Gate valves are primarily used to start or stop the flow of fluid in a pipeline. They operate by lifting a gate out of the flow path, allowing unobstructed flow when fully open. These valves cause very low pressure drop, making them suitable for long pipeline runs. Gate valves are not recommended for throttling applications as partial opening can damage the gate. They are widely used in water supply systems, oil and gas pipelines, and industrial process lines. Their simple design ensures durability and reliable performance. Available in various materials, they can handle high pressure and temperature conditions. Gate valves are ideal where infrequent operation is required.