How to choose the sealing gasket for the vacuum loop flange?

　　The selection of sealing gasket for vacuum loop flange is a crucial step, which directly affects the vacuum degree, sealing performance, and overall stability of the system operation. The following are the main factors to consider when choosing a sealing gasket:

Material considerations:

Rubber materials: such as natural rubber, nitrile rubber, fluororubber, etc., have good elasticity and sealing performance. Natural rubber is suitable for media such as water and seawater; Nitrile rubber is suitable for petroleum, lubricating oil, etc; Fluorine rubber is particularly suitable for vacuum environments and has excellent vacuum resistance performance.

Metal materials: such as stainless steel, copper, etc., suitable for high temperature, high pressure, or corrosive environments. Metal sealing gaskets have high strength and good corrosion resistance.

Graphite material: Flexible graphite composite gaskets have good resistance to high temperature, low temperature, and corrosion, and can be used under high pressure conditions.

Working pressure and temperature:

Select a sealing gasket material that can withstand the corresponding pressure and temperature based on the working pressure and temperature range of the system. For example, rubber materials may lose elasticity at higher temperatures, while metal materials can withstand higher temperatures.

Media compatibility:

Consider the chemical compatibility between the sealing gasket and the medium in contact. Some materials may experience swelling, softening, or corrosion in specific media, leading to seal failure. Therefore, it is necessary to choose materials that have good stability to the medium.

Sealing requirements:

Select a sealing gasket with appropriate sealing performance according to the vacuum degree requirements of the system. For high vacuum systems, it is necessary to choose sealing gasket materials with excellent sealing performance, such as fluororubber or metal sealing gaskets.

Cost considerations:

On the premise of meeting performance requirements, the cost of sealing gaskets also needs to be considered. The price of sealing gaskets made of different materials varies greatly, and needs to be balanced based on actual situations.

In summary, when selecting the sealing gasket for the vacuum loop flange, it is necessary to comprehensively consider factors such as material, working pressure and temperature, medium compatibility, sealing requirements, and cost. It is recommended to consult professional seal suppliers or engineers based on specific system requirements and conditions to obtain more accurate advice.