Ranco LDK-310000-070 Solenoid Coil Els PW 17895 The blue finish indicates the

The blue finish indicates the Maxitrol spring chart specification for mid-range pressure (5-12" WC)

Does it restrict airflow to the bulb

Which thermostat models are compatible with this cover

it is worth noting that this 20x13 prefilter is compatible with models such as the SST2000-100

Ranco LDK-310000-070 Solenoid Coil Els PW 17895 The blue finish indicates theThe Ranco LDK 310000 070 is a task specific 120V AC solenoid coil designed for precision actuation of 4 way reversing valves in residential and commercial heat pump systems. Engineered as a standard for "Generation 4" Ranco valves, this black color coded coil is fully epoxy encapsulated, providing a moisture resistant barrier that prevents short circuits in high condensation environments. It supports continuous duty operation, drawing 5 Watts at 50 Hz