Portable Fume Extractor Plant
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WHEN welding or other operations, WV which tend to produce harmful air conditions, are being conducted in confined spaces, some means for carrying off the foul air and fumes is essential to the well-being of the operative.
Normally, of course, fume exhausters are installed where the work is carried out on fixed sites, but there are numerous instances where, say, the welding plant has to be taken to the job, and there are no facilities for carrying away the heat, smoke and fumes.
This need has been met by the Lincoln Electric Co., Ltd., Welwyn Garden City, Hens, with the introduction of a portable fume remover known as the Linconditioner.
It consists of an electric motor, enclosed by a circular type of reinforced fire-proofed filter. The motor is arranged vertically, and drives a lightmetal impeller which draws the contaminated air away from the job. Before the air again reaches the atmosphere it passes through the filter, which, incidentally, takes but a few minutes to clean and replace.
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The average life of a filter element is from 30-35 working hours, but this would be governed largely by the duty that the exhauster was called upon to perform. The cloth used in the filter is fire-proofed, the total filtering area being 1,000 sq. ins.
The motor and filter unit are enclosed in a mild-steel cover, and there is a 3-in.-diameter flexible hose, provided with a suction hood, centrally disposed on the top.
The Linconditioner is made in six sizes in capacities ranging from 170-250 cubic ft. per min.
The length of hose supplied varies with the capacity of the plant, that with the largest machine being 10 ft., and with the smallest, 35 ft. Current consumption of the 250 cubic-ft.-permM. exhauster is given as 440 watts, and of the 170 ft.-per-min. appliance, 370 watts, so that the running costs are extremely moderate.
This portable method of keeping the air clean is no less efficient than an in-built system, for which reason it should make an appeal to owners of small premises.