The Reznor 123974 Fan Switch is a precise thermal control engineered for gas-fired unit heaters and duct furnaces

this kit is engineered to withstand the thermal cycling and pressure fluctuations common in HVACR and steam applications

Rugged Construction: Built with a durable metal housing and a sensitive internal diaphragm for long-term reliability in demanding commercial environments

It is rated for a maximum fluid pressure of 290 psig and maintains performance across fluid temperatures from -20°F to 250°F

This kit is engineered for seamless integration with Belimo AF/NF series actuators

Schneider Electric (Barber Colman) MK-3141 Pneumatic Damper Actuator Els PW 17895 The Reznor 123974 Fan SwitchWhen the job requires a drop in Schneider Electric (Barber Colman) MK 3141 Pneumatic Damper Actuator, tech reliability is the only metric that matters. This proportional linear actuator is the direct replacement for the legacy MK 3140, engineered for modulating control of HVAC dampers and mixing boxes. Featuring a rugged die cast aluminum housing and a beaded molded neoprene rolling diaphragm, it manages a 3 to 13 psi spring range with a field