1. The hand wheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
2. The double gate valve shall be installed vertically (i.e. the valve stem is in the vertical position and the hand wheel is on the top).
3. The gate valve with bypass valve shall open the bypass valve before opening (to balance the pressure difference between inlet and outlet and reduce the opening force).
4. The gate valve with transmission mechanism shall be installed according to the provisions of the product operation manual.
5. If the valve is often opened and closed, lubricate it at least once a month.
