Low Pressure Cutout Switch Definition

The low water pressure switch attachment drops to turn off the pump when it loses its prime and the pressure drops to a specific low pressure cut off point.

Low pressure cutout switch definition.

The switch arm can be pressed and the cut out reset after the cause of the over pressure has been found and rectified. Mounted on low pressure side of compressor. Low pressure cutoff switch technical details pressure range 20 to 65 psi. Low pressure switch lps installs on the inlet side of the booster pump and will shut off the pump if the feed water is interrupted.

An automotive air conditioner s pressure switch cycles the vehicle s compressor on and off when the refrigerant pressure falls below an acceptable level. To control box temperature with a low pressure control the system must use a thermostatic expansion valve non bleed type. By cycling the compressor in response to the suction low side pressure box temperature can be controlled. The low pressure shut off switches are available with low pressure cut off point of approximately 8 to 10 lbs.

Switch remains closed at 5 psi or more when pressure drops below 5 psi switch will open and cut off the power to the pump. Refrigerant does not wear out or evaporate. Allows compressor to resume when pressure rises above set point. Only leaking air conditioning systems have low refrigerant levels.

Mounted on high pressure side of compressor. Low pressure cut out to protect the compressor against low pressure in the system and to avoid the ingress of air into the system if a vacuum is generated in the lines a low pressure cut out is provided. This type of control is most popular in small refrigerated boxes such as beer coolers. Requires wire harness 21 028 sold separately.