27 Jul BARBER COLEMAN AV-601 Valve Linkage Extension for AV-600
The AV-601 linkage extension is required for all heating valves with MF-5X13, MP-541X, MP-551X, MPR-561X, MPR-571X, and MPR-581X actuators. It is also used for higher ambient and fluid temperatures with MA-521X or MP-521X actuators....