H&K AIR COMPRESSOR COMPANY
ROTARY SCREW AND PISTON COMPRESSORS
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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.
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.
|Posted on 14 December, 2017 at 13:25||comments (2726)|
Using the right air compressor oil for your compressor is very important. This is true for both rotary screw air compressors and reciprocating compressors. You can’t just use your cars oil or hydraulic oil!!!!! Compressor oil has a few important functions:
• It removes heat from the compression
• It works as a sealing to prevent air leakage.
• It lubricates all moving parts
• It’s used to cool important parts of the compressor element.
Air compressor oil is specifically designed to do the above jobs well. If you would use oil from your car, your compressor WILL DIE!!
Compressors (and the oil) can get very hot.. normal maximum outlet temperature of a rotary screw compressor element is set at 120 degrees Celsius (if it gets hotter than this, your screw compressor will shut down).
|Posted on 12 December, 2017 at 13:40||comments (3472)|
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