Welding smoke and dust collector test detection

Welding smoke and dust collector test length detection welding smoke and dust collector current detection surface part of air duct is defined as the test section & throughout; Symmetry, the test must be straight, section, there is no any obstacles will change the airflow. The length of the test section must not be less than 2 times the diameter of the duct. Welding smoke and dust collector inlet side of the fan if the test is located in the inlet side of the fan, then the downstream end of the distance to the inlet should be less than or equal to 0. 75D( Pipe diameter) 。 If the fan is equipped with one or several import valve, the test section of the downstream end of the distance to the fan inlet valve should be at least equal to the duct diameter 0. 75D( Pipe diameter) 。 Welding smoke and dust collector test section can be located in the units of the draught fan inlet valve side, as long as you comply with the regulations of the length of the test. If it is with two inlet valve of the double inlet fan, so should be allowed to have a test on each inlet valve, as long as each test period of conform to the requirement of the length of the test. For the double inlet fan, if the test section is located in the upstream of each inlet valve, so must detect each test section of the flow and pressure. Fan inlet total flow should be the sum of each imported box place measured flow. The export side of the welding smoke and dust collector fan if the test is in the export side of the fan, then the downstream end to fan outlet side away from the high should be at least equal to three times the diameter of the duct. To this end, fan fan export export should be the export of divergent tube side. Welding smoke and dust collector test flow within the period of the position of the segment traffic detection surface to the end of the period of the downstream distance should be at least equal to the duct diameter 0. 75D。 Traffic detection surface in the test section to the end of the test section of the upstream distance should be at least equal to that of the 1 duct diameter. 25 d.

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