Gate valve bonnet assembly with built-in speed reducer

Details Gate valve bonnet assembly with built-in speed reducer Gate valve bonnet assembly with built-in speed reducer

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 3/316 (2006.01) F16K 31/122 (2006.01) F16K 31/48 (2006.01) F16K 47/00 (2006.01)

Patent

CA 2204681

A gate valve bonnet assembly is disclosed which includes a built-in speed reducer. The bonnet assembly includes a bonnet housing which is attached to a body of the gate valve with the bonnet housing having a central bore therethrough and a chamber along the central bore. A valve stem is movably positioned with the central bore and coupled to the valve gate and to the valve actuator. A piston is slidably received on the valve stem and is positioned within the chamber, the piston including at least one damping holetherethrough. A flange is attached to the valve stem to abut against the piston to move the piston when the valve stem is moved between the closed position and the open position. Additionally, a spring is provided for independently moving the piston to the original position when the valve stem is moved between the open position and the closed position.

Couvercle de vanne comprenant un réducteur de vitesse intégré. Le couvercle comprend un logement qui est attaché au corps de la vanne, le couvercle étant muni d'un trou central et d'une chambre située le long de ce trou central. Une tige de vanne, mobile, est positionnée dans ce trou central et couplée à la vanne proprement dite et à l'actionneur de vanne. Un piston coulissant est reçu sur la tige de vanne et positionné à l'intérieur de la chambre, le piston comprenant au moins un trou d'amortissement. Une bride est attachée à la tige de vanne et aboute contre le piston pour déplacer ce dernier lorsque la tige de vanne est déplacée entre la position fermée et la position ouverte. De plus, un ressort est prévu pour déplacer le piston indépendamment à sa position initiale lorsque la tige de vanne est déplacée entre la position ouverte et la position fermée.

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