Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator R-410A This valve is the standard

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The BASO L62GB-3 Switch is a heavyweight industrial pilot safety switch engineered for standing pilot systems in commercial space heating and industrial processing equipment

Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator R-410A This valve is the standardThe 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