About the gate valve Installation ,you need follow this steps：
1.Handwheel and transmission mechanism are not allowed for lifting, any collision is strictly prohibited.
2.Double gate valves should be installed vertically (i.e. the stem is in a vertical position and the handwheel is at the top).
3.Gate valves are only used for full opening or closing. Partial opening and closing are not allowed to prevent the sealing surface from being damaged when the medium flow rate is high.
4.The gate valve shall be opened and closed by rotating handwheel and shall not be opened with the aid of other auxiliary levers.
5.The gate valve should be oiled in the rotating part, and the trapezoidal thread part of the stem should be lubricated for rotation easily and corrosion protection.
6.When installation, the inner cavity and sealing surface should be cleaned to avoid any dirt attachment.
7.The connecting bolts should be tightened evenly.
8.Check if the packing is pressed, and ensure that the packing is sealed and does not hinder the stem rotation.
