THREE-WAY VALVE Russian patent published in 2002 - IPC

FIELD: remote control systems of pipe lines handling various media. SUBSTANCE: proposed three-way valve with flow-through and control channels has body with inlet, outlet and drain branch pipes, pusher connected with shut-off member, two sealing surfaces and two seats. Valve is provided with second spring-loaded shutoff member which is fitted for mechanical contact of its sealing surface with second seat. First spring-loaded shut-off member is fitted for mechanical contact of its sealing surface with first seat. One of them may be pressed to seat and other may be released from seat. EFFECT: extended functional capabilities of valve. 5 cl, 1 dwg