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发表于 2012-5-24 12:42
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来自: 中国上海
本帖最后由 1-1-1 于 2012-5-24 12:44 编辑
The test is made by spraying the machine from all practicable directions with a stream of water
from a standard test nozzle as shown in figure 6. The conditions to be observed are as follows:
– nozzle internal diameter: 12,5 mm;
– delivery rate: 95 – 105 I/min
– water pressure at the nozzle: approximately 100 kPa (1 bar) (see NOTE 1);
– test duration per m2 of surface area of the machine: 1 min;
– minimum test duration: 3 min;
– distance from nozzle to machine surface: approximately 3 m (see NOTE 2).
NOTE 1 The measurement of the water pressure may be replaced by that of the height to which the spray of the nozzle freely rises:
Pressure: 30 kPa (0,3 bar) Height: 2,5 m
Pressure: 100 kPa (1 bar) Height: 8 m
NOTE 2 The distance of the nozzle to the machine under test, for degrees 5 and 6, was set at 3 m for practical
reasons; it may be reduced in order to test the machine from every direction. |
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