Water Intrusion Test | Water Flow Test - Sartorius Sartocheck 4 plus Operating Instructions Manual

7.8 Water Intrusion Test |
Water Flow Test
Fig. 7-22 | Test parameters: Water Intrusion Test
This test method is used exclusively to test hydrophobic gas filter elements.
The test sequence of this test method is the same as that of the Diffusion Test.
However, the Water Intrusion Test differs from the latter test in that the hydrophobic
filter element in the filter housing is flooded upstream with water to blind the filter
so that when a pressure gradient is applied, the water volume intruding into and
diffusing through the hydrophobic filter matrix per unit of time is calculated
from the pressure drop, instead of the gas stream diffusing through the membrane
as in the Diffusion Test.
1. The Water Intrusion Rate: Indicates the rate calculated from the pressure drop,
test time and upstream volume (analogous to the calculation of diffusion).
2. The Water Flow Rate: Indicates the rate related to the water flow in the
membrane (Water Intrusion converted to "Water Flow").
The Water Intrusion Test is suitable for all hydrophobic systems of approx. 1000 cm
filtration area and larger, all the way to process-scale systems.
(For a more detailed description, see Chapter 12, Appendix)
Test parameters: Water Intrusion Test
Test pressure: in mbar
Stabil. time 1: in min.
Stabil. time 2: in min.
Test time: in min.
Max. WIT: in ml/min
Auto filling: Yes | No
Net volume: Enter or measure, if Enter: Volume in ml
Remark:
Stab 1 is the stabilization time before Netvolume determination. This time is needed
to compact the filter system and therefore to avoid misinterpretation.
Stab 1 should not be less than 3 min.
Stab 2 is the stabilization time before the water-intrusion (water-flow) measurement.
The stab 2 value is available in the validation guide of the filter cartridges.
The standard value is 10 min.
2
Operation 37