ITEM 51B

The WATER COLUMN determines the fabric resistance to water penetration to hydrostatic pressure.
Through a constant increment of the hydrostatic pressure, selectable between 0 and 600  cm/min, it determines the moment where it is possible to visibly see the passage of water  in three points of the surface of the testes sample: in this moment it is possible to read the  measure of the height of the water column (mm H2O) necessary to provoke the  permeability of the fabric, according to the normative.

INTERNATIONAL STANDARDS: EN UNI ISO 20811 Determination of resistance to water penetration – Hydrostatic pressure test, UNI 4818, ISO 811, DIN 53886, EN 5123 Determination of resistance to water penetration – Constant pressure test, AFNOR G-07 057, EN ISO 811 Determination of resistance to water penetration – Hydrostatic pressure test, BS 32823, EN 3321 a EN 3424, AATCC 127, EN 13859, etc.

The sample to be examined is fixed through the suitable sealed system in a test area with a surface of 100 cm2.
Equipped with an HMI – Touch screen panel for the maintenance and the monitoring of  the tests, the configuration of the test parameters and the confirmation from the operator  when the impermeability to water on the sample is reached.
The saved results are filed with a backup inside the ROM memory (recoverable also in case  of the stopping of the tool) for a maximum of 50 available tests.

Two methods of control are applicable to determinate the resistance to water penetration:

a)LIMIT HYDROSTATIC PRESSURE TEST the behavior of the fabric is determined, subject to a gradually increasing hydrostatic pressure, understanding to  what value of limit pressure the passage of water through the specimen takes place.
The used tool is the previously described one: during the test, the level of water must grow of 1 cm of water column.  It is possible to observe the fabric until the comparison of 3 water drops on the external surface.
It is possible to note the pressure value indicated on the scale and this will be the permeability value of the fabric.

b)CONSTANT HYDROSTATIC PRESSURE TEST where the test proof is to verify the behavior of the tested specimen, for 24 hours, which undergoes a determined  pressure which remains constant for all the testing time. After this period the obtained results to the inferior part of  the specimen are verified and a relative judgment is expressed.

The inferior part of the fabric during the test:
-is dry;
-has produced overflowing or dripping, which interrupted before the end of the test;
-had produced overflowing or dripping, which didn’t interrupt before the end of the test;
This test determines the level of effectiveness of the proceeding of permeability applied on the fabric.

Available Models: 1mt, 10mt or 20mt

Power Supply (Voltage): 110 o 230 Volt 50/60Hz  Dimensions: 1700 (h) X 540 (w) X 540 (d) mm  Weight: 70 Kg