How do HEPA filters detect leaks?

High efficiency air filter in the purification system has a good role, can efficiently filter dust impurities efficiency of up to 99.999%, based on the above characteristics and advantages, users more recognized high efficiency air filter, because the HEPA filter specifications can be customized, widely used in industrial workshops, shopping malls, subways, airports and so on.

What factors will affect the filtration effect of the HEPA air filter, and how to check whether the high efficiency air filter is qualified?

First,HEPA filter influence factors:

Dust particle size: the larger the inertia, the greater the interception effect, the smaller the particle size, the more obvious the diffusion effect. The intermediate particle size has low filtration efficiency, so the intermediate particle size is often used to check the efficiency of the high efficiency filter;

Filter wind speed: the greater the wind speed, the stronger the inertial effect, but the wind speed is too strong will blow out the attached dust particles, and the wind speed is too large to increase the filtration resistance. The smaller the wind speed, the stronger the diffusion effect and the smaller the filtration resistance; Fiber diameter and compactness: the finer and denser the fiber, the larger the contact area with the air, the stronger the inertia and interception effect, but the resistance increases;

Dust attachment: With filtration, the particles deposited on the surface of the fiber gradually increase, so it is necessary to regularly clean the filter medium.

Second, the high efficiency air filter specifications can be customized, what are the installation leak detection methods?

Visual inspection: First, check the appearance of the filter for obvious breakage or damage, such as cracks, holes, or damaged seals. These visible defects may cause gas leakage.

Pressure detection: The use of pressure detection equipment, by applying different pressures on both sides of the filter, to observe whether there is gas leaking out of the filter where it should not leak. This can be done with a manometer or a pressure difference gauge.

Smoke test: Release light smoke around the filter and observe if there is smoke passing through the filter to detect potential leaks.

Color dye test: Add a special color dye to the air side of the filter, and then check the exhaust side of the filter for dye seepage. This approach can help find tiny vulnerabilities.

Ultrasonic inspection: The filter is scanned using ultrasonic equipment to detect possible cracks or holes.

Pressure drop test: Measures the pressure drop of the filter at the same air volume. If the pressure drop is abnormally high, it may indicate that there is a leak in the filter.

Simulation test: Test the filter using simulated substances (similar to particles that filters normally filter) to see if there are any escapes.