1. Determine the standard used for gaskets

Generally speaking, the standards for gaskets are the same as those for flanges. Commonly used standards are: China National Standard (GB), Machinery Industry Standard (JB/T), Chemical Industry Standard (HG), International Standard (ISO), etc. The operator must understand the sealing performance of the gasket, nominal pressure, working temperature, applicable medium, etc., and also need to analyze and compare according to factors such as the type of sealing surface, the convenience of disassembly and assembly, and the cost performance. . Among them, operating conditions (medium, temperature and pressure) are the main basis for selecting gaskets.

2. Determine the nominal diameter and nominal pressure of the gasket

The nominal diameter and nominal pressure of the gasket are the same as the nominal diameter and nominal pressure of the flange. Such as: DN100-PN2.5; the operator must understand the sealing performance of the gasket, nominal pressure, working temperature, applicable medium, etc., and also need to analyze and analyze factors based on the type of sealing surface, the convenience of disassembly and assembly, and the sealing More cost-effective. Among them, operating conditions (medium, temperature and pressure) are the main basis for selecting gaskets.

3. Determine the type of gasket

The type of gasket used depends on the nominal pressure and the higher temperature of the medium. It is mainly divided into flexible graphite, polytetrafluoroethylene, rubber, non-asbestos fiber gasket and spiral wound gasket and corrugated live pressure gasket. Due to environmental protection and health reasons, asbestos gaskets such as oval gaskets and octagonal gaskets are gradually eliminated, so they are not recommended.

4. Determine the form and model of the gasket

The types of gaskets are mainly divided into four categories: non-metallic soft gaskets, spiral wound gaskets, metal composite gaskets and metal gaskets. The specific gasket form should be selected according to the flange form and with reference to the technical parameters provided by each manufacturer. The material of the gasket should be determined according to the temperature, pressure and corrosion performance of the medium, and then the type of gasket should be determined according to the above content. The type of gasket usually includes six parts: gasket form, material, nominal diameter, nominal pressure and standard number, manufacturer or brand.

The above is all the content introduced by the non-asbestos board manufacturers for you. To learn more about non-asbestos rubber sheets and non-asbestos gaskets, please come to consult!