Embodiments of a gate valve equalization system comprise: a gate valve; a gate; a preloading valve arrangement; a floating coupler assembly; a relief valve arrangement; and a means for control. The preloading valve arrangement permits fluid to enter the valve body from the upstream side of the gate. The means for control serves as a control interface allowing engagement of the floating coupler assembly and opening/closing of the gate valve. Engagement of the floating coupler, engages the assembly relief valve arrangement and allows redistribution of fluid pressure and circulation of fluid from one side of the gate to opposing side of the gate within the gate valve.