Melt blown cloth particle filtration efficiency (PFE) tester

I. Overview

JW-L8013is our company嘴xinR&DKZMelt blown cloth particle filtration efficiency (PFE) testerSuitable for testing the efficiency of filter media at levels 0.1% -99.99%, and testing filter media according to standards. The design structure of the test bench is compact and lightweight, and during the operation and testing process, only suitable power and compressed air (without water or oil) need to be provided, making it suitable for use in laboratories, factories, and other occasions.KZMelt blown cloth particle filtration efficiency (PFE) testerCan simulateKZOr the actual usage environment of the filter material, based on the standard requirements of oil mist and salt mist methods for filtration efficiency and filtration resistance testing.

The test parameters comply with the testing method requirements of NIOSH 42 CFR Part 84 and GB/T 2626 standards.

In addition, the automatic filter material tester can also perform permeability tests on filter materials, with test aperture sizes of 1/1,1/2,1/4,1/8;

Test Material: LayeredKZOr filter material;

Testing methods: oil mist test and salt mist test;

Test parameters: filtration efficiency, filtration resistance, etc;

The automatic filter material tester can accurately evaluateKZThe filtration performance of filter media provides data basis for the research and development of new filter materials, product quality control, material performance verification, etc. It is a product performance verification in scientific research, testing, industrial production and other fieldsmouthBest choice.

Reference standard

GB 2626-2006 Respiratory protective equipment - Self priming filter particle respirator

GB/T 32610-2016 Daily Protection TypeKZtechnical specifications

GB 19083-2010 Medical ProtectionKZTechnical Requirements

GB 19082-2009 Medical DisposablefanghufuTechnical Requirements

YY 0969-2013 Disposable Medical UseKZ

YY 0469-2011 Medical SurgeryKZ

ISO-29463 High efficiency filters and filter media for removing particles from the air

related terms

Filtering efficiency: the percentage of particulate matter filtered out by the filtering element under specified detection conditions;

Oil mist detection: using oil-based or equivalent substances such as DEHP/PAO/DSP as aerosols for detectionKZOr the filtration performance of the filter material;

Salt spray detection: using NaCl or equivalent halides as aerosols for detectionKZMethods for evaluating the filtration performance of filter media;

Test Principle

Oil mist method:

Dry oil-free compressed air enters the aerosol generator at a certain flow rate, generating aerosols with a certain particle distribution. After screening by a cascade impactor, particles with the required particle size distribution are discharged from the aerosol outlet and enter the testing pipeline.

And it reaches the filter material, with pressure difference sensors installed on both sides of the filter material. During the testing process, the number of particles upstream and downstream of the filter material is monitored; The entire testing process is conducted at a certain flow rate or air volume.

Salt spray method:

Dry oil-free compressed air enters the aerosol generator at a certain flow rate, generating aerosols with a certain particle distribution. After screening by a cascade impactor, particles with the required particle size distribution are discharged from the aerosol outlet and enter the testing pipeline.

Due to the static electricity generated by salt spray aerosols, it is necessary to neutralize the salt spray aerosols. And for salt aerosol, it needs to be heated to produce salt particles. The method is to mix aerosols that meet the particle size requirements with heated gas, and then evaporate the water in the aerosols to produce salt particles.

And it reaches the filter material, with pressure difference sensors installed on both sides of the filter material. During the testing process, the number of particles upstream and downstream of the filter material is monitored; The entire testing process is conducted at a certain flow rate or air volume.

2、 Main features

1. Automatically calculate filtration efficiency testing and airflow resistance.

2. Efficiency testing is conducted using two high-precision online counters to measure the aerosol concentration in the upstream and downstream of the sample, ensuring the authenticity and accuracy of the measurements taken.

3. The misting system developed by HCT Group in South Korea features fine atomization without moisture, stable concentration, and stainless steel material that is corrosion-resistant and durable.

4.10 incheslarge screenColor touch screen control, simple and intuitive operation, supports remote maintenance, automatic calculation and display of test results system, printing and output, etc.

5. Imported exhaust fan with automatic flow adjustment.

Melt blown cloth particle filtration efficiency (PFE) tester

2、 Main components

1. Aerosol generator

Used for occurrenceNaCl or DEHSStandard particles emit main particles with a particle size range of ≥ 0.3um, accounting for over 70% of the total, and can continuously and stably produce aerosols. Provide test particles upstream of the filter material.

2. Particle counter

Used to monitor the upstream and downstream particle concentration of the tested filter material, and obtain the efficiency of the tested filter material.

3. Differential pressure sensor

Used to test the pressure difference (or resistance) of the tested filter material at a certain test flow rate.

4. Aluminum alloy fixtures

Used for compacting and sealing the tested filter material.

5. Imported fan

Used to provide experimental flow rate for filter media, with automatic flow control.

6. Electrostatic neutralization device

Remove the charge from NaCl particles to make particle counting measurements more accurate.

Melt blown cloth particle filtration efficiency (PFE) tester