Condor CW210000AV Unloader Valve for MDR 21U and MDR 11

The Condor CW210000AV Unloader Valve Kit is a factory OEM replacement part that restores the unloading function for MDR21U and MDR11 pressure switches. It is marketed as the unloader valve kit for MDR21U & MDR11, aligning with Condor part numbers 1.3981.0000 and 247593 and Campbell Hausfeld part numbers CW210000AV and CW210001AV. The kit weighs approximately 0.1875 lb (about 85 g) and is designed for use with MDR21U and MDR11 switches in compatible Condor Campbell Hausfeld systems to vent the discharge line when the switch cuts out, enabling the next compression cycle. As an authentic Condor replacement, it supports original performance within the MDR-series control assemblies and is suited for service or repair of compressors that rely on MDR 21U or MDR 11 switches.