EFFECTIVE TANK MIXING FROM AN OPERATORS POINT OF VIEW

Jan 21, 2014   //   by David S. Pratt   //   Uncategorized  //  No Comments

As an operator in today’s industrial plants, you are called to be a true jack-of-all-trades.

The effective operator must have multiple skills, advanced knowledge of equipment, an understanding of several mechanical principles, and a bit of chemistry thrown in for good measure. It’s no wonder that a experienced operator in today’s plant is one of the most important people in the company.

Let’s look at a common application…Mixing… From your point of view.

It is common to have batch mixing operations in which dry solids are added to a tank containing liquids to produce a homogenous blend or slurry to be used in a process.

An example of this would be adding sacks of dry polymer to a tank of water.

Unlike some materials that quickly go into suspension, some polymers must be agitated in order to sufficiently “wet out” the powder into a soluble solution. From an operator’s vantage point, this usually means that he or she is looking down at the top of the tanks liquid surface. Since most slurries are not clear, the surface of the liquid is all that the operator can see.

It is a common misconception that an actively rolling surface = a well mixed tank.

On the contrary, the presence of excessive surface action is an indication that the mixer is in the wrong position for effective mixing. Also the presence of a vortex or tornado like activity on the surface of the tank means that air is being sucked into the impeller and is effectively keeping the liquid and solid from being effectively mixed. We have a set of 3 unique videos available in which the operators can learn the correct positioning of a mixer in a tank in order to make their job much easier.

Here are the links to the instructional videos:

Mixer position & RPM optimized for tank mixers – http://www.youtube.com/watch?v=RA6L_zTvmxk

Mixing using liquid tank baffles- http://www.youtube.com/watch?v=J96TEOjgscE

Mixer provide uniform suspension- http://www.youtube.com/watch?v=Sj9SL6A61qo

Mixing is much more than placing a mixer in a tank and turning it on. Let us show you the difference in a quick and easy transfer of information. You are the heart of the process. We can help you do a more effective job or improve an existing process. We look forward to hearing from you…

HEC announces addition of new outside sales representative.

Oct 1, 2013   //   by David S. Pratt   //   Business  //  1 Comment

I am pleased to announce the hiring of Hunter T. Pratt as HEC’s new outside salesman for domestic accounts. Hunter is a  graduate in marketing from Louisiana Tech University and comes to the company after three successful years in sales for a Baton Rouge area specialty chemical supply firm.

After training on HEC products and systems, Hunter will assume responsibility for accounts in Louisiana, Mississippi, and Southern Arkansas.

Hunter Equipment Company’s role in our customers/manufacturers eyes:

Apr 5, 2013   //   by David S. Pratt   //   Uncategorized  //  No Comments

The role of distributors and/or manufacturers representatives in the procurement process is often misunderstood. Some customers wonder if it would be easier and less expensive to bypass this step and deal directly with the manufacturer in an effort to “cut out the middle man” and save money as a result.

Some manufacturers have made the switch in both directions, changing from direct factory sales to a distributor/rep or gone from distribution back to direct sales. Naturally their intent is to capture more market share and profits from their operations.

Therein lies the question…What benefits do I receive when dealing with Hunter Equipment Company?

With 30 years experience in this industry and having celebrated the 19 year anniversary of starting my company on April 1, 1994, I feel that I have a firm vision of what we bring to the table. I see HEC as a liason between our customers and the manufacturers that we serve. Dealing with highly technical, specialized industrial equipment designed to handle the worst abrasive, corrosive, and dangerous slurry applications—we provide experience, expertise, and consistent performance in the process of supplying the right product at a fair price. Continuous follow up as the process progresses from RFQ to Order to Delivery and Startup and onsite support gives our customers the information they need before during and after the products are onsite and integrated into their process.

Sometimes, our role is to find a better solution to an existing maintenance or operational problem. We join the technical decision makers of the customer with the technical experts of the manufacturers we represent, providing the necessary technical data and field observations to assist in improving the efficiency and reliability of the process. Once the order is placed, HEC is responsible for insuring that the logistics are in place and the customer is informed of the progress of the equipment as it goes through the manufacturing, shipping, and delivery process.

We follow our products until installation and assist the plant in start up and performance evaluation. We are there every step of the way adding our knowledge and experience to the process.

Most important to the customer:  The use of distributors adds nothing to the final cost to the end user.

Most important to the manufacturer:  Distributors are not paid employees and earn their living supplying quality goods and services to the satisfaction of their customers…or they simply go out of business…

“Quality Costs More”

Dec 11, 2012   //   by David S. Pratt   //   Business  //  No Comments

Purchasing departments of industrial plants and factories have a tough job to do trying to source the equipment and parts required to keep a facility running and on budget. In an age of instant communication and unlimited websites, there are hundreds of offers trying to entice a customer into using one supplier over another based on “lowest price”. Unfortunately, many of these sources have no experience with the needs of the customer and are simply an avenue to buy even technical items as if they were everyday commodities.

There is one fact that always remains constant, “quality costs more”.

It does not matter if you are looking at homes, education for your kids, automobiles, food, clothes, or a valve to isolate your pipeline…quality always costs more initially.  But as you already know, quality lasts longer and reduces your overall cost of ownership through lower maintenance and operating cost.

