1. The valve has been tested for strength and sealing before leaving the factory. When using, all the joints should be kept in the initial state.
2. The handwheel of this series of valves is marked with opening and closing rotation direction, and the upper part of the open and closing lever is equipped with opening and closing height scale for adjustment indication.
3. When the valve is welded to the pipeline, the valve should be opened and the neck should be protected with damp material to minimize high temperature heat conduction to prevent damage to the sealing filler.
4. When closing the valve, it is forbidden to use the afterforce lever. When the gate is closed to the top, the handwheel should turn 1/2 turn to make the gate in the floating state.
5. During the use of the valve, a certain amount of grease should be injected into the bonnet grease joint regularly.
6. If the valve leaks due to wearing parts during use, it should be replaced in time.
7. During the maintenance of the valve, the inner cavity should be cleaned and the transmission parts should be lubricated during assembly.
8. When the valve is in storage and out of service, the gate shall be in the closed position, and shall be placed in a ventilated and dry place for long-term storage, and shall be inspected and maintained regularly.