There are two methods of high vacuum extraction.
Welding fume extraction system design calculation.
The calculation for the cfm of a fume hood is obtained by multiplying the face opening window of the fume hood and the face velocity.
However experience with welding fume extraction is equally important.
The correct sizing and planning of the ventilation system is therefore crucial.
The face opening value is the maximal open width x height for your fume hood while face velocity references the capture distance i e.
Weld fume smoke collection systems in portable and stationary designs are available to collect welding fumes from point sources and ambient environments.
Recirculating hood system ductless hoods or ventless hoods a self contained air exhaust system that removes grease vapors fumes smoke steam and odors from the.
Although fume extraction may be the first solution that comes to mind other options should be considered as well.
The extraction airflow is approximately 35 to 60 cfm 60 100 m3 hr for integrated fume extraction guns.
Reducing fume generation welding design considerations.
Reducing fume generation limiting operator exposure to fume.
Every application has different requirements.
There are ways of calculating the correct size.
Welding guns with built in extraction fume extraction guns or separate suction nozzles of various designs.
Depth of the fume hood.
For example when.
Approaches to controlling welding fume actually fall into two broad categories.
Use fume capture nozzles built into the gun tube and handle.
Side view of fume distribution for the original design at the low left and high right flow rate on a central plane.
Table 2 summarises the results of fume capture showing the fraction of fume captured by the extraction system for the original design.
The airflow volume describes the quantity of air flowing through a pipe over a specified time.
Irrespective of whether the system is for spot extraction or hall ventilation.
In welding companies there are certain cases in which capturing the welding fumes at the source may not be feasible in practice.
The airflow volume is one of the factors which decides how effective a welding fume extraction system is.
