A gate valve assembly comprising: - a valve body (108, 201) having a channel extending from a distal end to a proximal end; - a gate configured to be moved from a first position to a second position, the second position being when the gate is positioned in the channel of the valve body (108, 201) between the distal end and the proximal end of the valve body; - a seat insert (104, 106, 202, 222) coupled to the valve body (108, 201); - a seat (114, 116, 208) configured to be positioned within the seat insert (104, 106, 202, 222); - an annular seal (111, 112, 210, 224) adapted to be positioned within a groove of the seat insert (104, 106, 202, 222) and positioned between the valve body (108, 201) and the seat insert (104, 106, 202, 222), the seat insert (104, 106, 202, 222) being configured to receive and accommodate the seat (114, 116, 208) in a counterbore channel with a seat seal (117, 118, 212) on an outside diameter of the seat (114, 116, 208); - a spring (120, 122, 204) positioned between a back face of the seat (114, 116, 208) and the seat insert (104, 106, 202, 222); - wherein the annular seal (111, 112, 210) is a fixed static seal providing no gaps and/or spaces between the seat insert (104, 106, 202, 222) and the valve body (108, 201) allowing no debris to corrupt the seals; - wherein the seat seal (117, 118, 212) provides a very limited dynamic action, - wherein the seat insert (104, 106, 202, 222) and the seat (114, 116, 208) are configured so that the seat (114, 116, 208) is in continuous contact with the surface of the gate through the spring force provided by the spring (120, 122, 204); characterized in that the seat insert (104, 106, 202, 222) is coupled to the valve body (108, 201) by a press fitting, so that the seat insert (104, 106, 202, 222) is fixed into the valve body (108, 201); - wherein when the gate is in a closed position, the seat and the gate have metal to metal contact, - wherein the gate valve assembly further comprises a trash ring positioned within a groove of the seat insert (104, 106, 202, 222) and the seat (114, 116, 208). - a valve body (108, 201) having a channel extending from a distal end to a proximal end; - a gate configured to be moved from a first position to a second position, the second position being when the gate is positioned in the channel of the valve body (108, 201) between the distal end and the proximal end of the valve body; - a seat insert (104, 106, 202, 222) coupled to the valve body (108, 201); - a seat (114, 116, 208) configured to be positioned within the seat insert (104, 106, 202, 222); - an annular seal (111, 112, 210, 224) adapted to be positioned within a groove of the seat insert (104, 106, 202, 222) and positioned between the valve body (108, 201) and the seat insert (104, 106, 202, 222), the seat insert (104, 106, 202, 222) being configured to receive and accommodate the seat (114, 116, 208) in a counterbore channel with a seat seal (117, 118, 212) on an outside diameter of the seat (114, 116, 208); - a spring (120, 122, 204) positioned between a back face of the seat (114, 116, 208) and the seat insert (104, 106, 202, 222); - wherein the annular seal (111, 112, 210) is a fixed static seal providing no gaps and/or spaces between the seat insert (104, 106, 202, 222) and the valve body (108, 201) allowing no debris to corrupt the seals; - wherein the seat seal (117, 118, 212) provides a very limited dynamic action, - wherein the seat insert (104, 106, 202, 222) and the seat (114, 116, 208) are configured so that the seat (114, 116, 208) is in continuous contact with the surface of the gate through the spring force provided by the spring (120, 122, 204); characterized in that the seat insert (104, 106, 202, 222) is coupled to the valve body (108, 201) by a press fitting, so that the seat insert (104, 106, 202, 222) is fixed into the valve body (108, 201); - wherein when the gate is in a closed position, the seat and the gate have metal to metal contact, - wherein the gate valve assembly further comprises a trash ring positioned within a groove of the seat insert (104, 106, 202, 222) and the seat (114, 116, 208). - wherein when the gate is in a closed position, the seat and the gate have metal to metal contact, - wherein the gate valve assembly further comprises a trash ring positioned within a groove of the seat insert (104, 106, 202, 222) and the seat (114, 116, 208).