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.

 

 

 

Curtis CA Series air compressors with adjustable pressure switch.

 

 

 

 

 

 

 

WWW.HKAIRCOMPRESSORS.COM

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

 

 

 

WWW.HKAIRCOMPRESSORS.COM

 

 

 

 

 

 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

 

www.hkaircompressors.com

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

 

 

www.hkaircompressors.com

 

 

 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rotary Screw compressor oil change, changing the oil in a rotary screw air compressor

CURTIS ROTARY SCREW AIR COMPRESSORS

Why Should You Service The Oil In Your Rotary Screw Air Compressor?

Every manufacture in the world of rotary screw compressors will have specific guidelines and maintenance schedules for your rotary screw air compressor.  Please follow these guidelines as it will save you a great deal of money in the long run.  Rotary Screw Air Compressors are not cheap; consequently you should always put the right oil (and the correct amount) into the machine as prescribed by the manufacturer.  If you have any questions, you can always visit FSCURTIS at: www.fscurtis.com and download the brochures and technical data for your machine. 

 

When do you change the oil?

A critical factor to the life expectancy/ longevity is compressor run time.  Most of the manufacturers will tell you that the rotary screw air compressor is designed to run 24/7 365 days a year but in reality they run anywhere from 5-8 hours per day.  If you do the math:

 

There are 8,760 hours in one year

 

Operating your machine 8 hours per day =2,920 hours.

 

Operating your machine 6 hours per day =2,190 hours.

Important to note, basic service and maintenance items need to be performed in order to keep your warranty and keep the compressor in good shape.  Your maintenance book will give you the required intervals along with the necessary tasks that need to be performed at specific run time.  The preventative maintenance programs are designed for standard conditions, but most compressors are typically installed in dirty or dusty environments.

Here are the factors to consider to properly maintain your rotary screw air compressor to ensure a long, long life....

 

1)   The Environment

If your compressor is running in a dirty environment where you have to keep cleaning the coolers externally to keep the compressor cool and the air filter is continually dirty when you inspect it periodically; then you have a dirty environment.

 

 

2) Hours of operation

 

(between 2,000 - 4,000 hours per year)

Follow your user manual.
Use monthly intervals for filter changes and not the hours of operation as your guide. This means air and oil filters changed every quarter (or more frequently) as well as air/oil separators changed per instruction manual. Please note if you are running 24 hrs / 7 days then air and oil filters will need to be changed in accordance with OEM recommendations.

3) Costs

Preventative maintenance saves money. A proper preventative maintenance program will translate into more reliable operation and less down time. This will create a more efficient production process for you = more income on a consistent basis.

In all other instances the OEM manual should be used as a guideline for changing all filters for the proper maintenance your rotary screw compressor.

 

FSCURTIS provides an Operators Manual with specific guidelines for preventative maintenance. Some compressor designs may require more steps and checks, but here is a good place to start to get the longest life out of your FSCURTIS Rotary Screw Air Compressor.

Daily:   Check for unusual sounds, vibration, leaks, warnings or alarms on the controller, etc.

 

 

 

 

 

• Check oil level
• Monitor temperature and pressure
• Check control panel for any alarms or maintenance lights

Monthly: Perform Daily checks

• Clean inlet air filter and enclosure filters.
• Check operation (load and unload, low and high pressure set-points, maintaining pressure, etc)

Quarterly: Check hour meter and check the maintenance schedule to determine if its time for maintenance to be scheduled. Your compressor may require lubrication change at 2,000, 4,000 or 8,000 hours depending on the manufacturer’s recommendations.

• Take oil sample if needed
• Check separator scavenger line flow (if applicable)
• Check v-belts (if applicable)
• Perform daily and monthly checks

Semi-Annual or 4000 hours:  Perform Quarterly Check list.

• Change air/oil separator filters (spin on or drop in type)
• Take oil sample and sent to compressor vendor

Annual or 8000 hours: Start by checking annual maintenance list for manufacturer’s recommendations:

• Change lubricant
• Change air / oil separator (drop in type)
• Perform quarterly checks

The average list price for the NXB15 20 HP ROTARY COMPRESSOR?

$13,404 LIST PRICE FOR NXB15 20 HP TANK MOUNTED

OUR PRICE: $10,723.