1. Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.

2, double gate valve should be installed vertically (that is, the valve stem is in a vertical position, handwheel at the top).

3, gate valve with bypass valve should be opened before opening the bypass valve (to balance the pressure difference between the import and export and reduce the opening force).

4. The gate valve with drive mechanism shall be installed according to the provisions of the product operation manual.

5, if the valve is often used, lubricate at least once a month.