The expanded metal mesh is made of high-quality carbon steel plate stretched by a steel mesh punching and shearing machine, and the surface treatment adopts a galvanizing process. It is an important component of filters for inner supporting and outer protection.
HEPA filter support mesh has two main major functions: support & protection
- Support
GI diamond mesh can be used in combination with other materials, such as non-woven filter cloth, to create composite separators in HEPA filters. The expanded metal provides structural support and stability and helps create a more uniform spacing between pleats. It can also enhance the overall performance of the filter by providing additional filtration surfaces. 
- Protection
In most cases, the support mesh is used as an external screen or protective layer for the filter. It provides a rigid and durable structure that helps protect the delicate filter media from physical impact and damage. They are placed on the outer side of the filter to protect the filter media and maintain its integrity. By using the support mesh as an external screen, HEPA filters can withstand handling, transportation, and operational stresses while maintaining their effectiveness in capturing particles. In addition, it can act as a protective barrier, preventing larger debris or contaminants from reaching and potentially damaging the filter media. 
