LF42
LF42 Pressure Switch
| Model | LF42H | LF42L |
| Medium | Water | Water |
| Pressure set range | Cut-off pressure: 2.5bar±0.5bar | Cut-in pressure: ≤0.1bar |
| Cut-in pressure: 1.5bar ±0.5bar | Cut-off pressure: ≥0.2bar | |
| Proof pressure | 18bar | 18bar |
| Durability | 40,000 cycles | 40,000 cycles |
| Working temperature | 5°C ~ 45°C | 5°C ~ 45°C |
| Switch type | Microswitch – normally closed | Microswitch – normally open |
| Electrical rating | Voltage: 250VAC, Current: 16A | Voltage: 250VAC, Current: 16A |
| Terminal | 4.8 x 0.8 mm blade | 4.8 x 0.8mm blade |
| Connector | 6mm quick connector | 6mm quick connector |
LF42 series pressure switch is used in water supply pressure protection of water inlet. This series includes 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 the water inlet is 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 from continuing to work without water which may lead to damage to the circuit. If the pressure of the water inlet returns to the lowest set volume, the pump will work again.