Brand- og blyskabe GB NY - Flipbook - Side 16
PRESSURE DIFFERENCE
For cleanrooms there is typically a pressure difference
between rooms. This requires the pass-through cabinets
and the sluice cabinets to be sealed to ensure the pressure is always maintained to both connecting rooms.
The fire cabinets from Zystm can be supplied with an
additional sealing ensuring an airtight seal. The level of
protection achieved is detailed in the below test schedule. The numbers are advisory.
S MOK E CON T RO L T EST 3+4 ( SM) :
Summary of test results:
Face exposed to pressure
Temperature
Specimen leakage rate Qspec in m3/h at pressure:
10 pa
25 pa
Linear leakage rate QI in m3/h/m at pressure
50 pa
10 pa
25 pa
Side A
Ambient
2.0
3.7
5.7
0.3
0.5
Side B
Ambient
1.6
4.2
16.5
0.2
0.6
Side A
Medium
13.2
15.4
17.8
2.0
2.3
Side B
Medium
13.1
18.2
23.4
2.0
2.7
The leakage rate through the test specimen did not exceed 3 or -3 m3/h per metre length of the gap between
the fixed and movable parts of the doorset (e.g. between the door leafs and the door frame). The specimen
was tested from both sides for pressure levels up to 25 Pa as well as the leakage rate through the test specimen did not exceed 30 m3/h for pressure levels up to 50 Pa.
Smoke control testing according to EN 1634-3 for the construction described in this test report showed that
failure according to the performance criteria stated in the test method did not occur during the test.
If there is a pressure difference of more than 5 pa the
interlock solution from Zystm with hold function should
be selected, as the interlock must be activated to open
Illustration of sealing strip in frame.
16 |
the doors. Without the interlock solution the doors
may pop open due to the pressure difference between
rooms.
