公开(公告)号：US3825026A

公开(公告)日：1974-07-23

申请号：US36625973

申请日：1973-06-01

Applicant: VAPOR CORP

Inventor： PIECUCH R ,  SALERNO P ,  SIKORCIN J

IPC: F01D17/14 ,  F16K1/12 ,  F16K31/42

CPC classification number: F16K1/126 ,  F01D17/145 ,  F16K31/42 ,  Y10T137/3367

Abstract: A valve for inline duct work including a pilot valve for controlling operation of the valve, together with pilot circuitry which enables the valve to be closed on command in the event of a duct pressure reversal.