| 摘要 |
PROBLEM TO BE SOLVED: To protect a valve membrane and increase the safety, by assembling the valve membrane elastically formed in order to open/close the opening, in a cylindrical valve housing formed as a plug with screw threads and providing an inflow cover and an inflow disk. SOLUTION: The central boss 10 of a plug 3 with screw threads is held by ribs 11 and a ventilation opening 13 is formed between the ribs 11. The valve membrane 4 is elastically formed in order to open/close the ventilation opening 13 and an inflow cover 6 is pushed in onto the inside end of the boss 10 and held therein. And further, a ring web 25 is formed at the inside edge 24 of the ring shoulder 12 to support the valve membrane 4. And an inflow disk 5 provided with a ventilation opening 30 at the center is fitted between the valve membrane 4 and the inflow cover 6 to form a labyrinth to protect the valve membrane 4 from the inflow liquid penetrating into the valve 1, together with the inflow cover 6. |
