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Lefoo Water Pressure Switch LF42H

LF42 series pressure switch is used in water supply pressure protection of water inlet. This series water pressure switch include two models LF42H(high-pressure protection) and LF42L(low pressure


LF42H is the high pressure protection switch model. If the pressure of the pressure vessel transferred reaches the setting value while the vessel is full flled 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 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 damage to the circuit. If the pressure of the water inlet returns to the lowest set volume, the pump will work again.

Specification of Water Pressure Switch LF42H

Pressure set rangecut off pressure:2.5bar+0.5barcut in pressure:≤0.1bar
cut in pressure: 1.5bar+0.5barcut off pressure: 20.2bar
Proof pressure1 8bar1 8bar
Durability> 40,000 times> 40,000 times
Working temperature5-45C5-45°C
Switch typeMicroswitch, nomal closeMicroswitch, nomal open
Electrical ratingVoltage:250V AC Current:16AVoltage:250V AC Current:16A
Terminal4.8*0.8 mm blade4.8*0.8mm blade
Connector6mm quick connector6mm quick connector

LEFOO Specification of Water Pressure Switch LF42H

Features of LEFOO Pressure Switches LF42H

Robust and compact structure.

BPA free food level plactic made.

Precise pressure control and durable working span.

Application of LEFOO Water Pressure Switches

LF40H water pressure switch for pumps is a device that can automatically control the electric connection of the pump, which can prevent dry-running damage to the pump.

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