| 摘要 |
Dispensing apparatus for dispensing pressurised fluid comprising a valve body defining a chamber and a valve member extending movably through the chamber and through at least one annular seal co-operating with the valve member and the body to regulate the discharge of fluid. The seal is formed from a material comprising A a copolymer of ethylene and propylene or B a terpolymer of ethylene, propylene and a diene, or C a material selected from isobutylene isoprene, polychloroprene or fluorinated rubber. The seal may contain a mineral filler.
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