Your equipment controls can sometimes tell you some good stories if you observe carefully. And sometimes tell of problems. Consider two thermal mass cycling air dryers installed in a foundry. Thermal mass cycling dryers are designed to reduce the energy consumption of the internal cooling system by turning off and on (cycling) the refrigerant compressor […]
Air Preparation
Compressed air fail: Blowing reduction
It is very common in an industrial facility to have compressed air blowing applications installed at various locations to provide cleaning of sensing eyes and scanners. Β But it is important to keep in mind that this blowing demand can add up quickly β especially if there are many of these applications installed within the plant. […]
Why is condensate disposal important in compressed air systems?
A wood products company had a two-compressor system installed on a mezzanine. Under the compressors and dryers were the piping and storage receivers. Each tank and each compressor had timer drains installed to expel the condensate that forms when the compressed air cools in the compressor aftercooler, piping, and storage vessels.Β The outlets of these […]
Compressed air fail: Flowmeter position
A local food company was resizing its compressed air system while renewing its plant operations. To get the sizing correct, the plant maintenance foreman purchased a flow meter to measure the output of the compressors. The meter was installed with a data logger to capture the flow profile of the plant. The readings showed that […]
Watch out for dangerous blow wands
Despite years of warnings β and the development of OSHA standards β there are still many dangerous compressed air blow wands in service at facilities throughout the world. Countless injuries and even deaths could have been prevented if safer devices were used or the blowing eliminated altogether. Fig. 1 shows a wand used to clean […]
Using CAGI data sheets for refrigerated air dryers
If you are shopping for a refrigerated air dryer, it is a good idea to consult the Compressed Air & Gas Institute (CAGI) published data from the manufacturer before you buy. If you buy a non-cycling air dryer, the unit will consume about the same power no matter what β even if the associated air […]
Are electropneumatic controllers suitable for vacuum applications?
Both electropneumatic pressure regulators and flow control valves can be utilized in controlling vacuum systems. By using an electropneumatic pressure regulator, the designer develops a system which the suction force of the vacuum cup can be precisely controlled. The function of the electropneumatic flow control remains the same when controlling the flow of air in […]
Can electropneumatic controllers control force, tension, and torque?
Contributed by Justin Fluegel An electro-pneumatic pressure regulator is an ideal option to control the force, tension, or torque within a system. The pressure within a system directly correlates to the amount of force available to the actuator β lower pressure results in a lower force and vice versa. For the controller to regulate the […]
A leak detection fail!
A recent question received by email:Β I need some help from you regarding air leak calculation.Β We just purchased a new air leak detector that calculates leakage flow.Β We have high air leakage in our LPG bottling plant and our leak detector showed a flow of 9130.2 L/S.Β If we convert this to CFM then it will total […]
Why should you look for hidden leaks in your compressed air system?
Air leaks can form in many places in a compressed air system. Some are obvious, but others are well hidden from detection. In Fig. 1, we can see a compressor air cooler that has been subject to frequent high-pressure cleaning using compressed air blow wands. And due to the stresses involved with the cleaning, it […]
