Honeywell L404F1243 pressuretrol 2-50psi

Honeywell Pressure Switch L404F1243 (Pressuretrol® Controller) Automatic control of working pressure 2-50 psi for steam boilers, compressors and hydraulic systems. Honeywell Pressure Switch L404F1243 (Pressuretrol® Controller) is a professional electropneumatic switch designed for automatic control and emergency protection of systems with overpressure. The device is widely used in steam boilers, air compressors, pumping stations and other industrial equipment to maintain working pressure and shut down when permissible limits are exceeded. Model L404F1243 has a setting range of 2-50 psi (0.14–3.5 bar), adjustable differential 6-14 psi (0.4–0.96 bar) and operates on pressure rise (contacts R-W close, R-B open). Equipped with a contactless (mercury-free) snap-acting microswitch, ensuring high reliability and compliance with modern environmental standards. If your boiler or compressor does not build pressure, does not shut off when the upper threshold is reached, or conversely does not start when pressure drops below the set point, the cause may be a malfunction or misadjustment of this switch. Technical specifications: Parameter Value Part numbers L404F1243, L404F1243/U, 534.676.033 Manufacturer Honeywell (USA) Type Pressuretrol® Controller — pressure switch with automatic reset Setting range (working) 2 – 50 psi (0.14 – 3.45 bar / 14 – 345 kPa) Setting range (some versions) 5 – 50 psi (0.34 – 3.45 bar) Maximum working pressure (continuous) 25 psi (1.72 bar) Maximum withstand pressure (peak) 300 psi (20.7 bar) Differential (adjustable) 6 – 14 psi (0.41 – 0.96 bar) — subtractive type Contact type SPDT (single-pole double-throw)