Mask particle filtration efficiency Tester EN version

1.1 Instrument Introduction

Can simulate the actual use environment of melt-blown filter material or filter material, based on the standard requirements of the oil spray and salt spray method

Filtration efficiency and filtration resistance test.

The test parameters meet the requirements of the test methods in NIOSH 42 CFR Part 84 and GB / T 2626 standards.

In addition, the automatic filter material tester can also carry out the filter material permeability test, the test aperture: 1 / 1,1 / 2,1 / 4,1 / 8;

Test materials: layered melt-blown filter material or filter filter material;

Test method: oil spray test and salt spray test;

Test parameters: filter efficiency, filter resistance, etc.;

Automatic filter material tester can accurately evaluate the filter performance of melt-blown filter material or filter material, provide data basis for the research and development of new filter material, product quality control, material performance verification, and is the best choice for product performance verification in the fields of scientific research, testing, industrial production and other fields.

1.2 Test standard

Technical requirements of NIOSH 42 CFR Part 84 respiratory protection device;

GB / T 2626 —— self-priming filter antiparticulate respirator

1.3 Related Terms

Filtering efficiency: the percentage of particles filtered by the filter elements under the specified detection conditions;

Oil mist detection: DEHS / PAO / DSP and other oil or equivalents as aerosols to detect the filtration performance of melt-blown filter material or filter material;

Salt spray method detection: NaCl or equivalent halide as an aerosol to detect the filtration performance of melt-blown filter material or filter material;

1.4 Test principle

1.4.1 Oil fog method:

Dry oil-free compressed air enters the aerosol generator at a certain flow rate, producing a certain particle-distributed aerosol, through the cascade

Impactor sieve, will meet the standard requirements of the particle size distribution of particles discharged from the aerosol outlet, into the test pipeline.

And reach the filter material, filter material installed on both sides of the differential pressure sensor, the test process of the filter material upstream and downstream particles

Number monitoring; the whole test process is conducted with a certain flow or air volume.

technical parameter

1. Applicable filter material: ⑴ glass fiber filter material ⑵ PP filter material ⑶ coated filter material, etc

2. Detection particle size range: 0.3,0.5,1.0,2.0,5.0,10.0 m (sixth gear)

3. Flow rate range: 0~150 l / min

4. Detection resistance range: 0~1000 Pa

5. Dust source:

Medium mass diameter of ⑴ aerosol (DEHS): 0.18um; medium mass diameter: 0.3um; geometric deviation: less than 1.8;

⑵ sodium salt (2%NaCl solution) medium quantity diameter: 0.075um; medium mass diameter: 0.26um; geometric deviation: less than 1.6;

6. Standard test area: 100 cm 2

7. Power supply: 220V / 50 H z

8. System power consumption:<1500W

9. Overall dimensions: 850mm ╳ 770mm ╳ 1624mm

Instrument construction

Instrument structure includes:

Spray pump, electrostatic neutralizing device, cylinder, flowmeter, PLC industrial control system, fan, exhaust gas filter, flow transmitter,

Differpressure sensor, touch screen computer, oil fog aerosol generator, salt fog aerosol generator, etc.;

The instrument consists of the following parts:

Salt spray aerosol occurrence system: can produce salt aerosols that meet the standard particle size distribution requirements;

Oil mist aerosol occurrence system: can produce oil aerosols that meet the standard particle size distribution;

Salt spray aerosol heating system: the production of salt particles;

Electrostatic distance system: for neutralization of static electricity in salt mist aerosol;

Mixed chamber: mix the heated gas and salt mist aerosols to produce the conforming salt particles;

Aerosol switching system: convenient to switch the aerosol;

Filter material fixture: used for holding the filter material or melt-blown filter material;

Differential pressure sensor: used for measuring the upstream and downstream pressure difference of the filter material;

Particle counter: used for measuring the number of upstream and downstream particles of the filter material;

Flow controller: control and adjust to measure the air volume; other, etc.;

Preparation and installation

1. The system equipment should be placed in a cleaner environment, far away from the flowing gas sources and dust sources;

2. Clean the equipment before use;

3. Before use, please check whether the various hose and electrical connections of the test table are well connected to avoid transportation bumps

Become loose;

4. Prepare the filter material to be tested;

5. Accurately connect the input cable on the side of the test table with the external power supply (AC220V);