WEAR-RESISTANT SHUTOFF ASSEMBLY ''IGR'' Russian patent published in 2014 - IPC F16K3/02 F16K3/314 

FIELD: machine building.

SUBSTANCE: wear-resistant shutoff assembly "IGR" comprises a casing with passage openings, inlet and outlet branch pipes, seats and a gate valve with a passageway set in it, a shutoff part, transverse grooves and annular ceramic elements on both sides of the shutoff part; the invention proposes that the transverse grooves are made at a distance being not less than the contact width of the seat from the edge of the gate valve passageway, and the contact surfaces of seats are fitted by annular ceramic elements.

EFFECT: wear-resistant shutoff assembly "IGR" allows for the increased reliability of the shutoff assembly in both gate valve and ball valve versions due to the efficient dimensions, shape and arrangement of balancing abradant-removing grooves, protection of seats by ceramic rings and consideration of errors of their mutual alignment with the rings of the movable shutoff element in the position "Closed".

6 cl, 5 dwg