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LEFOO · PRESSURE CONTROL

LEFOO LF08A High-Current Mechanical Pressure Switch

LEFOO LF08A — official manufacturer product photograph
LEFOO LF08A · Manufacturer photograph and original specification

LEFOO manufacturer / Pressure Switches

LEFOO LF08A High-Current Mechanical Pressure Switch is a manufacturer-defined switch family, with a distinct switching mechanism and selection envelope. This AirAlign entry explains electrical, pressure and safety caveats so that the maker’s headline specification is not mistaken for a universally approved configuration.

Model data and engineering selection

FunctionFactory-calibrated, fixed-setpoint automatic-reset mechanical pressure switch, selectable SPST normally open/closed or SPDT
Setpoint and toleranceMaker product table lists 0.2–6 bar ±0.5 bar; 6–10 bar ±0.7 bar; 11–20 bar ±1 bar; 21–45 bar ±1.5 bar
Distinct safety limitMaker pressure table lists 15 / 35 / 45 bar proof limits by range and a separate 5,000 psi burst figure; do not confuse proof/burst pressure with the switch setpoint
Contact/load selectionHigh-current AC 120 V 13 FLA / 65 LRA, 240 V 10 FLA / 45 LRA, 480 V 4 FLA / 24 LRA manufacturer listed; DC contact loading requires its own option
Medium and temperatureMaker describes air, water, oils and refrigerants; environment −30…+65°C low pressure vs −35…+120°C higher pressure, medium −50…+120°C
Process and electrical fittingsSelected NPT, R, G, UNF and copper tube; blade terminals or factory leads; pressure-seal compatibility mandatory
Selection insightUse where contact load and factory setpoint fit. A digital transmitter or LF08V vacuum switch is not a like-for-like replacement.

When to specify this model

Confirm the switching setpoint, hysteresis, wetted seals, maximum continuous pressure, proof/burst rating, electrical contact type and inductive load, compatible port/thread, electrical ingress protection and ambient-medium temperature separately. A switch supplies an on/off signal; it is not a substitute for a 4–20mA or RS485 transmitter. Check the exact manufacturer suffix and revision against the application.

Original manufacturer evidence

Official LEFOO LF08A model and specifications

Related Pages

LEFOO manufacturer profile · Pressure Switches

LF08A — high contact current is not motor protection

LF08A’s high-current description makes contact ratings particularly important, but switching capability must be compared with motor inrush and actual electrical utilization category, not a headline resistive amperage alone. Determine whether a separate rated contactor/overload is required. Check setpoint, allowable proof pressure and the mechanical diaphragm/media materials before using the switch in a compressor or pump protection circuit.