Non-stagnant piping system

Details Non-stagnant piping system Non-stagnant piping system

1994-07-18

1995-12-19

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

137563, 251331, F17D 108

Patent

active

054761182

ABSTRACT:
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.

REFERENCES:
patent: 1471800 (1923-10-01), Nalley
patent: 2842400 (1958-07-01), Booth
patent: 3075740 (1963-01-01), McIntosh
patent: 4535917 (1985-08-01), Trewhella

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