Schneider Electric (Barber Colman) MK-6821 Proportional Control 30067439-890 making it a standard replacement

making it a standard replacement in commercial cooking equipment

This valve is typically rated for MOPD (Maximum Operating Pressure Differential) ranges consistent with the S20 series

the "PB" suffix denotes the standard plastic box enclosure

this NTC thermistor triggers a safety shutdown to protect the heat exchanger and venting materials from thermal stress

Can this trap handle superheated steam

Schneider Electric (Barber Colman) MK-6821 Proportional Control 30067439-890 making it a standard replacementThe Schneider Electric (Barber Colman) MK 6821 Proportional Control is a rugged 50 square inch pneumatic valve actuator engineered for precise linear movement in commercial HVAC systems. This spring return actuator operates on a 8 13 PSI pneumatic signal range, providing reliable fail safe positioning during pressure loss. Encased in a durable Nema 1 enclosure, it features a 1 8" NPT air connection and a 1" nominal stroke, making it a standard choice