| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage trap, which can maintain a deodorizing effect even in the event of destruction of seal water, and can reduce an effect on sewage even when draining high temperature drainage water or chemicals. SOLUTION: In the drainage trap 10, a membrane valve 20 that is a check valve is mounted on a lower part of an inner cylinder 18, with a lower portion of the membrane valve 20 being arranged in seal water F. Even if the seal water is eliminated, the membrane valve 20 can prevent odor from the sewage side from leaking to the upstream side. Since the seal water F dilutes the high temperature drainage water or chemicals, the effect on the sewage side can be reduced. COPYRIGHT: (C)2010,JPO&INPIT
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