Honeywell L404F1227 pressuretrol

Honeywell L404F1227 Pressure Switch (Pressuretrol® Controller) Reliable overpressure control for steam, air and gases for professional systems. The Honeywell L404F1227 pressure switch (Pressuretrol® Controller) is an electro-pneumatic switch designed for overpressure control in steam heating systems, compressed air and non-combustible gases. The device provides both operating control (on/off) and safety protection, shutting down equipment when permissible limits are exceeded. Model L404F1227 has a setting range of 10–150 psi (0.7–10.3 bar), adjustable differential 10–22 psi (0.6–1.5 bar) and switches on rising pressure (contacts R-W close). If your compressor, steam boiler or pumping station does not shut off when the upper limit is reached, does not start when pressure drops, or operates intermittently, the cause may be a faulty or misadjusted switch. Technical specifications: Parameter Value; Part numbers L404F1227, L404F1227/U, 534.676.030; Manufacturer Honeywell (USA); Type Pressuretrol® Controller – automatic reset pressure switch; Controlled medium Steam, air, non-combustible gases, liquids non-aggressive to the sensing element; Setting range (operating) 10 – 150 psi (69 – 1034 kPa / 0.69 – 10.34 bar); Maximum working pressure 225 psi (15.5 bar) – continuous; Maximum withstand pressure 300 psi (20.7 bar) – peak; Differential (adjustable) 10 – 22 psi (69 – 152 kPa / 0.6 – 1.5 bar) – subtractive type; Switch-on point Adjustable via main screw; Switch-off point = switch-on point + differential (subtractive type); Contact type SPDT (single-pole double-throw) with snap-acting; Contact action Closes R-W / opens