5. Regularly check the air source and power supply The air source is one of the key energy sources for driving the regulating valve. Although the membrane cavity of the pneumatic control valve does not consume air, if the air supply system contains impurities such as water and oil, the valve positioner and relay may be blocked and fail. Therefore, the air source and power supply must be checked regularly to ensure that the air source is clean and dry and the power supply is reliable.

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