Patent ID: 7950410
Filing Date: 2011-05-31
Classification: F16K,Y10T

Abstract:
1. A gate valve comprising: a valve body having a generally cylindrical passage defining a flow path through the gate valve; a gate for controlling fluid flow through the gate valve, the gate being translatable in a plane perpendicular to the flow path between an open position, in which fluid flows through the gate valve and the gate, and a closed position, in which fluid flow through the gate valve is obstructed; respective cylindrical valve seats received in the flow path on each side of the gate, each cylindrical valve seat having an inner end that abuts the gate with a gate wiper ring that cleans the gate when the gate is opened or closed; a wear sleeve received in respective valve body ports of the gate valve, the wear sleeves having respective inner ends received in respective outer ends of the respective cylindrical valve seats and an O-ring groove that receives an O-ring for providing a fluid seal between the wear sleeve and said respective valve body ports; a cylindrical gate insert received in the flow path through the gate and retained in the flow path through the gate by a mechanical fastener; and the cylindrical gate insert, the respective cylindrical valve seats and the respective wear sleeves providing, in combination, a replaceable flow-path liner that protectively lines an entire length of the flow path through the valve body and the gate.