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

This valve is the standard NG gas valve replacement for many Williams wall heaters requiring a 1/2" connection

OEM Compatibility: Designed specifically for Reznor heating units to ensure a perfect match for mounting and electrical specifications

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

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 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