| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal structure of a flow control valve, capable of reducing sliding resistance as much as possible while satisfactorily sealing a gap between a valve element and an axial sliding surface of a valve housing when seal is needed. SOLUTION: In a pressure balance valve which is configured to reduce inflow rates of water and hot water by moving a balance valve element 76 along an axial sliding surface 86 of a valve housing 66 to change openings of a water inflow passage 72 and a hot water inlet passage 74, seal members 92, 94 which seal gaps caused by a fitting clearance C between the axial sliding surface 86 and a water-side valve element 82 and hot water-side valve element 84 of the pressure balance valve are formed of flexible membrane-like members. The seal members 92, 94 are pressed and closely fitted onto corresponding seal wall surfaces 100, 102 by hydraulic pressure introduced to the gaps to seal the gaps. COPYRIGHT: (C)2011,JPO&INPIT
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