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LF55 Series pressure switches are used to control the pressure of compressor in refrigerant system, also available in air or water fluid. This series have quite stable performance with internal micro-switch structure. Standard mounting bracket are provided.
| Rated Amps.(A)\Rated Voltage(V) | 125VAC | 250VAC | 24VDC |
| Full Load | 20A | 10A | 8A |
| Locked Roter | 72A | 72A | 64A |
| Temperature | -20~110℃ |
The LEFOO LF55 Series Refrigeration Pressure Switch is designed for compressor pressure control and protection in refrigeration and HVAC systems. It monitors refrigerant pressure and automatically switches the circuit to help protect equipment from abnormal high or low pressure conditions.
With adjustable pressure settings, reliable micro-switch operation, and multiple pressure range options, the LF55 Series is ideal for OEM refrigeration units, HVAC equipment, cleanroom systems, and building automation applications.
| Model | Range (bar) | Differential (bar) | Factory Setting (bar) | Max Operating Pressure(bar) | |||
| Min | Max | Min | Max | Off | On | ||
| LF5502 | -0.5 | 2 | 0.2 | 0.7 | 1 | 0.5 | 16.5 |
| LF5503 | -0.5 | 3 | 0.35 | 1.5 | 2 | 1 | 16.5 |
| LF5506 | -0.5 | 6 | 0.6 | 4 | 3 | 2 | 16.5 |
| LF5506M | -0.5 | 6 | Reset Differential≤1bar | 3 | Manual Reset | 16.5 | |
| LF5508 | -0.2 | 7.5 | 0.7 | 4 | 3 | 2 | 20 |
| LF5510 | 1 | 10 | 1 | 3 | 6 | 5 | 16.5 |
| LF5514 | 2 | 14 | 1 | 4 | 10 | 8 | 20 |
| LF5516 | 3 | 16 | 1 | 4 | 10 | 8 | 35 |
| LF5520 | 5 | 20 | 2 | 5 | 16 | 13 | 35 |
| LF5530 | 8 | 30 | Fixed 3 to 5bar | 20 | 15~17 | 35 | |
| LF5530M | 8 | 30 | Reset Differential≤4bar | 20 | Manual Reset | 35 | |
| LF5530D | 5 | 30 | 3 | 10 | 20 | 15 | 35 |
| LF5532 | 8 | 32 | 2 | 6 | 20 | 17 | 35 |
| LF5542 | 8 | 42 | 4 | 10 | 30 | 25 | 46.5 |
Conversion: 1kgf/cm²=14.2psi 1psi=68.95mbar
It is used to control compressor pressure in refrigeration systems and can also be used with air or water fluid applications.
The LF55 series includes models with ranges up to 42 bar, depending on the selected model.
Yes. Models such as LF5506M and LF5530M include manual reset options.
The listed temperature range is -20°C to 110°C.
Yes. The LF55 product page provides PDF documents for viewing and download.
Choose according to pressure range, differential, factory setting, maximum operating pressure, and reset type. For confirmation, contact LEFOO sales or engineering support.
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