Periodic cleaning may be performed. A petrochemical solvent is recommended to clean (wash and brush) the valve. High-pressure power washing is not recommended. When cleaning the metering element and the inside of the valve body, do not use sharp objects that may scrape or dent the metering element, as this could degrade the accuracy of the valve. A cotton swab or similar soft tool is recommended in combination with the solvent to mechanically remove contaminants that are adhered to the valve internals.

For more details see attached procedure, Application Note 51342