1. Before the maintenance or assembly of the American standard gate valve, it is necessary to relieve the pressure exerted by the pipeline on the valve body and keep the gate valve in an open state;

2. Before the maintenance and assembly of the American standard gate valve, the gas source or power supply needs to be disconnected;

3. Before maintenance, disengage the actuator and the bracket;

4. It is necessary to check that the upstream and downstream pipelines of the gate valve have been relieved of pressure before disassembling and disassembling;

5. Be careful when disassembling the American standard gate valve and installing it after the maintenance is completed, so as not to damage the internal sealing surface. If it is a non-metallic part, the tool to be used when removing the sealing ring.

6. The performance of the detergent for cleaning the valve should not have harmful chemical reactions and are not mutually exclusive with the various parts and media of the valve.

7. Check that the packing part is required to be pressed tightly, not only to ensure the sealing of the packing, but also to ensure the flexible opening of the gate; before installing the valve, the user must check the valve model, connection size and pay attention to the flow direction of the medium to ensure consistency with the valve requirements.