Chemical protection performance tester

The chemical substance protection performance tester is a testing system for testing the acid and alkali permeability of protective clothing and other protective equipment. The system can output permeability data according to user settings and is mainly used to test the chemical permeability performance of protective clothing and other protective equipment; The principle of this product is to form a closed-loop circuit through a micro flow pump, a perspective type constant temperature water bath, and a water bath type measurement chamber. The sample is clamped between the measurement chamber and the capture chamber through a split flange, and tetrafluoroethylene gaskets are placed on both sides of the sample. A silicone ring and protective gasket are installed at the contact position between the split flange and the measurement cell. During operation, the chemical to be tested is added to the measurement chamber, and the chemical penetrates through the sample to the capture chamber and is captured by the capture solution, which circulates with the loop. During the process, users are allowed to adjust the circulating flow rate. In principle, the flow rate should not be too large or too small, approximately5The flow rate of the captured liquid is multiplied by the volume, and the analysis is calculated by analyzing the electrode;

reference standard

ASTM F739Standard Test Method for Resistance of Protective Clothing Materials to Liquid or Gas Penetration under Continuous Contact Conditions;EN 374Chemical resistant and microbiological protective gloves.第4 part:Determination of chemical permeability resistance;

EN16523Using chemicals to determine the permeability resistance of materials. 第1 part:Penetration of liquid chemicals under continuous contact conditions; ISO 6529protective clothing.Chemical protection.Determination of Liquid and Gas Penetration Resistance of Protective Clothing;

BS EN 14325-2018Chemical protective clothing.Test methods and performance classification for seam connection and assembly of chemical protective clothing materials

Application field

PTFETesting room（ASTM F739）Can be used together with glass testing rooms or stainless steel testing rooms to form a multifunctional chemical penetration testing system, applied in laboratories, universities,CPCManufacturer, third-party laboratory or measuring unit, stone

Oil industry, etc;

Experimental Procedure

The operator prepares the test solution for later use and holds the sample securely;

Put the measuring cell together into a water bath; Turn on the micro pump to add the capture liquid through the capture chamber until the loop is completed; Record the total volume of capture solution added; Adjust the flow rate to approximately5Double the volume of the capture liquid, it is not recommended to exceed500ml/min.

After stabilizing, click on the background and record the background value;

Add the chemical to be tested into the measurement room, and the instrument will automatically collect and analyze data at fixed intervals;

measurement parameters

Penetration time

permeability

Maximum permeability

Standard breakthrough time

The anti chemical liquid penetration performance tester for protective clothing is produced by Litai in Germany according to the standardEN 374-3Protective gloves resistant to chemical corrosion and microorganisms.第3Design and manufacture of partially chemical resistant permeability testing, while meeting the requirements ofEN ISO 6529(Protective clothing).Protection against chemical substances.Measurement of Liquid and Gas Penetration Resistance of Protective Clothing Materials and National StandardsGB/T 23463(Chemical penetration test method for protective clothing.).

The chemical liquid penetration resistance tester for protective clothing tests the resistance of chemical protective materials to liquid chemical penetration under continuous contact conditions, and is suitable for testing the penetration performance of impermeable chemical protective materials. The testing pool of the chemical liquid penetration resistance tester for protective clothing is controlled at a constant temperature to maintain the temperature. The chemical protective material sample in the testing pool continues to come into contact with the liquid chemical, and the capture medium in the capture chamber captures the penetrating chemical substances. Through quantitative analysis, the concentration of the penetrating chemical substances is measured, and the penetration time, standard penetration time, and permeability of the chemical substance penetrating the protective material are calculated to determine the penetration resistance level of the protective material. The main testing parts of the chemical liquid penetration resistance tester for protective clothing include:
Gas medium system
Test Pool
Temperature control system
Analysis System
The termination conditions for the chemical liquid penetration resistance tester of protective clothing are determined by the following conditions:1Achieve a stable infiltration state;2The penetration rate continues to increase;3, achievedzuiHigh penetration rate;4Operation scheduled time (testing time is generally8Hour). If the following conditions are met, the test will be terminated,1Achieve a stable infiltration state;2The penetration rate continues to increase;3, achievedzuiHigh penetration rate;4Operation scheduled time (testing time is generally8Hour).