluid power systems. They work well in many fluid power systems, but they must be used with care and care. O-rings only work when they are deformed. An O-ring is shaped like an O-ring, it is installed in the seal groove and then pressed so that there is no gap in the seal groove to seal off liquid or air flow. Although this simple sealing structure works well in fluid power systems, it can only be achieved with careful design, careful selection, and proper installation.   2. Reasons and countermeasures for the failure of O-ring seals (1) Installation damage Failure state: Part or all of the sealing ring has a neat wound. Causes of failure: sharp edges and corners of grooves and other components, improper size of seals; too low hardness or elasticity of seals; dirt on the surface of seals. Solution: remove sharp edges and corners; make groove design more reasonable; choose seals with appropriate size; choose seals with greater elasticity and higher hardness. (2) Curl failure state: The O-ring is obviously curled. Failure reasons: caused by installation, the movement speed is too low, the material is too hard or the elasticity is too small, the surface treatment of the O-ring is uneven, the groove size is uneven, the groove The groove surface is rough and the lubrication is insufficient. Solution: Install it correctly, select high elastic materials, properly improve the design of the groove and the surface finish, and use the support ring as much as possible. (3) Excessive compression Failure state: The contact surface of the O-ring is flat and deformed, and may be accompanied by cracks. Failure reason: The design is unreasonable, and the deformation of the material due to heat and chemical media, or the deformation caused by excessive pressure is not considered. Solution: The design of the groove should take into account the deformation of the material due to temperature and chemical media. (4) Permanent compressive deformation Failure state: The contact surface of the seal exhibits plane permanent deformation. Failure reasons: too high pressure; too high temperature; the material has not completed the vulcanization treatment; the permanent deformation rate of the material itself is too large; the material is excessively expanded in the chemical medium. Solution: Select materials with low deformation rate; appropriate groove design; confirm that the material is compatible with the medium. (5) Failure state of chemical corrosion damage: chemical corrosion can cause various defects of O-ring seals, such as blistering, cracking, small holes, or discoloration, etc. Sometimes chemical corrosion can only be known by measuring its physical properties with instruments . Failure reason: The material does not match the medium or the temperature is too high. Solution: Choose a material that is more resistant to chemical media corrosion. (6) Damage Failure state: The O-ring seal is damaged by wear in all or part of the sealing area, and particles of material wear can be found on the sealing surface. Reasons for failure: The surface finish of the seal is not enough, the temperature is too high, the sealing environment enters into the highly abrasive sundries, the seal produces relative movement, and the surface treatment of the seal is not thorough. Solution: Improve the groove finish, choose self-lubricating materials, and clear the parts and environment that cause wear. (7) Blasting failure state: bubbles, pits and scars appear on the surface of the O-ring; when the pressure is very high, the material absorbs the gas in the medium, and when the pressure suddenly decreases, the gas absorbed by the material runs out quickly, causing the O-ring seal Ring skin blasting. Cause of failure: The pressure changes too fast, and the hardness and elasticity of the material are too low. Solution: Choose a material with higher hardness and better elasticity to reduce the speed of decompression. (8) Debris contamination Failure state: There are foreign objects in the section of the O-ring. Failure reason: The production process is polluted by the environment, the material is corroded or reacted, and the material is non-semiconductor industry grade material. Solution: indicate the cleanliness required for production and packaging, and strengthen environmental control during the production, transportation and use of O-rings. (9) Hot corrosion Failure state: The high temperature contact surface of the O-ring shows radial cracks, and some materials may become soft, or the material may become shiny due to excessive temperature. Failure reasons: The material cannot withstand high temperatures, or the temperature exceeds the design temperature, or the temperature changes too quickly and frequently.

(Spring 2025) National Motorcycle and Accessories Exhibition and Trade Fair - Kunming Dianchi International Convention and Exhibition CenterTime: May 10-12, 2025Address: Huanhu East Road, Guandu District, Kunming City, Yunnan ProvinceBooth: 5 - 5109XINGTAICHENGZHISEAL CO.,LTD. Welcome to visit

O-rings can be used both as sealing elements and as force-applying elements for hydraulic sliding seals and wipers, so they are widely used in various applications. It can be said that in the industrial field, whether it is a single seal for repair and maintenance, or applications such as aerospace, automotive and general industries that require quality assurance, there is no O-ring not used. Type 0 seals dominate static sealing applications: 1. Used as a radial static seal, for example: for the seal of shaft sleeves, sealing covers, pipes, oil cylinders, etc. 2. Used as an axial static seal, such as seals for flanges, plates and end caps. For dynamic applications, O-ring diagrams are only recommended for moderate load conditions. Limited by speed and pressure, O-ring diagrams are generally used for: 1. Sealing of reciprocating pistons, piston rods and plungers under low load conditions. 2. Seals during low-speed rotation or helical motion on shafts, mandrels and rotary power input shafts.

