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What causes the original harness to fail
Visual inspection often reveals bending or significant scoring on the BDHE-136 pin surface
For multi-stage or high-altitude applications
the switch typically requires replacement
Schneider Electric (Barber Colman) AV-401 Linkage Kit What causes the original harnessThe Schneider Electric AV 401 Linkage kit is engineered for field mounting MK 4600 series pneumatic actuators onto VB 7000 and VB 9000 series valve bodies. Providing a precise mechanical interface, this Barber Colman linkage ensures stable stroke transmission and reliable valve modulation in pneumatic control systems. The heavy duty construction is designed to withstand the high cycle demands of HVAC applications, accommodating VB 7xxx valves in sizes
