Barber Colman Valve Linkage Extension Kit

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 recommended for cooling 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. Features AV-601 provides thermal insulation between valve and actuator