Tag: pneumatic control system

Is It Plugged In? Let’s Go Back To the Basics 1 of 6

Published on by Brian FarnoLeave a comment

Today, I want to kick off something a little different with the blog and start back at the basics. Over the next series of posts, we’ll walk through the Six Steps to Optimizing Your Compressed Air Systems. The goal is simple: to help you evaluate your current setup, identify opportunities for improvement, and put real numbers to the savings you can achieve.

Six Steps to Optimizing Your Compressed Air System

The first step to optimization is to measure and understand your compressed air consumption. There are several ways to do this, but one of the most effective is with our Digital Flow Meter paired with a Summing Remote Display or a USB Data Logger.

  • The Digital Flow Meter provides real-time data on compressed air usage.
  • The Summing Remote Display allows you to track cumulative usage over a 24-hour period (or longer).

By installing these tools, you can measure usage across your entire system or isolate a single machine. Once you start gathering data, you’ll quickly see the difference that EXAIR products can make in reducing consumption and improving efficiency.

With usage data in hand, you’re ready to move on to step two—stay tuned for the next installment. If you’d like to jump ahead or talk through your system directly, I’d be happy to connect.

Brian Farno, MBA – CCASS Application Engineer

BrianFarno@EXAIR.com
@EXAIR_BF

Eliminate Costly Leaks with the Ultrasonic Leak Detector

Published on by jasonkirbyLeave a comment

The generation of compressed air accounts for approximately one-third of energy costs in industrial environments. According to the Compressed Air Challenge, around 30% of this compressed air is lost due to leaks. As a result, nearly 10% of a facility’s energy expenses are wasted because of poor connections, faulty air valves, and improper installations. Beyond the financial implications, these leaks can cause significant operational inefficiencies. A drop in system pressure can adversely affect end-user performance, reducing production efficiency. Furthermore, this pressure decline may lead to increased cycling of equipment, potentially shortening the lifespan of compressors and other machinery. If leaks diminish the supply volume, it may create a misleading perception that additional compressor capacity is necessary, further driving up operating costs.

When a leak occurs, it produces ultrasonic noise due to turbulence, typically at frequencies exceeding 20 kHz, which are inaudible to humans. The EXAIR Ultrasonic Leak Detector, model 9207, is specifically engineered to identify these frequencies and transform them into audible sounds using a method called “heterodyning.” This device is equipped with a signal strength indicator and a bar graph display, allowing users to detect even the smallest leaks. It comes with two attachments: a parabolic microphone that can detect leaks from distances of up to 20 feet, and a tube attachment for accurately locating leaks among multiple connections within a pipe. Once a leak is detected, it can be marked for subsequent repair.

The ULD features specialized attachments that effectively reduce background noise typically found in industrial environments. It includes “+” and “-” buttons, allowing for precise sensitivity adjustments of the meter. This advanced model significantly improves leak detection in hard-to-reach areas and complies with the IEC 61326-1 standard, ensuring reliable performance in the electromagnetic conditions commonly encountered in industrial facilities.

Implementing a leak protection program in industrial facilities can lead to significant cost savings with relative ease. Should you have any inquiries regarding the integration of the Ultrasonic Leak Detector into your existing leak protection strategy, please feel free to contact us for assistance.

Jason Kirby
Application Engineer
Email: jasonkirby@exair.com
Twitter: @EXAIR_jk

Comparing and Combining Sound Levels

Published on by Al WooffittLeave a comment

Sound levels are an important safety consideration in most industrial facilities. OSHA has guidelines on allowable noise levels and exposure, covered in OSHA Standard 29CFR – 1910.95 (a). Sound levels are measured in decibels, or dB. It makes sense that a higher decibel value means a louder sound (as illustrated in the graphic below). What is not intuitive is how multiple sound levels interact and combine, or how they compare to one another.

The first thing to understand about sound levels is that they aren’t measured on a linear scale. Instead, they’re measured on a logarithmic scale. This can really throw off our intuition. For instance, a sound at 20dB is actually 10 times stronger than one at 10dB, and a sound at 30dB is 100 times stronger than 10dB. If it were a linear scale, 20dB and 30dB would only be 2 and 3 times stronger than 10dB, similar to how mass works—like 20kg being double the mass of 10kg.

You can see why this is the case with the formula for calculating sound levels, which is as follows:

It’s important to note that the sound pressure levels calculated using this formula are unweighted. To really grasp how loud something will seem to us, we have to consider how our ears pick up various frequencies. This means that low and extremely high frequencies are given less weight than on the standard decibel scale. This adjusted measurement is referred to as dBA. You can check out some typical sounds and their dBA levels in the chart below:

Because of this logarithmic scale, combining two sounds can be pretty counter-intuitive too. Our Model 1100 Super Air Nozzle generates a sound level of 74 dBA, but when you place two of them side by side, the sound level jumps to 78 dBA (and not 148dBA). This is determined using the formula below:

The specifics of this calculation are explained in this blog here, but OHSA provides a quick and easy way to calculate, as shown in the table below:

To see if you need to tackle the noise levels in your facility, you should start by taking a baseline measurement of the different processes and devices that are making the noise. EXAIR’s Sound Level Meter, Model 9104, is here to help. It’s super user-friendly and gives you a digital readout of the sound level (no need to deal with logarithms!).

If you would like to discuss sound levels in your facility, or any of your other compressed air needs, give us a call!

Al Wooffitt
Application Engineer

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How To Prevent Pressure Drops

Published on by jasonkirbyLeave a comment
Issue 1

Compressed air serves as the essential utility for operation, and its performance limitations are determined by the supply available. To effectively utilize EXAIR products and pneumatic equipment, it is crucial to establish a method for transferring compressed air from the source to the point of use. This can be accomplished through three primary means: pipes, hoses, and tubes.

As compressed air travels through the distribution system, it experiences friction against the inner surfaces of pipes, tubes, and hoses. Factors such as the diameter of the pipe, its length, the number of bends, and the smoothness of the inner wall contribute to this friction. Consequently, a reduction in air pressure occurs due to this resistance. Additionally, pressure drops can also happen at the point of use, particularly if the line is inadequately sized, which can significantly affect the performance of the equipment being powered.

When designing and maintaining a compressed air system, it is essential to take pressure measurements at various locations to detect and resolve potential issues before they escalate. The Compressed Air Challenge recommends specific points for regular pressure assessments to accurately gauge the operating pressure of your system.

  • Inlet to compressor (to monitor inlet air filter) vs. atmospheric pressure
  • Differential across air/lubricant separator
  • Inter-stage on multistage compressors
  • After-cooler
  • At treatment equipment (dryers, filters, etc.)
  • Various points across the distribution system
  • Check pressure differentials against manufacturers’ specifications. If high pressure drops are noticed, this indicates a need for service.

After taking the necessary measurements, you should sum the recorded pressure drops and subtract this total from your compressor’s operating range. The resulting value represents the actual operating pressure at the point of use.

If your distribution system is correctly sized and the pressure drops across your equipment are within acceptable limits, any pressure drop observed at the point of use suggests a lack of sufficient air volume. This issue may stem from restrictive fittings or inadequately sized air lines, hoses, or tubes. It is essential to ensure that the point of use product is installed in accordance with the manufacturer’s specifications for compressed air.

If you have questions about pressure drops, or anything regarding EXAIR and our products, please do not hesitate to reach out.

Jason Kirby
Application Engineer
Email: jasonkirby@exair.com
Twitter: @EXAIR_jk