| 摘要 |
Dispensing apparatus 1 for a pressurized 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 is resiliently deformable to vary the impedance presented by the constriction in response to variation in the pressure differential across the washer such that in use with a pressurized container having a finite resource of pressurizing 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 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 pressurized with nitrogen while maintaining a constant flow rate throughout the dispensing life of the container. |
