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(1) Standards for a functional control valve: 1. The components or accessories are in good condition； 2. The nameplate is clear and error-free; the instrument tag is properly attached ； 3. Fasteners are not loose, and the air supply pipe is securely fixed ； 4. No leaks in the filler, valve body, connection flanges, or air supply ； 5. The wiring terminals are firm and reliable, the cables are well-sealed, and there is no rust inside the junction box ； 6. The handwheel mechanism, manual components, and moving parts are flexible; the handwheel and manual components are in the automatic position ； 7. The equipment itself is clean, free of rust, and the labels are intact and not expired ； 8. The air source pressure meets the requirements specified on the nameplate ； 9. The valve performance meets the specified performance criteria and satisfies the process requirements. (II) Standards for intact instruments: 1. Parts or accessories are in good condition ； 2. The nameplate is clear and error-free; the instrument tag is properly attached ； 3. Fasteners are not loose ； The table body, pressure transfer pipes, and protection box are firmly fixed ； 4. No leaks at the table body, pressure transfer pipes, and other sealing areas ； 5. The wiring terminals are firm and reliable, the cables are well-sealed, and there is no rust inside the junction box ； 6. The equipment itself is clean, free of rust, and the labels are intact and not expired ； 7. Explosion-proof instruments meet the relevant technical requirements. 8. The insulation and heating systems are in good condition; there is no exposed area or abnormal steam leakage ； 9. The performance of the instruments meets the specified performance criteria and satisfies the process requirements ； 10. The calibration gas (standard solution) or other reagents for the analytical instruments are normal.