Reader Forum

Agitating action feedback While I agree that air agitation as described in "Agitating action" (Simple Solutions, PE, May 2001, p 12) is a good, effective means of agitating the contents of storage vessels, there are two points that should be noted. Do not use the plant compressed air system as the source of the air.


Agitating action feedback

While I agree that air agitation as described in "Agitating action" ( Simple Solutions , PE , May 2001, p 12) is a good, effective means of agitating the contents of storage vessels, there are two points that should be noted.

  1. Do not use the plant compressed air system as the source of the air. The high pressure system (90 psi or greater) is the most expensive utility in the plant, based on energy and maintenance. In this application, it is also unregulated as to pressure and volume in most cases. Instead, order a high volume, low pressure blower and dedicate it to the tanks or sumps. This works very well as the head of liquid involved is usually very low (typically less than 30 ft of water or 14.5 psi).

  2. The holes in the sparger should be located on the bottom half of the horizontal section at about 45 deg from vertical on both sides of the center of the bottom of the pipe. This position forces the air to push the fluid out of the section first and then starts the bubbling evenly across the length of the pipe. Information from the suppliers would confirm this design.

    1. I enjoy your magazine and appreciate the ideas and articles. — Donald W. Erskine, Manager, Facilities Engineering, EnerSys Inc., Reading, PA

      Pushing tape a different way

      I have a comment on "Pushing tape through conduit." ( Simple Solutions , PE , April 2001, p 8) Although air may work in this situation, it would be easier and safer to use a vacuum on one end. Using air to push the nut, you may hit something — like live energized parts of panels — or someone — like the helper waiting at the other end. To use the vacuum method, you use a sponge product, sometimes referred to as a "sponge pig," or a newer product that looks like a parachute, or I have even used a small piece of plastic page and sucked it through the pipe. — Daniel Linton, Industrial Maintenance Coordinator/Instructor, Garden City Community College, Garden City, KS

      Positive vendor relationship pays off

      Thanks for a great Editorial regarding the handling of subcontractors and various other vendors ("Lessons from a neophyte," PE , May 2001, p 10).

      I feel that a great vendor will save you more money that you ever know. He also will make you look good because he performs his job with great aplomb and apparent ease. My hazardous waste broker is just that type of vendor. When he is here on-the-job, I can literally walk out and not worry in the slightest. It would take at least a 10% decrease in costs just to get me to consider another vendor. I do about $150,000/yr with the firm.

      The vendors that I do not have that relationship with, drive me wild! They do not show up when they are supposed to, overbill, and almost always are unwilling to correct anything. — John Atkins, CPE, Webcraft, a Vertis Direct Marketing Service, North Brunswick, NJ


      "HowStuffWorks" in the May issue (p 80) contained an error. The text stated, "When the switch on the electromagnet is open, it attracts the armature (blue)."The text should have stated, "When the switch on the electromagnet is closed, it attracts the armature (blue)."

No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
2016 Top Plant; 2016 Best Practices on manufacturing progress, efficiency, safety
2016 Product of the Year; Diagnose bearing failures; Asset performance management; Testing dust collector performance measures
Safety for 18 years, warehouse maintenance tips, Ethernet and the IIoT, GAMS 2016 recap
Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Safety at every angle, Big Data's impact on operations, bridging the skills gap
Ensuring SCADA/HMI cybersecurity; Optimize manufacturing value in real-time; Simplifying drive-based and controller-based automation
Tying a microgrid to the smart grid; Paralleling generator systems; Previewing NEC 2017 changes
Package boilers; Natural gas infrared heating; Thermal treasure; Standby generation; Natural gas supports green efforts

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
This article collection contains several articles on the vital role of plant safety and offers advice on best practices.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
This article collection contains several articles on strategic maintenance and understanding all the parts of your plant.
click me