Description
The Schneider Electric (Barber Colman) PNV-145-48 Blue Spring is a replacement element in pneumatic valve actuator assemblies to set the control pressure range. The 813 PSI rating defines the pneumatic signal band that determines actuator movement response, while the blue color coding identifies the specific calibration range for consistent valve positioning. It is typically fitted inside MK-2690 actuator systems to maintain balanced air pressure control during modulation of valve operation. Within HVAC systems, it is used in pneumatic control setups for valves in air handling and hydronic equipment, supporting controlled airflow or water flow regulation
