The unit is rated for a 680 PSI maximum working pressure

and the McDonnell & Miller 310802 Snap Switch is the standard for maintaining seasonal uptime

This kit typically includes the piston/poppet assembly

While it operates within a standard 0-20 psi range

Avoid mounting with the sample line connections facing upward to prevent moisture accumulation

Schneider Electric (Barber Colman) ADDA-104-2 Plunger Els PW 17895 The unit is rated forThe Schneider Electric (Barber Colman) ADDA 104 2 Plunger is a precision engineered 150 lb. plunger assembly specifically designed for seamless integration with AV 29 series valve linkages. As a veteran HVACR technician, you know that maintaining the integrity of Barber Colman gear train actuators requires OEM spec components to ensure accurate stroke transition and long term reliability. This 150# plunger assembly is critical for field installing