香港2019年六开彩资料精选

欢迎进入慈溪市海升橡胶制品有限公司官网 Bookmark | Message | Sitemap | Contact Haisheng Welcome to the official website of Cixi Haisheng Rubber Products Co., Ltd.

National Consulting Hotline 400-0590-280

Popular keywords: rubber waterproof ring silicone o-ring rubber o-ring nitrile rubber lighter o-ring

o型橡胶密封圈
香港2019年六开彩资料精选 » Haisheng Official Website Information Center » Frequently Asked Questions » What factors should we consider when choosing O-rings?

What factors should we consider when choosing O-rings?

返回列表 Source: Cixi Haisheng Rubber Products Co., Ltd. Date 2018-10-18 15:27 Browse: -

The use of each O-ring is different. When selecting an O-ring, we must consider its working environment and conditions, seal requirements, and physical properties. For example, in life, we have to choose clothes that are suitable for ourselves. Which O-rings are suitable for machinery, which are suitable for the automotive industry, and which are suitable for electronic products. We must consider the various physical properties of O-rings, etc. In order to achieve the real needs of customers. So, when choosing O-rings, what specific factors should we consider:

1) Working medium and working conditions

When selecting the O-ring material, the compatibility with the working medium must be considered first. Secondly, comprehensive consideration should be given to the working conditions such as pressure, temperature, continuous working time, and operating cycle of the seal. If used in rotating applications, the temperature rise due to frictional heat must be considered. Different seal materials have different physical and chemical properties.

2) Sealed form

According to the type of load, it can be divided into static seal and dynamic seal; according to the purpose of sealing, it can be divided into hole seal, shaft seal and rotary shaft seal; according to its installation form, it can be divided into radial installation and axial installation. For radial installation, the deviation between the inner diameter of the O-ring and the diameter of the seal should be as small as possible for the shaft seal; for the seal for the hole, the inner diameter should be equal to or slightly smaller than the diameter of the groove. When installing axially, consider the direction of pressure. When the internal pressure is applied, the outer diameter of the O-ring should be approximately 1% ~ 2% larger than the outer diameter of the groove. When the external pressure is applied, the inner diameter of the O-ring should be approximately 1% ~ 3% smaller than the inner diameter of the groove.

3) Other factors affecting sealing performance

①0-ring hardness The hardness of the O-ring material is the most important index for evaluating the sealing performance. The hardness of the O-ring determines the compression amount of the O-ring and the maximum allowable extrusion gap of the groove.

② Extrusion gap The maximum allowable extrusion gap is related to the system pressure, the diameter of the O-ring section and the hardness of the material. Generally, the higher the working pressure, the smaller the maximum allowable extrusion gap value. If the clearance exceeds the allowable range, the 0-ring will be extruded or even damaged.

③ Compression permanent deformation Another index for evaluating the sealing performance of O-rings is compression permanent cross-section of the selected material. Under the action of pressure, the O-ring, which is an elastic element, undergoes elastic deformation, and permanent plastic deformation also occurs with increasing pressure. Generally, in order to prevent permanent plastic deformation, the maximum amount of compression allowed by a 0-ring is about 30% in a static seal and about 20% in a dynamic seal.

④ Pre-compression amount O-ring is installed in the groove. To ensure its sealing performance, an initial compression amount should be reserved. For different applications, the amount of pre-compression relative to the cross-sectional diameter W is also different. Generally, it is about 15% ~ 30% in static seal, and about 9% ~ 25% in dynamic seal.

⑤ Stretching and Compression When installing the O-ring in the groove, it must be stretched or compressed. If the values of tension and compression are too large, the cross section of the O-ring will be excessively increased or decreased, because 1% stretching will reduce the diameter of the section by about 0.5%. For hole seals, the 0-ring is best in a stretched state with a maximum allowable stretch of 6%; for shaft seals, the O-ring is best compressed along its perimeter and the maximum allowable compressive amount is 3 %.

We don't know how to choose the right O-ring, we can consider these factors such as working medium, working conditions, seal form, etc., so that we can avoid taking many detours. We Haisheng Rubber will customize O-rings according to the specific requirements of customers. We have professional engineers at Haisheng Rubber to provide professional answers to customers.


Recommended reading

[Label this article]:

[Responsible editor]: Cixi Haisheng Rubber Products Co., Ltd. All rights reserved: http://rmhym.com/

Latest News

海升橡胶带您了解氟橡胶密封圈的优势 1 Haisheng Rubber takes you to understand the advantages of fluoro rubber seals

海升橡胶带您了解全氟O型圈的安装注意事项 2Haisheng rubber takes you to understand the installation precautions of perfluoro O-rings

海升橡胶带您了解氟橡胶密封圈的功能和特性 3 Haisheng Rubber takes you to understand the functions and characteristics of fluoro rubber seals

海升橡胶带您了解密封圈发生泄漏的因素 4Haisheng rubber takes you to understand the causes of leaks in seals

海升橡胶带您了解垫片适应的环境 5 Haisheng rubber takes you to understand the environment that the gasket adapts to

海升橡胶带您了解橡胶制品发白的原因 6 Haisheng Rubber takes you to understand the cause of whitening of rubber products

海升橡胶带您认识密封圈具有的性能 7 Haisheng rubber takes you to know the performance of the sealing ring

海升橡胶带您了解怎样选择适合自己的O型圈 8 Haisheng rubber takes you to know how to choose the O-ring that suits you

海升橡胶带您了解氟硅橡胶O型圈的应用领域 9 Haisheng Rubber takes you to understand the application fields of fluorosilicone O-rings

海升橡胶带您了解橡胶防水密封圈 10 Haisheng rubber take you to know the rubber waterproof seal

National Service Hotline 400-0590-280