Gate valve with replaceable inserts
AssigneeStinger Wellhead Protection, Inc.
InventorsBob McGuire, L. Murray Dallas
Life of this patent
Estimating the term…
Abstract
A gate valve includes a valve body having a cylindrical passage defining a flow path through the valve, a gate for controlling fluid flow through the valve and a replaceable wear-resistant flow-path liner for in the flow path. The flow-path liner includes a plurality of replaceable wear-resistant inserts, including wear sleeves lining ports of the valve body, valve seats and a gate insert for a flow path bore through the gate. Each replaceable valve seat has a wiper ring for cleaning the gate when it opens and closes. By regularly inspecting and replacing worn-out inserts, the service life of the gate valve can be prolonged and the expense associated with replacing or rebuilding the valve body is avoided.
Claims20
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.
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 is obstructed;
- respective cylindrical valve seat received in the flow path on respective sides of the gate, each cylindrical valve seat having an inner end that abuts the gate;
- 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;
- a cylindrical gate insert received in the flow path through the gate;
- and
- the cylindrical gate insert, the respective cylindrical valve seats and the respective wear sleeves providing, in combination, a replaceable steel flow-path liner received within the valve body for protectively lining an entire length of the flow path through the valve body and the gate.
A gate valve comprising:
- a valve body having opposed valve body ports with a generally cylindrical passage defining a flow path through the respective valve body ports and the valve body;
- a gate for controlling fluid flow through the flow path, the gate that may be moved in a plane perpendicular to the flow path between an open position in which fluid flows through the flow path and the gate, and a closed position in which fluid flow through the flow path is obstructed;
- respective cylindrical valve seats received in the flow path on opposed sides of the gate, each cylindrical valve seat having an inner end that abuts a respective side of the gate;
- a wear sleeve received in the opposed valve body ports, the wear sleeves having respective inner ends received in respective outer ends of the respective cylindrical valve seats;
- a cylindrical gate insert that protectively lines the flow path through the gate;
- wherein the cylindrical gate insert, the respective cylindrical valve seats and the respective wear sleeves provide, in combination, a steel flow-path liner received within the valve body and the opposed valve body ports for protectively lining an entire length of the flow path.
Dependencies are inferred from the claim text.