Schneider Electric (Barber Colman) MK-4601 Actuator 30067439-890 It adapts 3/8-inch-24 valve stems

It adapts 3/8-inch-24 valve stems to 1/2-inch-20 actuator stem threads

2 PSI equivalent range

ensuring safe and consistent flame rectification

classic white design and compact 2-1/8" x 3-1/2" footprint make it an ideal choice for high-traffic areas where the main thermostat must be secured or hidden from public access

Simplified Field Service: Pre-formed components allow for faster assembly and maintenance compared to manual field-bending of tubing

Schneider Electric (Barber Colman) MK-4601 Actuator 30067439-890 It adapts 3/8-inch-24 valve stemsThe Schneider Electric MK 4601 (formerly Barber Colman) is a heavy duty pneumatic valve actuator designed for proportional control of valves requiring linear movement. Featuring an 11 square inch effective area diaphragm, this spring return unit operates on a 3 6 psi nominal spring range, providing reliable mechanical positioning in HVAC pneumatic control systems. This model is technically identical to MK 4601 0 0 2 and includes a NEMA 1 enclosure to