Schneider Electric (Barber Colman) PNV-144-43 Yellow Spring 3-7 PSI for MK‑2690

The Schneider Electric (Barber Colman) PNV-144-43 Yellow Spring MK-2690 is a pneumatic pressure controller used to control the HVAC system in a given range of 3-7 PSI of air or fluid pressure. It has a color-coded yellow spring system that is adjusted to open or close control circuits at designated pressures, a way to open or close control circuits. It can be used with residential and commercial heating, ventilation, & air conditioning equipment to properly control pressure and improve the stability of operations.