Protective clothing chemical liquid permeability tester

Chemical substance protection performance tester is a test system to test the acid and alkali permeability of protective clothing and other protective equipment, The system can be set up according to the user itself, Output the permeability data, Mainly used for testing the chemical permeability of protective clothing and other protective equipment; The principle of this product is to form a closed loop through a micro flow pump, perspective type constant temperature water bath box and water bath type measurement chamber, Samples were clamped in between the measurement chamber and the capture chamber via a split flange, Teflon gaskets were placed on either sides of the sample, Install silica gel holding ring and protective gasket in contact with split flange and measuring tank, When operation by adding chemicals to be measured to the measuring chamber, Chemicals are captured by penetrating the sample into the trap chamber and circulating with the loop, During the process, users are allowed to fine-tune the circulation flow, in principle, The flow rate is not suitable too large, It's not just too small either, Approximately 5 times the flow rate of the trapped liquid product, Analysis and calculation by analyzing the electrodes;

I. Reference standard

ASTM F739 Standard test method for liquid or gas penetration of protective clothing materials under continuous contact; EN 374 protective gloves for chemical corrosion resistance and microorganisms.Part 4: Determination of the permeability of resistant chemicals;

EN16523 Dechemical permeability of material permeability. 1.Part 1: The penetration of liquid chemicals under continuous contact conditions; ISO 6529 protective clothing.Protection of chemicals.Determination of liquid resistance and gas permeability of protective clothing;

BS EN 14325-2018 Chemical protective clothing.Test method and performance classification of joint connection and assembly of chemical protective clothing materials

Ii. Application field

PTFE test room (ASTM F739) can be used with glass test room or stainless steel test room to form a multi-functional chemical penetration test system, used in laboratories, universities, CPC manufacturers, third party laboratory or unit of measurement, stone

Oil industry, etc.;

Third, the experiment process

The operator will prepare the solution to be tested for backup, and clamp the sample;

Put the measuring pool into the water bath together; open the micro-pump to add the trap liquid through the trap room until the loop is completed; add the trap liquid product together; adjust the flow rate to about 5 times the trap liquid product, not exceeding 500ml / min.

After stabilization, click background and record background value; add chemicals to the measuring room, and automatically collect and analyze instruments every fixed time; measurement parameters, penetration time, permeability and standard breakthrough time

Protective clothing resistance to chemical liquid permeability performance tester is the German standard EN 374-3 (chemical corrosion resistance and microbial protective gloves.Part 3 Determination of chemical resistance permeability) Design and manufacture while complying with EN ISO 6529 (protective clothing.Protection against the chemicals.Determination of the liquid protection and gas permeability of protective clothing materials) and the national standard GB / T 23463 (permeability test method of protective clothing chemicals.

Protective clothing resistance to chemical liquid permeability tester test under continuous contact conditions, chemical protective material resistance to liquid chemical permeability performance, suitable for airtight chemical protection material permeability test.Protective clothing resistant chemical liquid permeability tester test pool after constant temperature control, maintain temperature, the chemical protective materials in the test pool sample continuous contact with liquid chemicals, the trap medium capture through chemical substances, through quantitative analysis, measure the concentration of penetrated chemical substances, to measure the chemical penetration protection material through time, standard through time and permeability, so as to obtain the permeability grade of protective materials.The main test parts of the protective clothing resistant chemical liquid permeability tester include: gas media system, test tank, temperature control system and analysis system.
The termination conditions of chemical liquid permeability tester of protective clothing are determined by the following conditions: 1. Stable permeability state; 2. Continuous growth of permeability; 3. zui large permeability; 4. Operation scheduled time (test time is generally 8 hours).The test is terminated after meeting the following conditions; 1. achieve stable penetration state; 2. Increasing permeability; 3. reach zui large permeability; 4. Operation predetermined time (test time is generally 8 hours).