This is a Gate Valve, a manually operated shut-off valve. It controls the full opening or closing of pipeline media (not suitable for flow regulation) by rotating the top handwheel to drive the gate plate up and down. Made of metal (usually stainless steel), it features excellent sealing performance and low flow resistance. It is commonly used in industrial pipeline systems such as petroleum, chemical industry, water supply and drainage, and is suitable for working conditions with high sealing requirements.