When fully open, there is low resistance to fluid flow. The opening in the valve tends to mimic the cross sectional characteristics of connected piping and fluid can flow through the valve without a directional change.
Changing the gate position (opening or closing the valve) does not require as much force or power as some other valve types, due to the gate movement being perpendicular to the flow direction.
Gate valves work in both directions. The flow in the connected line can be reversed and the valve function is unimpaired.
The gate valve assembly tends to be shorter in length along the path of flow than some other designs.
The rate of closure is generally slow, providing a graduated reduction in fluid movement and reduced physical shock to the piping system.