LF52
LF52 Differential Pressure switch
| 1. Media: Non-hazardous media such as water, air, oil, etc… | ||||
| 2. Contact arrangement: SPDT (micro switch) | ||||
| 3. Electrical rating: 3A, 250VAC | ||||
| 4. Working pressure | ||||
| Adjustable | Model | Differential pressure adjustable range kPa | Differential | Lap increment |
| Single Set Point Working Pressure range | 52-15 | 5~15 | 1~3 | 1 |
| 52-30 | 5~30 | 1~3 | 2.2 | |
| 52-70 | 6~70 | 3~5 | 5.5 | |
| 52-100 | 6~100 | 3~5 | 6.5 | |
| 52-200 | 10~200 | 5~7 | 16 | |
| 52-300 | 20~300 | 6~9 | 25 | |
| 52-400 | 30~400 | 6~12 | 38 | |
| Dual Set Point Working Pressure range | 52-30/100 | 5~30 / 6~100 | 1~3 / 3~5 | 2.2 / 6.5 |
| 52-70/100 | 6~70 / 6~100 | 3~5 / 3~5 | 5.5 / 6.5 | |
| 52-100/100 | 6~100 / 6~100 | 3~5 / 3~5 | 6.5 / 6.5 | |
| 52-100/200 | 6~100 / 10~200 | 3~5 / 5~7 | 6.5 / 16 | |
| 52-200/200 | 10~200 / 10~200 | 5~7 / 5~7 | 16 / 16 | |
| 52-300/300 | 20~300 / 20~300 | 6~9 / 6~9 | 25 / 25 | |
| 52-400/400 | 30~400 / 30~400 | 6~12 / 6~12 | 38 / 38 | |
| 5. Storage temperature: -29°C – 82°C | ||||
| 6. Ambient temperature: -20°C – 71°C | ||||
| 7. Media temperature: -20°C – 93°C | ||||
| 8. High and low-pressure connections: 7/16″ Single set point, Male thread. 7/16″UNF Double set point, Male thread. G1/4 Single set point, Female thread. G1/4 Double set point, Female thread | ||||
| 9. Maximum static pressure: 16bar | ||||
| 10. Maximum differential: 10bar | ||||
| 11. Setting repeatability tolerance: ±1% | ||||
| 12. Protection Grade: IP54 | ||||
| 13. Electrical endurance: 30000 cycles | ||||
| 14. Mechanical endurance: 100000 cycles | ||||
| 15. Contact resistance:≤100mΩ | ||||
| 16. Insulation resistance: ≥10MΩ | ||||
| 17. Dielectrical property: No breakdown and flashover under 1200V for one minute. | ||||
| 18. Material: Outlet hole, low-pressure side, high-pressure side, pressure adjusting screw | ||||
This adjustable differential pressure switch, LF52, is developed for limited use in different differential value requirements. It is widely applied for detecting the differential of water filters, pumps, heat exchangers, chillers, and its coil units.
When the water flow (differential) decreases or increases from the setting point, there will be an alarm or cut-off output signal for the self-controlling system. It’s also available for indicating the status of a pump or water filter.
Double differential settings pressure switches can take the place of vane flow switches and avoid changing the vane flow switch from chillers each year.
Reference standard
1. UL508
2. GB14048-2000 ( Low voltage switchgear and control equipment general provision )
3. GB14048.5-2000 (Low voltage switchgear and control equipment, part 5-1 Control equipment and switching elements )
4. ROHS certificate.