公开(公告)号：US3801066A

公开(公告)日：1974-04-02

申请号：US3801066D

申请日：1971-07-01

Applicant: JAMESBURY CORP

Inventor： MILES M ,  DONNELLY J

IPC: F16K1/228

CPC classification number: F16K1/2285

Abstract: Disclosed is a butterfly valve particularly adapted for service with cryogenic fluids at temperatures down to -320* F and lower wherein a butterfly valve is provided with a seat that has a configuration that permits the seat to shrink upon exposure to lowered temperatures and to engage a protrusion in the valve housing. The forces generated by the shrinkage of the seat and the engagement with the protrusion cause the seat to deform in a controlled manner and maintain sealing engagement with the butterfly disc despite the dimensional changes of the valve components attributable to exposure to the cryogenic fluid.

Abstract translation: 公开了一种蝶阀，特别适用于在低于-320°F及更低的温度下使用低温流体的蝶阀，其中蝶阀设置有座椅，该座椅具有允许座椅在暴露于降低的温度下收缩并且接合 突出在阀壳体中。 由于座椅的收缩和与突起的接合而产生的力导致座椅以受控的方式变形并且保持与蝴蝶盘的密封接合，尽管由于暴露于低温流体而导致的阀部件的尺寸变化。