| 摘要 |
<p>Dispensing apparatus (1) for a pressurised dispensing container has a valve, a valve actuator and a flow regulator comprising a washer (13) located in a housing (11) such that an aperture (14) of the washer forms a constriction presenting an impedance to the flow. The washer (13) is resiliently deformable to vary the impedance presented by the constriction in response to variation in the pressure differential across the washer (13) such that in use with a pressurised container having a finite resource of pressurising gas the tendency for the flow rate to decrease with depletion of the gas pressure is compensated by a tendency for the flow rate to increase due to decreased impedance of the flow regulator. The washer (13) has a recessed downstream face (16) which co-operates with a planar seat (15) of the housing such that the washer deforms towards the seat. The apparatus enables containers to be pressurised with nitrogen whilst maintaining a constant flow rate throughout the dispensing life of the container.</p> |
