| 摘要 |
A fully recyclable valve housing adapted for engagement with a neck of a container such as a beer keg, has an inner port 25 for liquid and a concentric outer port 14 for pressurised gas, with openings 21 for admitting pressurised gas into the container. A dip tube 5 is connected to a bottom end fitting 4, communicating with a valve stem 8 within the valve housing. A valve member 6 is arranged to control flow through at least one of the ports, and a spring element 7 located about the valve stem 8 urges the valve member upwards to close the ports. The spring element 7 is moulded from a resilient polymeric material and comprises a plurality of interconnected sections arranged such that movement of the valve member 6 by means of a valve-operating member causes concurrent resilient deformation of all the sections. Preferably, the interconnected sections are arranged in two stacks which are interconnected at alternate junctions between adjacent sections. The sections may be C-shaped and interconnected at the ends of the C-shapes. |