At Hunter Equipment Company, we are rarely the low bidder on openly broadcast RFQ’s. However, in the world of pumps, valves, mixers, and process equipment in our territories, if it will not work in your process or will not give you a lower cost of ownership over the life of the equipment….we will not quote.

I would rather lose a sale than take a chance on supplying one of my customers with something that will not live up to our high standards.

Slurry pumping system pressure … critical analysis info not always available due to plugged gauges…

Nov 7, 2012   //   by David S. Pratt   //   Business  //  1 Comment

The ability to confirm accurate system pressure in piping handling solids laden slurries has plagued process engineers forever. Process slurries such as alumina hydrate, crushed rock, or boiler ash carry high concentrations of solid particles in solution throughout the piping system while maintaining the necessary velocity to keep the solids in suspension. As a result, a reliable visible confirmation that the system pressure is within the proper range is critical…

The Appcor Slurry Gauge Guard is a simple but effective device, designed by a long time slurry handling equipment supplier to effectively isolate the pressure gauge to prevent plugging. The top of the guard is filled with mineral oil and the gauge reads the pressure or vacuum through the barrier fluid and remains free of solids.Purge valves and/or scale removal rods are optional

 

Simple, inexpensive, and valuable process information that has been sacrificed for years is now easy to access.

http://www.appcor.com/guard.htm

Slurry System Analysis

Oct 16, 2012   //   by David S. Pratt   //   Business  //  No Comments

Calculating the system curve of a slurry pump application involving settling solids in suspension is quite different than that of a clean fluid. The size, shape, density, and concentration of solids all factor into selecting a pump that will deliver the material to its discharge point in a homogenous form. Solid particles must be kept above their settling velocity as the material is transferred from the pump through the piping. Hunter Equipment Company is experienced in the selection and specification of slurry handling pumps to handle the toughest duties. Let us take a look at your biggest pump headache. Chances are we have seen it before or we can get in touch with someone who has….either way you will have access to the world’s best slurry experts. GIW Industries, Thompson Pump, RF Industries, Flowrox, Summit Pump….HEC represents and distributes the equipment and expertise of the best slurry handling products…at no extra cost to you.

What is “Slurry” and why does it take a special pump to handle it?

Sep 11, 2012   //   by David S. Pratt   //   Business  //  1 Comment

The word “slurry” is used to describe a liquid with solids in suspension. This can be as light as chocolate milk (cocoa particles suspended in milk), or as heavy as concrete (sand, rocks, crushed limestone in water).

Pumps that are designed to handle slurries must be able to counteract the effect that solids in the material have on the equipment and systems in which they are used. If the solids are abrasive (think sand or crushed rock), the pumps must be constructed of materials that will resist the erosion that comes as a result of the impact of those particles have as they come into contact with the pump casing and impeller. Special hardened metal alloys, elastomer liners, or combinations of both are commonly used to effectively control these forces. The impellers are designed with wider vanes to handle over sized materials that are commonly found in processes such as hard rock mining, dredging, or pulp and paper.

Selection of pumps to handle slurries with settling solids must take into consideration the size, density, shape, and concentration of the solids along with the temperature and viscosity of the liquid in the mixture. If you take a gallon of water and add a cup of dry sand to it, the sand particles will quickly settle to the bottom of the container. If you are pumping a slurry containing sand, the material must maintain a velocity within the pump and the piping to maintain the particles in suspension or the pipe will quickly become clogged. Therefore, the heavier the solids—the faster they will settle and the higher the velocity required to keep the solids in solution.

These are just a couple of the details that are taken into consideration when selecting a slurry pump. Similar to the difference in jogging on pavement vs jogging on the beach, the effects of solids require special considerations and designs to counteract the changes brought about by the materials being pumped.

Foundation

Sep 4, 2012   //   by David S. Pratt   //   Business  //  No Comments

GIW Industries has been the rock on which I have built Hunter Equipment Company as the most complete slurry handling equipment supplier in the southern US, Jamaica, and Dominican Republic. GIW awarded HEC the contract to represent the finest and most technically advanced supplier of slurry pumps used in the transport of solids…Tagged by persons who have witnessed their work at their Grovetown, GA facility as an “Engineering Company that Builds Pumps”, their history and pioneering work in this special niche market lead the world in design and materials to handle the toughest mining and slurry markets. Visit their website for a quick tour of a different approach to manufacturing, engineering, and slurry research happening daily just outside beautiful Augusta, GA.  www.giwindustries.com

My heart and loyalty will always be with the company that gave a “lucky” young guy a chance to build his dream and have supported my company since April 1994..

DSP

Company Re-Branding!

Aug 28, 2012   //   by David S. Pratt   //   Business  //  No Comments

Welcome to my first blog and first blog post on the newly renovated Hunter Equipment Company website. You will notice our original “HEC Swirl” logo/corporate image has been replaced with a fresh updated design that I am still getting used to.
After 18 years in business, it was time for a fresh new look and we are proud to introduce  it to you now.

Original since 1997

New and Improved!

 

The website redesign and Hunter Equipment Company’s new marketing partner Drift Web Design will be rolling out the www.hunterequipmentco.com
fully interactive new website in a couple of weeks. Please look for an upcoming kick off date when the new site will go live.