1. The handwheel, the wheel and transmission mechanism is strictly prohibit to lifting and collision .
2. The double gate valve should be installed vertically (ie, the stem is in the vertical position and the handwheel is at the top).
3. If the gate valve with a bypass valve, the bypass valve should be opened first (to balance the pressure difference between the 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 instruction manual.
5. If the valve is used frequently, should do lubricate at least once a month.
