| 摘要 |
<p>PURPOSE:To change instantaneously from closed to open condition of a valve by disposing a liquid guide of a shape to accelerate the pressurized liquid flow from a flow port when the valve of a seal means is in the closed condition at an opposite portion of the selfsealing means opposite to the surface of an elastic seal member. CONSTITUTION:A bellows 30 with its one end fixed airtightly and with its other end closed with a bellows end plate 32 is housed in a housing 15 having an inlet port 21 and an outlet port 22. The internal side of the bellows end plate 32 is provided with an elastic seal member 35. An inner pipe portion 16 and an end member 17 having a flow port 18 is disposed in the housing 15 to form a wedge-shaped liquid guide section 55 with the end member 17 and a peripheral wall 52 extending to a recess 51 of the elastic seal member 35. If pressurized liquid flows into the housing 15 when the valve of self-sealing means 37 is in the closed condition, a force is exerted in the direction to separate the elastic seal member 35 from the end member 17 and to smoothly shift to the open valve condition.</p> |