1. Receive a fixed number of oil seals. 2. The oil seal must be kept clean from receipt to assembly. 3. Before assembling, check the oil seal and measure whether the dimensions of each part of the skeleton oil seal are consistent with the dimensions of the shaft and the cavity. Before installing the skeleton oil seal, firstly compare the size of the shaft diameter with the inner diameter of the oil seal. . The size of the cavity should be compatible with the outer diameter and width of the oil seal. Check whether the lip of the skeleton oil seal is damaged or deformed, and whether the spring is detached or rusted. Prevent the oil seal from laying flat during transportation, and being squeezed and impacted by external forces, which will destroy its roundness. 4. Before assembly, do the machining inspection procedure, measure whether the dimensions of the cavity and the shaft are correct, especially the inner chamfer, there should be no slope, the end face of the shaft and the cavity should be smooth and clean, and the chamfer should be free of damage and burrs. In the assembly part, there should be no burrs, sand, iron filings and other debris in the part where the shaft is installed (chamfering), which will cause irregular damage to the lip of the oil seal. It is recommended to use an r-angle for the chamfering part. 5. In terms of operation skills, you can feel it with your hands to see if it is smooth and round. 6. Do not tear the wrapping paper too early before installing the skeleton oil seal to prevent debris from adhering to the surface of the oil seal and bringing it into work. Skeleton oil seal 7. Before installation, the skeleton oil seal should be smeared with lithium ester added with molybdenum disulfide in an appropriate amount between the lips to prevent dry grinding of the lips when the shaft starts instantaneously and affect the interference of the lips. , and should be assembled as soon as possible. If the oil seal seat where the oil seal is installed is not installed immediately, it is recommended to cover it with a cloth to prevent foreign matter from adhering to the oil seal. Hands or tools coated with lithium grease must be clean. 8. The skeleton oil seal should be flat installed, and there should be no tilting phenomenon. It is recommended to use hydraulic equipment or socket tools for installation. The pressure should not be too high, the speed should be even and slow. 9. For the machine of the frame oil seal installed this time, mark it to facilitate tracking, and pay attention to the whole process.

- As a leading company in the field of oil seal manufacturing, Chengzhi Company has always been committed to providing customers with high-performance and high-reliability sealing solutions. Today, we grandly launch a new oil seal product with a size of 73.5*89*8.5 to further meet the market's diverse needs for high-quality seals. Product highlights: Accurate size, wide applicationThe new oil seal has an inner diameter of 73.5mm, an outer diameter of 89mm, and a thickness of 8.5mm. It is designed for medium and large mechanical equipment and is suitable for a variety of scenarios such as construction machinery, automobiles, agricultural equipment and industrial transmission systems. High-performance materials, durable and reliable Made of high-quality nitrile rubber (NBR) or fluororubber (FKM) materials, it has excellent oil resistance, high temperature resistance and wear resistance, ensuring stable operation under harsh working conditions. Innovative design, excellent sealing Combined with advanced single-lip or double-lip seal structure design, it effectively prevents lubricating oil leakage and external contaminants from invading, extends the service life of equipment, and reduces maintenance costs. Strict quality inspection, quality assuranceEach oil seal undergoes strict quality inspection to ensure that the dimensional accuracy and performance reach the industry-leading level, providing customers with a worry-free use experience. Market application: The new 73.5898.5 oil seal can be widely used in: Engineering machinery: excavators, loaders, etc.; Automotive industry: gearboxes, engines, etc.; Agricultural equipment: tractors, harvesters, etc.; Industrial equipment: pumps, reducers, etc. Customer value: Chengzhi Company has always been customer-oriented. The new oil seal not only improves the sealing performance, but also reduces the installation difficulty and maintenance cost through optimized design, creating greater value for customers. About Chengzhi Company: Chengzhi Company was established in 2013 and focuses on the research and development, production and sales of oil seals and seals. With advanced technology, strict quality management and perfect after-sales service, we have become a long-term partner of many well-known companies at home and abroad.

1. Basic functions of oil seals Oil seals are used to prevent lubricating oil leakage and external contaminants from entering, and are widely used in rotating shafts of mechanical equipment. 2. Dimensions Inner diameter (ID): 40mm, matching the shaft diameter. Outer diameter (OD): 46mm, matching the housing aperture. Thickness (Width): 17.5mm, determines the installation space. 3. Materials and types Material: commonly used nitrile rubber (NBR), fluororubber (FKM), etc., depending on the working environment. Type: single lip or double lip, single lip prevents oil leakage, double lip has dustproof function. 4. Installation and maintenance Installation: Make sure the shaft and housing are clean to avoid damage to the oil seal. Maintenance: Check regularly and replace worn oil seals in time.

The combined gasket is made of a rubber ring and a metal ring integrally bonded and vulcanized. It is a sealing ring used to seal the thread and flange connection. The ring includes a metal ring and a rubber gasket. Instructions for use It is suitable for the pressure system sealing of welding, ferrule, expansion pipe joint, screw plug and mechanical device in the pipeline system with oil as the medium, in order to prevent the leakage of oil, fuel, water and medicine. Because of its simple structure, high sealing efficiency and low price, it is widely used in machinery manufacturing. Technical data Working pressure: ≤40 Mpa Temperature: -25℃ ~ +100℃ Medium: hydraulic oil Material properties Material: rubber, metal

     O-ring is a common seal, and its cross-section is round, hence its name. It is made of elastic material, usually rubber or silicone, and has good elasticity and self-sealing properties. O-ring is suitable for many forms of sealing, including static and dynamic sealing.       In static sealing, O-rings are placed between two parallel planes, such as pipe joints or valve seats. When subjected to compressive loads, the O-rings deform and fit tightly against the sealing surface to form an effective seal. The elasticity and self-sealing properties of O-rings make them effective in static sealing.    In dynamic sealing, O-rings are usually installed on the surface of shafts or holes to prevent leakage of liquids or gases. During movement, O-rings are subjected to shear forces and will deform to a certain extent. But over time, the O-rings will gradually adapt to the surface of the shaft or hole to form an effective seal.     O-rings are suitable for a variety of industries and fields, including machinery, chemicals, oil and gas, etc. In these industries, O-rings are widely used in the sealing of various pipes, valves, hydraulic systems and other equipment.     In short, O-ring is a common seal, suitable for various forms of sealing. It has good elasticity and self-sealing properties, can effectively prevent the leakage of liquid and gas. It is widely used in various industries.

2024.11.5-8 Shanghai PTC Exhibition