Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator 30067439-890 especially in high-demand steam and

especially in high-demand steam and hot water applications

The 804111703 is a manual reset model

contractors can ensure optimal manifold pressure and thermal efficiency

System Longevity: Prevents excessive heat buildup

these are designed for direct installation

Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator 30067439-890 especially in high-demand steam andThe 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