The FILTER BALL VALVE which can come supplied and fitted to an auto drain valve or obtained separately, comprises a manual isolation valve and fine mesh filter/strainer. FBV units are designed to be fitted to the inlet port of the drain valve.
The fine mesh stainless steel filter/strainer is designed to prevent contaminants from reaching the solenoid valve and can be easily removed for periodic cleaning.
The isolation valve can be used to isolate the air/condensate supply from the drain valve and facilitate inspection and maintenance. (See Figure)