air compressor pressure switch, pressure switches

WHAT IS A PRESSURE SWITCH?

A pressure switch is a device that senses changes in fluid pressure and responds in a specified way. An actuated pressure switch makes or disrupts electrical contact in order to either trigger an alarm or switch something on or off. Switches are programmed to activate at certain pressure points, and may be designed to make contact either on pressure rise or on pressure fall.

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Curtis CA Series air compressors with adjustable pressure switch.

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PRESSURE SWITCHES FOR AIR COMPRESSORS

Square D by Schneider Electric 9013FHG42J59X Air-Compressor Pressure Switch, 175 psi Set Off, 40 psi Fixed Differential, 1/4" NPSF Internal, 2-Way Release Valve

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 Pressure switches consist of a switch mechanism that is connected to a bellow or diaphragm that reacts to system pressure. They are selected by operating range and differential. Operating range is the pressure limits in which the switch will work. Differential is the difference between the cut-in and cut-out pressures. Pressure switch settings, common to many air compressors, are set for a range of 40 to 250 PSI and an adjustable differential of 35 to 60 PSI. This means that the lowest pressure that the switch can be set to close at is 40 PSI, and the highest pressure it can be set to open at is 250 PSI. The differential that is actually available to use varies with the pressure range you’re actually working in.

				1 Phase		3 Phase
Model Number	Min. Close	Max. Open	Differential Range	120 V	240 V	240 V	480/600 V	Factory
	Cut-In	Cut-Out						Setting
69JF6LY	60 psi	110 psi	15 - 25 psi	1 1/2	2	3	N/A	80 - 100
69JF7	50 psi	145 psi	25 - 33 psi	1 1/2	2	3	N/A	95 - 125
69JF7Y	50 psi	145 psi	25 - 33 psi	1 1/2	2	3	N/A	95 - 125
69JF7LY	50 psi	145 psi	25 - 33 psi	1 1/2	2	3	N/A	95 - 125
69JF7LY2C	50 psi	145 psi	25 - 33 psi	1 1/2	2	3	N/A	95 - 125
69JF8	90 psi	165 psi	25 - 38 psi	1 1/2	2	3	N/A	115 - 150
69JF8Y	90 psi	165 psi	25 - 38 psi	1 1/2	2	3	N/A	115 - 150
69JF8LY	90 psi	165 psi	25 - 38 psi	1 1/2	2	3	N/A	115 - 150
69JF8LY2C	90 psi	165 psi	25 - 38 psi	1 1/2	2	3	N/A	115 - 150
69JG6LY	60 psi	110 psi	15 - 25 psi	2	3	5	1	80 - 100
69JG7Y	50 psi	145 psi	25 - 33 psi	2	3	5	1	95 - 125
69JG7LY	50 psi	145 psi	25 - 33 psi	2	3	5	1	95 - 125
69JG7LY2C	50 psi	145 psi	25 - 33 psi	2	3	5	1	95 - 125
69JG8	90 psi	165 psi	25 - 38 psi	2	3	5	1	115 - 150
69JG8Y	90 psi	165 psi	25 - 38 psi	2	3	5	1	115 - 150
69JG8LY	90 psi	165 psi	25 - 38 psi	2	3	5	1	115 - 150
69JG8LY2C	90 psi	165 psi	25 - 38 psi	2	3	5	1	115 - 150
69JF9Y	100 psi	175 psi	30 - 40 psi	1 1/2	2	3	N/A	140 - 175
69JF9LY	100 psi	175 psi	30 - 40 psi	1 1/2	2	3	N/A	140 - 175
69JF9LY2C	100 psi	175 psi	30 - 40 psi	1 1/2	2	3	N/A	140 - 175
69JG9	100 psi	175 psi	30 - 40 psi	2	3	5	1	140 - 175
69JG9Y	100 psi	175 psi	30 - 40 psi	2	3	5	1	140 - 175
69JG9LY2C	100 psi	175 psi	30 - 40 psi	2	3	5	1	140 - 175

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The 69J is the most adaptable switch on the market, the and offers the user the flexibility to build the pressure switch around the compressor - not the other way around. The unloader can be mounted on the front or either side, and can be rotated to any of eight different positions allowing for quicker assembly and shorter tubing. Bottom cable entry is also available with unique built-in clamping strain relief for even quicker assembly.

Square D by Schneider Electric 9013FHG59J59M1X Air-Compressor Pressure Switch, 175 psi Set Off, 40 psi Fixed Differential, 1/4" NPT External, 2-Way Release Valve, Auto/Off Cut-Out Lever 

 Square D by Schneider Electric 9013FHG52J59X Air-Compressor Pressure Switch, 175 psi Set Off, 40 psi Fixed Differential, 1/4" NPSF Internal, 2-Way Release Valve

Square D by Schneider Electric 9013FSG52J33P Air-Pump Pressure Switch, NEMA 1, 50-70 psi Pressure Setting, 25-80 psi Cut-Out, 20-30 psi Adjustable Differential, Pulsation Plug

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 Square D by Schneider Electric 9013FHG52J59M1 Air-Compressor Pressure Switch, 175 psi Set Off, 40 psi Fixed Differential, 1/4" NPSF Internal, Auto/Off Cut-Out Lever

 214-428-2868

 HERE IS ONE OF THE MOST POPULAR PRESSURE SWITCHES ON THE MARKET.

FURNAS HUBBELL
PRESSURE SWITCH

Furnas Hubbell Part#: 69JF7LY

FURNAS HUBBELL PRESSURE SWITCH W/ UNLOADER VALVE AND ON/OFF LEVER.

Features:

·        3 and 5 HP 200 PSI maximum

·        Improved unloader valve design

·        Several terminal options

·        Optional bottom cable entry

·        Various pipe locations

·        Swivel unloader valve

Specs:

·        Cut-In PSI: 95

Cut-Out PSI: 125

PSI Open/Close: 95/125 psi

Differential: 30 to 40 psi

Size: 1/4″

Connection Type: Female NPT