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Commissioning Of Saudi Clean Room Project Completed Successfully

Commissioning Of Saudi Clean Room Project Completed Successfully

2022-03-09


In the last week our clean room project in Saudi Arabia had just finished,and this article mainly introduce how to check before acceptance,

Most of important part is to check if the sealing work is good an below are the leakage test method

1. Preparation before test: remove the branch pipe connecting the air outlet and seal the opening.

2. Test method

The test fan is used to blow into the air duct to raise the static pressure in the air duct to 700pa and maintain it. At this time, the air inlet volume is equal to the air leakage. The inlet air volume is measured by the orifice plate and differential pressure gauge set between the fan and the air duct. The static pressure in the air duct is measured by another differential pressure gauge (see attached figures 3.2 and 3.3).

3. Test device: see attached figure 3.2 (the device in Appendix IV can also be used). Test Fan: maximum rated air volume 1600m3 / h and maximum rated air pressure 2400pa. Connecting pipe: 100mm orifice plate (2):

When the air leakage Q ≥ 130m / h, the diameter is 0.0707m and the orifice constant C is 0.697;

When the air leakage Q < 130m3 / h, the diameter is 0.0316m and the orifice constant C is 0.603;

Differential pressure gauge: measure the differential pressure of orifice plate 0 ~ 2000Pa;

The static pressure of the air duct is 0 ~ 2000Pa.

4. Test steps

This test is mainly conducted for metal air duct. Detailed records shall be made for the whole test process, including air leakage position, air leakage volume, causes of air leakage and other conditions.

(1) Air leakage sound test

This test is conducted before air leakage measurement. Remove the branch pipe, seal the opening with blind plate and adhesive tape, and connect the hose of the test device to the tested air pipe. Close the air inlet baffle and start the fan. Gradually open the air inlet baffle until the static pressure in the air duct rises and remains at 700pa. Pay attention to the sound of air leakage at all joints and holes of the air duct, mark each air leakage point and repair it.

(2) Air leakage measurement test

This test is carried out after the air leakage sound point is sealed. Start the fan, gradually open the air inlet baffle until the static pressure in the air duct rises and remains at 700pa, read the pressure difference on both sides of the orifice plate, and calculate the air leakage volume and air leakage rate according to the formula (Appendix 3.1 ~ appendix 3.3).

Suzhou Pharma Machinery Co.,Ltd.

2022/02/24

David




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