Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator R-410A The Maxon 42430 acts as

The Maxon 42430 acts as the primary interface for air and fuel integration

This SJ-328-36 direct acting thermostat operates with an open high contact configuration

Electronic Precision: Provides a minimum differential as low as 5 psi with an accuracy of ±1

Compact Profile: The 3 cubic inch capacity is ideal for tight installations in reach-ins and small split systems

encapsulated design often used in watertight or explosion-proof applications

Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator R-410A The Maxon 42430 acts asThe Schneider Electric MK 4821 is a professional grade pneumatic valve actuator designed for the precise positioning of 1 1 2" to 2" VB 9XXX series globe valves in commercial HVACR systems. Built for the rigors of mechanical rooms, this actuator features a rugged die cast aluminum housing and an 11 sq. in. effective diaphragm area. It operates on a proportional pneumatic signal with a nominal 8 to 13 psi spring range, ensuring reliable spring return