Johnson Controls A19ADB-25 Utility Thermostat 30067439-890 provided the actuator itself is

provided the actuator itself is housed in a NEMA-rated enclosure

The Schneider Electric (Barber Colman) N800-9426 Diaphragm is a critical replacement component for maintaining pneumatic system integrity

crumbling edges

which is converted into critical data for the VAV controller

Contractor-Grade Fit: Engineered for quick installation with a secure locking collar to prevent shaft slippage and wear

Johnson Controls A19ADB-25 Utility Thermostat 30067439-890 provided the actuator itself isJohnson Controls A19ADB 25 Utility Thermostat, 120 208 240 Vac, 65 300 Degree Temperature Range, 6' Capillary Length, Open Hi, Remote Bulb, Manual Reset, Screwdriver Setpoint Adjustment A19ADB 25 is identical to A19ADB 25C