Source: Flojet Corporation The Model 1500-030A, Transfer Valve automatically changes from an empty to a full bag without interrupting syrup flow. Flojet Corporation1500-030A Transfer Valve automatically changes from an empty to a full bag without interrupting syrup flow. It is vacuum-operated, with a snap-action diaphragm. The valve can operate multiple banks of BIB horizontally; a label indicates which BIB is "on-line". The product can be mounted in any position and can be manually operated as well.