Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of civilian and military air purification equipment filter seals in China, also supports customized service. Please feel free to buy high quality civilian and military air purification equipment filter seals for sale here from our factory.
Civilian and military air purification equipment filter seals
In civilian and military air purification equipment, the filter seal ring is a common rubber seal used to ensure the sealing between the filter and the equipment during installation.
The filter seal is usually located on the edge or bottom of the filter and is used to fill the gap between the filter and the device and create a sealing barrier.
- Sealing: The filter sealing ring can fill the gap between the filter and the equipment, preventing unfiltered air from bypassing the filter and entering the equipment or escaping. This ensures that the air is effectively purified after passing through the filter, improving the effect and performance of air purification.
- Prevents leaks: The filter seal prevents air from leaking during the filter installation process. It forms a sealed contact surface between the filter and the device, preventing air from leaking into the surrounding environment through the gap and ensuring the normal operation of the air purification system.
- Prevent air flow around the filter: Proper installation of the filter seal can effectively prevent air from flowing around the filter. It ensures that the air flows through the predetermined path of the filter to avoid bypassing the filter or forming air leakage, and improves filtration efficiency.
Filter seals are typically made from durable rubber materials such as silicone or nitrile butadiene rubber (NBR). These materials have good sealing properties, chemical resistance and durability, and can provide reliable sealing in different working environments and conditions.
When selecting the material for the filter sealing ring of civilian and military air purification equipment, the following factors usually need to be considered

- Sealing and durability: The filter seal needs to have good sealing, which can effectively fill the gap between the filter and the equipment and prevent air from leaking or flowing around. At the same time, it should also be durable and be able to withstand long-term use and environmental stress without failure.
- Chemical resistance: Filter seals should be resistant to chemicals, cleaners or disinfectants that may be present in air purification equipment. This ensures that the seal will not corrode, deform or fail due to exposure to these substances.
- Temperature tolerance: Considering that air purification equipment may work under different temperature conditions, the filter sealing ring should have sufficient temperature tolerance to maintain its elasticity and sealing properties in high or low temperature environments.
- Environmental protection: Give priority to materials that meet environmental protection standards and avoid using materials containing harmful substances. This helps ensure that air purification equipment does not release harmful substances during use, safeguarding indoor air quality and user health.
Common filter seal materials include:
- Nitrile Butadiene Rubber (NBR): Nitrile Butadiene Rubber has excellent sealing, oil resistance and abrasion resistance and is suitable for general industrial applications.
- Fluorocarbon rubber (FKM): Fluorocarbon rubber has excellent chemical resistance and high temperature resistance and is suitable for applications requiring high chemical stability and temperature resistance.
- Silicone (VMQ): Silicone has a wide temperature range, good high temperature resistance and electrical insulation, and is suitable for sealing applications in high temperature environments.
- Chloroprene rubber (CR): Chloroprene rubber has good weather resistance and anti-aging properties, and has good resistance to oxygen, ozone and ultraviolet rays. It is suitable for outdoor environments and applications with ultraviolet radiation.
| Physical properties of VMQ REFERS | |||
| Property | Test standard | Value | Unit |
| Hardness | ISO48 | 60+/-5 | IRHD |
| Elongation at break | ISO37 | 250 | % |
| Tensile strength | ISO37 | 6.5 | Mpa |
| Compression set-24 hours at 175℃ Slab | ISO815 | 20 | % |
| Low termperature resistance TR10 | ISO 2921 | -40 | ℃ |
| Ageing properties | |||
| Property | Test standard | ||
| Hardness change | ISO 188 | 5 | IRHD |
| Elongation at break change | -28 | % | |
| Tensile strength change | -16 | % | |
| Weight change | -2.35 | % | |
Final material selection should be determined based on specific application needs, equipment manufacturer recommendations and requirements. When selecting filter sealing ring materials, it is recommended to communicate with the equipment manufacturer or Lindepolymer to obtain professional advice and ensure optimal sealing performance and durability.
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