Patent ID: 7481239

Claim:
A gate valve comprising: a valve body having a generally cylindrical passage defining a flow path bore through the valve; a gate for controlling fluid flow through the valve, the gate being moveable in a plane perpendicular to the flow path bore between an open position, in which fluid flows through the valve and the gate, and a closed position, in which fluid flow is obstructed; first and second valve seats received in the flow path bore adjacent the gate, the first and second valve seats having respective inner ends that respectively abut opposite sides of the gate and outer ends received in the flow path bore; first and second wear sleeves that line respective first and second ports of the flow path bore, the first and second wear sleeves having respective inner ends received in respective said outer ends of respective said first and second valve seats; and a replaceable gate insert for protecting the flow path through the gate, the first and second valve seats, first and second wear sleeves and replaceable gate insert providing a replaceable steel flow-path liner received within the valve body for protectively lining an entire length of the flow path bore through the valve and the gate.