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The mask gas exchange differential pressure tester uses the suction type air source as the power source of the instrument, which is not limited by the space of the test site. It is equipped with a high-precision differential pressure sensor, which digitally displays the differential pressure on both sides of the sample, and the special sample clamp ensures firmness. The clamp sample is suitable for determining the gas exchange pressure difference of medical masks, and can also be used to measure the gas exchange pressure difference of other textile materials. It is a test equipment independently developed and produced by our company Shanghai QINSUN Precision Electromechanical Technology Co., Ltd., with high cost performance and complete after-sales service.
Measurement principle:
Use constant air flow measurement Devices that measure the pressure difference required to draw in airmeasure through the surface to measure air exchange pressure for medical mask materials Water-filled differential pressure gauges are used to measure differential pressure Mass flow meters are used to measure air flow Electric vacuum pumps Air is drawn through the test equipment and a needle valve is used to control air flow arrange for.
Preparation for use:
1. Connect the compressed air line on the host to the compressed air line or the connection of a small air compressor configured separately, open the air pump valve and connect the air pump power supply;
2. Put the mask on the aluminum fixture Fixed end;
3. Pull the valve by hand to push the sliding armature on the other side to the fixed position and tighten the mask;
4. The outside of the mask is directed towards the sliding end piece.
Determination of the compositionof the sample holder:
1. The sample holder must consist of a mechanical clamping system and alignment of top and supports.
2. The sample container must include a mechanism to adjust the clamping pressure. A threaded system can be used on the bottom or top of the sample container.
3. The inner diameter of the upper support and the lower support in the contact area with the filter material should be mm.
4. The sealing of the top and bottom brackets to the filter material should be metal-to-metal contacts.
