1, hand wheel, handle and drive mechanism for lifting are not allowed to use, and forbid the collision.
2, Gate Valve should be mounted vertically (ie valve stem in a vertical position, the hand wheel at the top).
3, with a bypass valve to open the valve in the bypass valve open preceded by (in order to balance imports and exports and reduce the pressure opening force). 4, belt drive mechanism of the valve, according to the provisions of product installation instructions.
5, if the valve often switch to use, lubrication at least once a month