3-667 PSI Heavy Duty Air Compressor Pressure Control Switch

Egret Encapsulated Pressure Control Switches are compact, economical, direct-mount, snap-action, On/Off pressure controls, available in a wide variety of factory-calibrated, non-adjustable pressure set points.

• Low pressure switch – open on pressure drop, closes on pressure rise
• High pressure switch – open on pressure rise, closes on pressure drop

High-Pressure Switch
An auto-reset high-pressure switch (single pole, single throw) is located on the liquid line. The switch shuts off the compressor if the discharge pressure rises above the factory setting. The switch is normally closed and is permanently adjusted to trip (open) at a factory-preset maximum high-pressure point. The switch resets (closes) when the pressure drops below a factory-preset minimum low-pressure point.
Low-Pressure Switch
Some heat pumps may have a low-charge switch that functions if there is a potentially damaging loss of refrigerant. The switch is a pressure switch located on the discharge line of the compressor. The switch opens on low-pressure drop in the discharge line to shut off the compressor. The switch opens and closes at preset pressure points.