| 摘要 |
A valve member ( 1 ) for a balanced pressure reducer, said valve member ( 1 ) having a wide head ( 1 ') designed to co-operate with a valve seat ( 6 ), said valve member ( 1 ) having a central body ( 2 ) made of a material that is hard and that withstands high pressures, said central body ( 2 ) being covered at least in part with a first layer ( 3 ) of a rigid plastics material, said first layer ( 3 ) of a rigid plastics material being covered at least in part with a second layer ( 5 ) of a less rigid plastics material, no contact between the less rigid second layer ( 5 ) and the central body ( 2 ) occurring in that zone of said valve member ( 1 ) which is subjected to the high pressures.
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