DOUBLE-CIRCUIT COCK Russian patent published in 2009 - IPC F16K11/07 F16K31/54 

FIELD: machine building.

SUBSTANCE: invention is related to pipeline valves and is intended for use as stop distribution valve for application in gas equipment, chemical industry, machine building, etc. Double-circuit tap includes body with two parallel channels and valves in them. The latter contact to four supports. Both valves are arranged with tubular structure in the form of hollow cylinder. Every valve consists of two elements: large valve and small valve. Large valve is arranged with contact end and teeth in the form of rack on side surface. Contact end of small valve is arranged in the form of collar. Large and small valves are connected to each other by means of bushing and spring. Bushing has side opening for flow of working medium. In tap body between two channels there is stem installed perpendicularly to valve axes. Stem gear is engaged with teeth of large valves.

EFFECT: reduction of control forces with provision of manual control of cocks, and also increase of its operational reliability.

3 dwg