HERZ Adjusting Key

HERZ Adjusting Key is designed for precise adjustment and easy operation of HERZ valves and controllers. It is compatible with HERZ Flow Controller 4001, Differential Pressure Controller 4002 (used from 2009), Combi Valve 4006, and Control Valve 7217 V. Built for durability and ease of use, it ensures accurate valve setting, smooth handling, and reliable performance in HVAC and industrial applications. Ideal for maintenance and system balancing, it helps improve efficiency and control.