A gate valve assembly comprising: a valve body 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 between the distal end and the proximal end of the valve body; a seat insert (104, 106) configured to be positioned into a pocket of the valve body; a seat (114, 116) configured to be positioned within the seat insert (104, 106); a seal member (111, 112) positioned within a first groove of the seat insert (104, 106) and between the valve body and the seat insert (104, 106); a spring (120, 122) positioned between the seat (114, 116) and the seat insert (104, 106); wherein the seal member (111, 112) is a fixed static seal providing no gaps and/or spaces between the seat insert and the valve body allowing no debris to corrupt the seal member, wherein the seat is continually forced towards the gate in response to force from the spring, characterized in that the seat insert (104, 106) is configured to be threaded into a pocket of the valve body; the seat (114, 116) and the gate form both high pressure and low pressure metal-to-metal seals with each other in response to force from the spring; and in that during operation of the gate valve, fluid enters into the channel and a valve body pressure is automatically de-energized to a downstream pressure of the channel as the valve body pressure moves the seat (114, 116) toward the seat insert (104, 106) by pushing the spring (120, 122) thereby creating a gap between the gate and the seat (114, 116) so that the valve body pressure is drained to equal to a lowest pressure of the sides of the channel. a valve body 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 between the distal end and the proximal end of the valve body; a seat insert (104, 106) configured to be positioned into a pocket of the valve body; a seat (114, 116) configured to be positioned within the seat insert (104, 106); a seal member (111, 112) positioned within a first groove of the seat insert (104, 106) and between the valve body and the seat insert (104, 106); a spring (120, 122) positioned between the seat (114, 116) and the seat insert (104, 106); wherein the seal member (111, 112) is a fixed static seal providing no gaps and/or spaces between the seat insert and the valve body allowing no debris to corrupt the seal member, wherein the seat is continually forced towards the gate in response to force from the spring, characterized in that the seat insert (104, 106) is configured to be threaded into a pocket of the valve body; the seat (114, 116) and the gate form both high pressure and low pressure metal-to-metal seals with each other in response to force from the spring; and in that during operation of the gate valve, fluid enters into the channel and a valve body pressure is automatically de-energized to a downstream pressure of the channel as the valve body pressure moves the seat (114, 116) toward the seat insert (104, 106) by pushing the spring (120, 122) thereby creating a gap between the gate and the seat (114, 116) so that the valve body pressure is drained to equal to a lowest pressure of the sides of the channel.