Gester Instruments | Professional Textile Testing Equipment Manufacturers Since 1997
Protective clothing hydrostatic pressure tester test principle and test steps
The protective clothing hydrostatic pressure testing-equipment' target='_blank'>tester is used to measure the liquid permeability and blood permeability of medical protective clothing, outdoor sports clothing, umbrellas, waterproof fabrics, jackets and other protective materials. Applicable standards: GB/T 4744, AATCC 127, ERT 120-1 160-0, BS EN20811/3321/3424, AFNOR G07-057, ISO 811, JIS L1092A, JIS L1092.B-a, JIS L1092 B-b, ASTM F903C, ASTM F1670, ASTM F1671, EN 1734, ISO 1420, FZ/T 01004. Main parameters: 1. Test pressure: 0-5000mbar (5000cmW.G); 2. Pressure accuracy: resolution 0.1mbar; 3. Test area: 100cm2 (optional 10cm2, 19.63cm2, 26cm2, 28cm2); 4. Sample thickness : no more than 40mm; 5. Compressed air: 6-8bar (clean and dry air); 6. Alarm time: 0-9,999min (can be set according to pressure or time). Test principle: The sample is fixed on the test area of the standard area, and the air compressor adds 0-5bar air into a water tank filled with distilled water, and applies a certain pressure of water to the sample. Testing can be done either dynamically or statically. (1) Dynamic method: The hydrostatic pressure resistance performance of the sample is determined by testing the pressure when a fixed number of water droplets seep out from the side of the sample that is not in contact with water at a certain pressure increase rate. (2) Static method: The hydrostatic pressure resistance performance of the material is determined by testing the water seepage of the sample after maintaining the pressure for a certain period of time under a certain hydrostatic pressure. Test steps: 1. Cut the test fabric into 100mm×100mm size sample; 2. Put the sample into the fixture, tighten the fixture to fix it well; 3. Press the up button, the metal container containing 700ml of water starts to rise at a constant speed under the drive of the motor, and the sample in the fixture starts to rise at a constant speed. Increase the water pressure; 4. Measure the water penetration by observing the color change of the indicator paper covering the filter paper sample through the plastic window of the clamp; 5. When the initial signal of the indicator paper color change (from blue to pink) appears, Immediately read the water level height of the ruler, expressed in Pa (mmH20); 6. Press the up button again to stop the metal container from rising, and record the reading as the test data of the impermeability of the filter paper; 7. Open the fixture, take out the sample and the indicator paper, Dry the load window of the fixture with a soft cloth, and check the water level in the fixture; 8. If necessary, refill the water, place another sample and indicator paper on the fixture, and repeat the above test steps to test.
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The Heat Contact Machine GT-C101 is a specialized testing instrument designed for evaluating the heat resistance and thermal protective performance of gloves, protective clothing, and other heat-resistant materials used in high-temperature environments. In industries such as smelting, casting, welding, and glass manufacturing, workers are frequently exposed to intense heat, making accurate testing of contact heat resistance essential for ensuring safety and compliance.
GT-C101 simulates real working conditions by measuring heat transfer delay and thermal transmission under instant contact with high-temperature surfaces. Fully compliant with EN 407, EN 702, and ISO 12127-1 standards, this machine provides precise, repeatable data for manufacturers, laboratories, and research institutions. With high-temperature capability up to 500°C, advanced calorimetry, digital monitoring, and adjustable contact speed, the Heat Contact Machine GT-C101 is an indispensable tool for developing and certifying next-generation PPE and heat-insulation materials.
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