1. Handwheel, handle and transmission mechanism are not allowed for lifting, and is strictly prohibited collision.
2. Double gate gate valve should be installed vertically (that is, the stem is in the vertical position and the handwheel is at the top).
3. Valve with bypass valve should be opened before opening the bypass valve (in order to balance the import and export pressure difference and reduce the opening force).
4. With the transmission mechanism of the gate valve, according to the specifications of the product installation.
5. If the valve is often used, lubricate at least once a month.
6. Gate valve only for full open, all the various types of pipelines or equipment on the operation of the media, not allowed for throttling.
7. With handwheel or handle of the gate valve, the operation shall not increase the auxiliary lever (if the seal is not strict, you should check the repair of sealing surface or other parts). Hand wheel, handle rotate clockwise to close, turn on vice versa. The gate valve with transmission mechanism shall be used in accordance with the specification of the product.