Ventilation Tube
Ventilation tubes are mostly round, oval and rectangular. Ventilation tubes for ships have positive pressure ventilation tube and negative pressure ventilation tube. According to the material, there are mainly: galvanized duct, stainless steel ventilation tube. Ventilation tube structure mainly includes air inlet pipe, air outlet pipe and elbow.
Overview
Type:
1. Because the inlet of centrifugal ventilator is mostly made into a round tube, and in the ventilation pipe system, the round tube and rectangular tube comparison, the round tube occupies a larger space, at the same time, the round 90 ° elbow is more difficult than rectangular 90 ° elbow production, technical requirements are higher, therefore, in many cases, the inlet pipe of the extractor fan is made into a rectangular 90 ° elbow. In order to connect with the inlet pipe of the extractor fan, it is necessary to make a transition joint from circular to rectangular between the circular pipe and the rectangular pipe.
2. The outlet pipe of centrifugal ventilator, to convert the direction, it is best to be consistent with the direction of air flow in the extension. When the length of the outlet pipe joint is shorter, the radius of curvature is smaller, in the elbow of the collar to install guide plate
3. The shape and size of the 90° rectangular elbow. Its minimum inner radius of curvature shall not be less than that of the pipe diameter, and its minimum outer curvature shall not be less than that of the pipe diameter.
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