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Home> Products > Direct boring steel pipe & Multi phase steel pipe |
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 Valve insertion |
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| Valve injection |
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Patent No. 0445241
Opening & shutting valve is carried in zig-zag & regular intervals to the steel pipe that is used for complimenting of tunnels and inclined plane.
Liquid to be injected inside of the steel pipe is sprayed to outside of steel pipe,
Opening & shutting valve that protects the couter-flowing to inside, the inside of valve is made with
slope(being tapered) from lower part to upper part and in lower part, there is rubber cap of flange
through special-molding the 'L' type inside of the lower part of the valve. |
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