The QCY features a built-in air valve, which automatically cuts off the compressed air flow (or vacuum) before the system is completely disengaged.
The opening of the compressed air flow (or vacuum) is also automatic and follows the complete engagement.
Therefore, unlike the QCX, a single handle is sufficient. This reduces the dimensions of the QCY which is interchangeable with the QC…-A and compatible with the QC…-B.
This valve, too, is with rotating tap and therefore does not require a high pushing force for engagement and does not cause uncontrolled movements during disengagement. A venting circuit puts the pneumatic tools onboard the QC...-B in contact with the atmosphere before the disengagement is completed.