Allowable variation in the dimensions of dust collector and baghouse filter bag cages
In recent years, with the promotion using of dust collector, the filter bags types are becoming more and more, as supporting part of baghouse filter bags, filter bag cages strength need to be increased by adding its wires number and diameter. Then, what is allowable variation in the dimensions of filter bag cages during inspection?
SIIC team from INDRO filtration introduces you about the matching of filter bags and cages as followings:
During the operation of dust removal equipment, the bag cage and filter bag are in close state. If the size matching is not considered when installing, it is easy to wear and even damage the filter bag. How to match size of filter bag and cages?
/If the filter bag cages diameter is too large, it will take troubles to loading and unloading; if the baghouse cages diameter is too small, that will cause a collision between filter bags and cages, and then wear the filter bag until it is scrapped.
/When selecting pps filter bags, the filter bags diameter shall be larger than filter cage diameter by 5-7mm, and the baghouse filter bags length shall be larger than cages by 0.4%-0.6%.
/When selecting ptfe laminated fiberglass filter bags, the filter bags diameter shall be larger than cage diameter by 3-5mm, and the dust filter bags length shall be larger than cages length by 0.2%-0.4%.
/Filter bag cages must be shorter than filter bags. Exact length of filter bag cages depends on filter bags length and filter bags materials. When dust collector is running, because of filter bag cages’ thermal expansion and filter bags’ heat shrinkage, the filter bag cages probably be ejected out of the plate sheet by filter bags, and the filter bags will be damaged easily.