Johnson Controls A-4000-138 Station 30067439-890 this non-adjustable safety thermostat features

this non-adjustable safety thermostat features a fixed 450°F trip point

ventilation sequences

Enhanced Thermal Integrity: High-grade winding insulation prevents electrical breakdown under the high-load conditions typical of industrial HVAC systems

What are the primary electrical requirements

facilitating rapid millivolt signal generation to the safety shutoff valve

Johnson Controls A-4000-138 Station 30067439-890 this non-adjustable safety thermostat featuresThe Johnson Controls A 4000 138 is a professional grade remote mounted pressure reducing station engineered to maintain precise pneumatic control system performance. This unit effectively regulates output pressure within a tight 0. 02 psi tolerance, even when managing input pressure variations of up to 20 psi. Designed for rigorous HVACR environments, it handles a maximum input pressure limit of 300 psig and provides a reliable air flow capacity of 25