Title: Blow-off cock for a steam vessel
Application Number: 94190988 Application Date: 1994.01.20
Publication Number: 1116816 Publication Date: 1996.02.14
Approval Pub. Date: 1999.07.07 Granted Pub. Date: 1999.07.07
International Classifi-cation: A23N7/00;F16K39/02
Applicant(s) Name: Goudsche Machinefabriek B.V. Address:
Inventor(s) Name: Peter Van Der Schoot
Attorney & Agent: HE PEISHUO
Abstract:
    A blow-off cock (5; 50) for a steam vessel (1), comprising a housing (9; 51) having a supply opening and a blow-off opening, the supply opening being closable by means of a valve member (15) comprising a valve disc (16), a piston member (17) and a shank member (19) connecting the valve disc and the piston member, the piston member forming a wall of a cylindrical chamber (13) movable through displacement means (6), and a blow-off duct, connecting to the blow-off opening, extending substantially transverse to the cylindrical chamber. The cylindrical chamber (13) is connected to the steam vessel side of the valve disc (16) by means of an open passage (18) in the valve member (15). The passage has a mouth in the cylindrical chamber adjacent to the piston member (17) and a guarded mouth at the valve disc. The width of the passage is such that when the blow-off cock (5; 50) is opened, the pressure at the valve disc decreases more quickly than in the cylindrical chamber, while the displacement means press the valve member toward its open position independently of the pressure decrease.
Time: 11