F - Mech Eng,Light,Heat,Weapons – 17 – D
Patent
F - Mech Eng,Light,Heat,Weapons
17
D
F17D 1/08 (2006.01) E03B 7/07 (2006.01) F16K 5/06 (2006.01) F16K 51/00 (2006.01) F16L 55/027 (2006.01)
Patent
CA 2081010
The present invention relates to a non-stagnant piping system and it is an object of this invention to provide a piping system such that the fluid inside the upstream side piping of a valve portion and inside the valve will not become stagnant in a super pure water line and chemical solution, etc., regardless of whether the valve is in a closed or opened state. A diaphragm valve 3 having a by-pass means 3b installed on the upstream side of the valve portion 3a is mounted in the sub-line 2 branched from the main line 1 in the piping system, and a pressure reducing unit 4 having a pressure reducing portion by a throttling portion 4a, and a by-pass 4b communicating with the throttling portion 4a is installed on the downstream side of the branch point with the sub-line 2 in the main line 1, and moreover, both by-pass means 3b and 4b communicate with each other.
Asahi Yukizai Kogyo Co. Ltd.
Goudreau Gage Dubuc
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