Principle and Precautions of Fabric Hydrostatic Pressure Tester

The fabric hydrostatic pressure tester test device is made of stainless steel materials. It provides a test platform placed horizontally. There is a 100 cm2 test tank on the platform. There is a rubber O-ring on the outer circle of the test tank. The pressure sensor is installed on the In-hole test, qisnun Precision Electromechanical Technology Co., Ltd. is a manufacturer, and customers in need are welcome to inquire in time. There is also a leveling bubble on the platform, which can control the flatness of the platform by rotating the feet. Above the platform is a fixing frame, which can make the triangular cloth pressing cover coincide with the test groove, and the inner diameter of the triangular pressing cloth cover is 100cm2. The triangular fabric pressing cover is driven by the rotating handle.e and can move up and down to place and clamp the tissue sample to be tested. Under the platform is the hydrostatic pressure supply part, which is composed of a water tank.ge tank, an electromagnetic pump, a conduit, a water level inspection, a pressure relief valve. water and a calibration interface.

Main parameters:

1. Test pressure: 0-5000mbar;

2. Pressure Accuracy: ±1mbar;

3. Resolution: 0.1 mbar;

4. Ascent rate: 1-300 mbar/min;

5. Test area: 100 cm2 (optional 10cm2, 19.63cm2, 26cm2, 28cm2);

6. Sample thickness: no more than 5mm;

7. Compressed air requirement: 6-8bar (clean and dry air).

Principle of the test:

Apply increasing (dynamic test) or constant (static test) water pressure ) until water seeps in from three different places in the specmen. After testing at least 3 samples, measure and calculate the average maximum water pressure of the fabric (the measurement unit is mBar or cmH2O), and this value is the water repellency of the sample.

The specific method is that the sample is fixed on the test area of ​​the standard area, the air compressor adds 0 to 5 bar of air into a water tank filled with distilled water , and the water with a certain pressure acts on the sample. It can be tested by two methods: dynamic or static:

(1) Dynamic method: by testing the pressure when a fixed number of water droplets ooze from the side of the sample that is not not in contact with water. at a certain rate of pressure increase, determine the hydrostatic pressure resistance of the sample.

(2) Static method: The hydrostatic pressure resistance of the material is determined by testing the water infiltration of the sample after holding the pressure pend for a certain period of time under a certain hydrostatic pressure.

Points to note:

1. Place the sample horizontally without bulging it;

2. The area above or below the fabric subject to continuous increasing water pressure is 100 cm2;

3. During the test, the clamping device must not leak water;

4. The sample will not slip in the clamping device;

5. Minimize the sample in the water penetration potential at the edge of the clamping device.

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