Patent ID: 6196523
Filing Date: 2001-03-06
Classification: F16K

Abstract:
A stop valve adapted to bring a closure member (12) into closing contact with a valve seat (15) by a thrust of an output portion (27) connected to a thrust screw member (23), which results from advancing the thrust screw member (23) to a housing (2) through a tightening rotation of a handle (26), the stop valve comprising:a stopper member (20) provided between the housing (2) and a valve-closing thrust transmission system (T) which extends from the handle (26) to the output portion (27); anda switching-over device (30) for switching over the stopper member (20) to a stopping condition (X) which prevents the output portion (27) from further moving for valve closing over a predetermined distance and to a stop cancelling condition (Y) which allows the output portion (27) to further move for valve closing over the predetermined distance.