Non-welded hardface gate and seats

A gate valve, comprising:

• a valve body with a flow passage intersected by a gate cavity;
• a gate with an axis, a gate body, the gate body having a downstream gate body face, and an upstream gate body face on an opposite side of the gate body as the downstream gate body face, the gate being axially movable in the gate cavity between a gate closed position and a gate open position, the gate having a gate opening that registers with the flow passage when the gate is in the gate open position;
• a seat ring located between each gate body face and the valve body, at the intersection of the flow passage and the gate cavity, each seat ring having a hole extending through the seat ring that registers with the flow passage of the valve body, and a seat ring face proximate to the gate, wherein at least one of the seat ring faces forms a sealing interface with the gate;
• at least one removable insert being located at the sealing interface between one of the gate body faces and one of the seat ring faces, the insert being formed of a material harder and more wear resistant as compared to the gate body and the seat ring;
• and
• a channel on one of the faces, and a rib on the removable insert for mating with the channel and removably coupling the removable insert to the one of the faces.

A gate valve, comprising:

• a valve body with a flow passage intersected by a gate cavity;
• a gate with an axis, a gate body, a downstream gate face, and an upstream gate face on an opposite side of the gate body as the downstream gate face, the gate being axially movable in the gate cavity between a gate closed position and a gate open position;
• a seat ring located between each gate face and the valve body, at the intersection of the flow passage and the gate cavity, each seat ring having a hole extending through the seat ring that registers with the flow passage of the valve;
• at least one gate face comprises a removable gate insert formed of a material harder and more wear resistant as compared to the gate body, the gate insert having an inner surface that engages an outer surface of the gate body;
• and
• a plurality of elongated mating ribs and channels located on the gate insert and the gate body, the ribs and channels having mating shoulders to prevent the gate insert from being moved away from the gate body in a direction normal to a plane containing the outer surface of the gate body.