To prevent easily the water leakage from a packing member at a bearing section with the valve spindle in a valve casing without cutting off the water in the pipeline.
A preventive device of water leakage of a gate valve etc., is equipped with a valve body and a valve spindle 6, and the leakage of water from the valve spindle 6 is prevented by a packing member 8 and a packing gland 9 that are provided so as to surround the valve spindle 6 at the bearing area of the valve spindle 6. When the water is leaked from the packing member 8, this preventive device of water leakage has moreover the first annular seal member 12 that one end face is contacted closely to the position surrounding the outside of the packing member 8, and an inner circumference face is contacted closely to the packing gland 9 between the valve casing 2 and a packing gland 9; the fixing member 17 that is fixed to the packing gland 9 and faces in a specified distance to the outer circumference face of the valve spindle 6, in the side of valve spindle 6 extended to the outside operation means from the packing gland 9; and the second annular seal member 13 that is installed tightly in the close contact condition, so that an inner circumference face is closely contacted to the outer circumference of the valve spindle 6 against the fixing member 17.
Tetsuo Fukuda
Tatsuhiko Inukai
Atsuko Nakamura
Takashi Ishioka
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