B.T.T. machine manufacturing includes acid fume purification plants for fumes coming from goldsmith production: hydrochloric fumes, nitric fumes or aqua regia fumes.
The materials we use to manufacture the purification plants are PP, PVC, stainless steel, and always the best material for the specific problem.
B.T.T. standard purification plants do not exist. B.T.T. company manufactures everything on customer's request.