1. Suitable wrenches should be used when operating manual valves. It is strictly prohibited to use large wrenches for small valves and small wrenches for large valves. It is also strictly prohibited to add force rods to the wrench for operation.

2. When operating the valve, stand on the side of the valve handwheel. It is strictly prohibited to operate in the direction of the valve stem to prevent the medium in the pipeline from leaking and spraying out from the valve disc root, which may cause injury.

3. Use a wrench to operate the manual door. Before operation, the wrench and valve handwheel must be securely fastened to prevent slipping and injury. (Especially when standing on a potentially slippery ground)

4. The operation should be carried out with arm strength, and it is strictly prohibited to rely on body weight to prevent the wrench from slipping and falling.

5. When operating valves in acid and alkali pipelines, if there is a possibility of system leakage or direct contact with acid and alkali, labor protection equipment must be worn to prevent acid and alkali injuries, and a dedicated person must be assigned to supervise and take preventive measures.

6. All steam and water sampling valves must be operated manually, and the use of wrenches is strictly prohibited. Gloves should be worn during operation to prevent burns. If there is a leak, fire-resistant clothing should be worn.