Custom Non Metallic Gasket & Sheet Gasket

How to choose the most suitable non-metallic gasket material to ensure sealing performance, chemical resistance and temperature stability in different industrial applications?

In different industrial applications, choosing the most suitable non-metallic gasket material (such as rubber, plastic, fiber, etc.) to ensure sealing performance, chemical resistance and temperature stability is a complex but crucial process. Here are some key considerations and suggestions:

1. Consider the specific needs of industrial applications
Media type: First, clarify the type of media that the gasket needs to contact, including gas, liquid or solid, and the chemical properties of these media (such as acidity, alkalinity, corrosiveness, oxidizing, etc.). This will directly affect the selection of gasket materials.
Temperature and pressure range: Determine the temperature and pressure range of the environment in which the gasket is located. Different materials have different temperature and pressure resistance, and materials that can work stably within this range need to be selected.
Mechanical stress: Consider the mechanical stress to which the gasket is subjected, such as vibration, impact, etc. These factors may affect the sealing effect and life of the gasket.

2. Evaluate the performance of gasket materials
Sealing performance: Select materials with good sealing performance to ensure effective leakage prevention under various working conditions.
Chemical resistance: Evaluate the chemical resistance of the material according to the media type. For example, for strong acid and alkali environments, materials with excellent chemical corrosion resistance need to be selected.
Temperature stability: Ensure that the selected material can maintain stable physical and chemical properties within the expected temperature range.
Mechanical strength: Consider the mechanical properties of the material such as tensile strength and tear strength to ensure that the gasket is not easily damaged during use.
3. Choose the right gasket material
Based on the above considerations, the following are some common non-metallic gasket materials and their applicable scenarios:
Rubber gaskets:
Natural rubber (NR): Suitable for weak acids, weak bases, salts and chloride solutions, but poor corrosion resistance to oils and solvents.
Chloroprene (CR): Suitable for moderately corrosive acid, alkali and salt solutions, and also has good corrosion resistance to commercial oils and fuels.
Nitrile rubber (NBR): Has good resistance to oil, solvents, aromatic hydrocarbons and other properties over a wide temperature range.
Fluororubber (VITON): Has excellent heat resistance, oil resistance, and medium resistance, especially suitable for high temperature and strong corrosive environments.
Plastic gaskets:
Polytetrafluoroethylene (PTFE): has excellent chemical stability and wide temperature resistance range (-95℃~232℃), suitable for a variety of chemical media.
Expanded polytetrafluoroethylene (EPTFE): retains the advantages of PTFE, while being tougher, reducing creep and cold flow, and suitable for extreme working conditions.
Fiber gaskets:
NON ASBESTOS GASKET: Made of aramid, inorganic fiber or carbon fiber combined with rubber, it has a wide temperature range and good chemical properties.
Graphite gasket: has excellent corrosion resistance to many acids, alkalis, salts and organic compounds, but it should be used with caution in high temperature and strong oxidizing media.

When manufacturing sheet gaskets, how to ensure the consistency, flatness and precision of materials to meet strict sealing requirements?

When manufacturing sheet gaskets, in order to ensure the consistency, flatness and precision of materials to meet strict sealing requirements, control and optimization can be carried out from the following aspects:

1. Material selection and processing
Material selection:
Select materials with excellent physical and chemical properties, such as high temperature resistance, corrosion resistance, pressure resistance and other characteristics, to meet the sealing needs under different working conditions.
Ensure that the source of materials is reliable and the quality is stable, and avoid using materials with defects or unstable performance.
Material processing:
Strictly screen and test the raw materials to ensure that the key indicators such as thickness, hardness, tensile strength of the materials meet the requirements.
Perform necessary pretreatment on the materials, such as cleaning, degreasing, drying, etc., to improve the surface quality and processing performance of the materials.

2. Process control
Processing tools and equipment:
Select high-precision and stable processing equipment and tools, such as high-precision cutting machines, molds, etc.
Maintain and maintain the processing equipment and tools regularly to ensure that they are in the best working condition.
Processing method:
Select appropriate processing methods according to the specific requirements and material characteristics of the gasket, such as die cutting, pressing, cutting, etc.
Strictly control processing parameters such as cutting speed, pressure, temperature, etc. during processing to ensure the accuracy and flatness of the gasket.
Quality inspection:
Carry out quality inspection of multiple processes during processing, such as size inspection, flatness inspection, surface quality inspection, etc.
Use advanced testing equipment and instruments, such as laser measuring instruments, microscopes, etc., to accurately measure and analyze gaskets.

3. Process optimization
Optimize the process flow:
Develop a scientific and reasonable process flow to ensure that each production link meets quality requirements.
Continuously optimize and improve the process flow to improve production efficiency and product quality.
Strictly control the production environment:
Keep the production environment clean and stable to avoid pollutants such as dust and oil from causing adverse effects on the gasket.
Control parameters such as temperature and humidity in the production environment to ensure the processing performance and stability of the gasket.