PURPOSE: To improve the working environment by preventing the production of a large amt. of dust containing a glass fiber by providing an intermediate tank part having a specific shape and composed of a crosslinked polymer between an upper tank part and a lower tank part.
CONSTITUTION: An upper tank part 1 and an intermediate tank part 3 are fixed by flanges 4, 4" while the intermediate tank part 3 and a lower tank part 2 are fixed by flanges 4', 4". By providing the intermediate tank part 3, even when the upper and lower tank parts 1, 2 having the same shape are used, a purifying tank increased in its internal volume can be formed. The upper, intermediate and lower tank parts 1, 3, 2 of the large-scaled purifying tank are molded products composed of a crosslinked polymer of metathesis polymerizable olefin. Since the molded product does not contain a reinforcing material such as a glass fiber, though a material itself is low in rigidity, the upper and lower tank parts 1, 2 are enhanced in rigidity as a whole based on the shapes of the ribs 5, 5' thereof. The intermediate tank part 3 is reinforced by usual rod-shaped ribs 6.
YOSHIDA EIJI
HENMI KATSUICHI
YAMADA KENKO
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