Moisture resistant microbial penetration tester

particle filtration efficiency tester

product information

& NBSP;

molten jet filter particle filter tester can simulate the actual use environment of molten jet filter material or filter material. Based on the oil mist and salt mist method required by the standard, the filtration efficiency and filtration resistance of

can be tested.

test parameters comply with the test method requirements in NIOSH 42 CFR Part 84 and GB/T 2626 standard.

in addition, the automatic filter material tester can also test the permeability of filter material, test aperture: 1/1,1/2,1/4,1/8;

test material: layered molten jet filter material or filter material;

test methods: oil mist test and salt spray test;

test parameters: filtering efficiency, filtering resistance, etc.

automatic filter material tester can accurately evaluate the filtration performance of melt jet filter material or filter material, providing data basis for the research and development of new filter material, product quality

control, material performance verification, etc., is the product performance verification in the field of scientific research, testing, industrial production

;   Choice.

test standard

NIOSH 42 CFR Part 84 technical requirements for respiratory protective devices; < / p > < p > GB/T 2626 respiratory protective equipment, self-priming filter type prevent particulate respirator < / p > < p > & have spent

filtration efficiency: the percentage of particulate matter removed by a filter element under specified detection conditions;

oil mist detection: oily or equivalent substances such as DEHS/PAO/DSP are used as aerosol to detect the filtration performance of melt jet filter material or filter material;

salt spray method: NaCl or halide equivalent as aerosol to detect the filtration performance of melt jet filter material or filter material; 1. Oil mist method:

dry oil-free compressed air enters the aerosol generator with a certain flow rate and produces aerosol with a certain particle distribution, which is screened by the collider

to discharge the particles meeting the standard particle size distribution from the aerosol outlet and enter the test pipeline.

and reach the filter material. Pressure difference sensors are installed on both sides of the filter material. During the test, the number of particles

in the upstream and downstream of the filter material is monitored. The whole test process is carried out at a certain flow rate or air volume. Salt spray method:

2. Salt spray method:

dry oil-free compressed air enters the aerosol generator with a certain flow rate to produce aerosol with a certain particle distribution. After the cascade

impinger screening, the particles meeting the standard particle size distribution will be discharged from the aerosol outlet and into the test pipeline.

due to salt fog sol produced with static electricity, it is necessary to neutralize salt fog sol. And for salt fog sol,

needs to be heated to produce salt particles. The method is as follows: the aerosol which meets the particle size requirement is mixed with the heating gas, and then the water in the aerosol is evaporated to produce salt particles.

and reach the filter material. Pressure difference sensors are installed on both sides of the filter material. During the test, the number of particles

in the upstream and downstream of the filter material is monitored. The whole test process is carried out at a certain flow rate or air volume.

  Technical parameters of  1. Applicable filter material: (1) glass fiber filter material < / p > < p > 2 (3) effect of PP filter, filter material; Such as < / p > < p > 2. Detection size file don't: < / p > < p > 0.3, 0.5, 1.0, 2.0, 5.0, 10.0, including m (6) < / p > < p > 3. Flow range:

0 ~ 150 l/min

4. Detection resistance range:

0 ~ 1000 Pa

5. Dust source:

1 aerosol (DEHS)

quantity medium diameter: 0.18um;

mass medium diameter: 0.3um;

geometric deviation: less than 1.8;

2 sodium salt (2%NaCl solution)

quantity medium diameter: 0.075um;

mass medium diameter: 0.26um;

geometric deviation: less than 1.6; 6. Standard test area:

100 cm2

7. Power supply: < / p > < p > 220 v / 50 Hz < / p > < p > 8. System power consumption: < / p > < p > < 1500 w < / p > < p > 9. Instrument structure

includes:

spray pump, electrostatic neutralizer, cylinder, flow meter, PLC industrial control system, fan, tail gas filter, flow transmitter,0

1 differential pressure sensor, touch screen computer, oil fog aerosol generator, salt fog aerosol generator, etc.

instrument is composed of the following parts:

salt aerosol generation system: can produce salt aerosol meeting the requirements of standard particle size distribution;

oil fog sol generation system: can produce oil-gas sol in accordance with the standard particle size distribution;

salt fog sol heating system: producing salt particles;

electrostatic path system: used for neutralizing static electricity in salt fog sol;

mixing chamber: the heating gas and salt fog sol were mixed to produce the required salt particles;

aerosol switching system: easy to switch aerosols;

filter material jig: used for clamping filter material or molten jet filter material;

pressure differential sensor: used to measure the pressure differential upstream and downstream of the filter;

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

flow controller: control and adjust the measured air volume;

and others;

preparation and installation

1. The system equipment shall be placed in a relatively clean environment, away from flowing air source and dust source; 2. Clean the equipment before use; 3. Before use, please check whether all kinds of hoses and electrical connections on the test bench are well connected, so as to avoid looseness caused by transportation turbulence

; 4. Prepare the filter material to be tested; 5. Connect the input cable on the side of the test bench to the external power supply source (AC220V) correctly;