LF42 series pressure switch is used in water supply pressure protection of water inlet. These series include two models LF42H (high-pressure protection) and LF42L (low-pressure protection).
LF42H is the high-pressure protection switch model. If the pressure of the pressure vessel transferred reaches the setting value while the vessel is fully filled with water, the switch will cut off the circuit to make the pump stop. So the pump will not be damaged.
LF42L is the low-pressure protection switch. If the pressure of water inlet lower than the set value, RO will not work and keep dewatering, then the switch will cut off the circuit to make the pump stop. It can prevent the booster pump still working without water which may lead to the damage of the circuit. If the pressure of the water inlet returns to the lowest set volume, the pump will work again.
Specification
| Model | LF42H | LF42L |
| Medium | water | water |
| Pressure set range | cut off pressure:2.5bar±0.5bar | cut in pressure: ≤0.1bar |
| Proof pressure | 18bar | 18bar |
| Durability | 40,000 times | 40,000 times |
| Working temperature | 5°C-45°C | 5°C-45°C |
| Switch type | Microswitch , nomal close | Microswitch , nomal open |
| Electrical rating | Voltage:250V AC Current:16A | Voltage:250V AC Current:16A |
| Terminal | 4.8*0.8 mm blade | 4.8*0.8mm blade |
| Connector | 6mm quick connector | 6mm quick connector |
