Automatic retention valve for protecting a fluid meter
作者： Franceschini Lorenzo
DOI:
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摘要: Automatic retention valve 7 for fluids, intended to protect the meter when it is traversed by fluid at an excessive speed, this being elastically pushed against seat 8 of a standard connector 1 provided between duct and casing 9 meter.
lens.org 参考文章(2)
W Sullivan, Float valve for drill strings ,(1971)
Seppelfricke Otto Dipl Ing, Water meter outlet and stop valve screw connection - has collar on stop ledge, and valve cone shaft near disc seal ,(1981)