The filter shall be suitable for continuous operation in open air.
Also these filters are used in other industries such as paper FGP & Co has designed and built two models, 400ft² and 1000ft² have been used in the oil and refining.
Separator filter wax from oil
Equipment specification for rotary vacuum DE waxing /DE oiling filter
These specifications are for horizontal drum type Continuous vacuum filter in which the drum rotates partially submerged in a chilled solution of oil and solvent, containing wax crystals.