Vacuum Transmitting Valve (VTV)
Blow air through each side of valve. Air should pass freely from side "B" to side "A" (Black to Brown), but air should pass with difficulty from side "A" to "B" (Brown to Black). See Fig 1.
Blow air through each side of valve. Air should pass freely from side "B" to side "A" (Black to Brown), but air should pass with difficulty from side "A" to "B" (Brown to Black). See Fig 1.