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# Macawber Engineering, Inc.

Macawber Engineering, Inc.

## Sitemaps

- [XML Sitemap](https://www.macawber.com/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [Posts (Placeholder)](https://www.macawber.com/posts/) - Since the 1970s, Macawber Engineering has expanded our knowledge of dense phase pneumatic conveying systems, serving industries internationally.
- [Powder & Bulk Solids Article](https://www.macawber.com/01/powder-bulk-solids-article/)
- [Macawber UK Ltd.](https://www.macawber.com/09/macawber-uk-ltd/)
- [Macawber Engineering 2025 IPBS Trade Show | Dense Phase Pneumatic Conveying System Demonstration](https://www.macawber.com/09/macawber-engineering-2025-ipbs-trade-show-dense-phase-pneumatic-conveying-system-demonstration/)
- [Pneumatic Conveying System For Bond](https://www.macawber.com/06/pneumatic-conveying-system-for-bond/)
- [New System - Complimentary Commissioning](https://www.macawber.com/05/new-system-complimentary-commissioning/)
- [Long Distance Conveying - The Variflo](https://www.macawber.com/05/long-distance-conveying-the-variflo/)
- [Understanding The Regimes of Pneumatic Conveying - Our Latest Animation](https://www.macawber.com/04/understanding-the-regimes-of-pneumatic-conveying-our-latest-animation/)
- [Macawber Pneumatic Conveying Systems](https://www.macawber.com/04/macawber-pneumatic-conveying-systems/)
- [International Women's Day](https://www.macawber.com/04/international-womens-day/)
- [Stainless Steel Pneumatic Conveyor For Peanuts](https://www.macawber.com/03/stainless-steel-pneumatic-conveyor-for-peanuts/)
- [Mobile Pneumatic Conveying System](https://www.macawber.com/03/mobile-pneumatic-conveying-system/)
- [Sand Conveying With The Macawber Denseveyor®](https://www.macawber.com/02/sand-conveying-with-the-macawber-denseveyor/)
- [Made In TN Manufacturer Of The Week](https://www.macawber.com/02/made-in-tn-manufacturer-of-the-week/)
- [Conveying Barite](https://www.macawber.com/02/conveying-barite/)
- [Decades Old Systems](https://www.macawber.com/12/decades-old-systems/)
- [ISO Recertification - Quality Management](https://www.macawber.com/11/iso-recertification/)
- [Ashveyors® For EAF Dust Conveying](https://www.macawber.com/09/ashveyors-for-eaf-dust-conveying/)
- [Happy World Chocolate Day!](https://www.macawber.com/07/happy-world-chocolate-day/)
- [The Macawber Denseveyor® - One Of The Most Versatile Pneumatic Conveying Systems On The Market](https://www.macawber.com/07/the-macawber-denseveyor-one-of-the-most-versatile-pneumatic-conveying-systems-on-the-market/)
- [Creating Environmental Sustainability With Recycled PET](https://www.macawber.com/07/creating-environmental-sustainability-with-recycled-pet/)
- [AISTech 2023](https://www.macawber.com/06/aistech-2023/)
- [Powder And Bulk Solids 2023](https://www.macawber.com/06/powder-and-bulk-solids-2023/)
- [See Us At The Powder Show](https://www.macawber.com/06/see-us-at-the-powder-show-2/)
- [Sandpump® for 3D Printing Application](https://www.macawber.com/03/sandpump-for-3d-printing-application/)
- [The Macawber Dome Valve®](https://www.macawber.com/02/the-macawber-dome-valve/)
- [See Us At The Powder Show](https://www.macawber.com/01/see-us-at-the-powder-show/)
- [More Systems = More Savings](https://www.macawber.com/01/more-systems-more-savings/)
- [Pneumatic Conveying to Produce the Most Popular Food in the World – Pizza](https://www.macawber.com/12/pneumatic-conveying-to-produce-the-most-popular-food-in-the-world-pizza/)
- [Snippet to the Past - Celebration of the Present](https://www.macawber.com/11/snippet-to-the-past-celebration-of-the-present/)
- [Another Snippet to the Past – Celebration of the Present](https://www.macawber.com/11/another-snippet-to-the-past-celebration-of-the-present/)
- [Happy Energy Efficiency Day](https://www.macawber.com/10/happy-energy-efficiency-day/)
- [32” (800mm) 316 stainless steel Dome Valve® manufactured by Macawber Group for one of the leading chemical companies in India](https://www.macawber.com/10/32-800mm-316-stainless-steel-dome-valve-manufactured-by-macawber-group-for-one-of-the-leading-chemical-companies-in-india/)
- [Renewable Energy with Macawber Engineering](https://www.macawber.com/09/renewable-energy-with-macawber-engineering/)
- [The Macawber Denseveyor®](https://www.macawber.com/09/the-macawber-denseveyor/)
- [Denseveyors® from the mountains of Tennessee to the mountains of Peru](https://www.macawber.com/09/denseveyors-from-the-mountains-of-tennessee-to-the-mountains-of-peru/)
- [Quality Systems Every Time](https://www.macawber.com/07/quality-systems-every-time/)
- [Bringing Old Systems Back to Life](https://www.macawber.com/07/bringing-old-systems-back-to-life/)
- [Dome Valves® for Sand, Silica, Silica Flour, and Silica Pebbles](https://www.macawber.com/07/dome-valves-for-sand-silica-silica-flour-and-silica-pebbles/)
- [In-House Hydrostatic Testing](https://www.macawber.com/06/in-house-hydrostatic-testing/)
- [Pneumatic Conveying for Bentonite Mining](https://www.macawber.com/06/pneumatic-conveying-for-bentonite-mining/)
- [Not Your Everyday Denseveyor®](https://www.macawber.com/05/not-your-everyday-denseveyor/)
- [Foundry Improves Material Handling with Macawber Systems](https://www.macawber.com/06/foundry-improves-material-handling-with-macawber-systems/)
- [Conveying Abrasive Cerabeads](https://www.macawber.com/03/conveying-abrasive-cerabeads/) - A Macawber Denseveyor® and Dome Valve® with controls and an HMI touchscreen pneumatically conveying abrasive cerabeads (synthetic sand) for a foundry in the US
- [Happy St. Patrick's Day](https://www.macawber.com/03/happy-st-patricks-day/) - Go Green this St. Patty’s Day with efficient material handling with Macawber Engineering, Inc. Contact us today for more info and to get started!
- [Difficult To Handle Materials](https://www.macawber.com/02/difficult-to-handle-materials/) - Macawber is able to handle dust, sand, lime, and coke conveying. Find out more on our site, or contact us today for more information.
- [When In Doubt, Test](https://www.macawber.com/02/when-it-doubt-test/) - Our 12,000 ft² purposely built testing facility in Maryville, TN is where we can answer the hard questions for you. Contact us for more information!
- [Keeping Our Systems Running with Service](https://www.macawber.com/02/keeping-our-systems-running-with-service/) - Our mission is to provide the best possible pneumatic conveying systems and keep them up and running for many years to come. Contact us to find out how!
- [The 1" Dome Valve®](https://www.macawber.com/02/the-1-dome-valve/) - Constructed of stainless steel with only one moving part, our Dome Valve® remains one of the most reliable and robust filling valves on the market.
- [Cast Expo 2022](https://www.macawber.com/05/cast-expo-2022/)
- [Stainless Steel Dome Valves®](https://www.macawber.com/02/stainless-steel-dome-valves/) - The perfect solution for frequently failing butterfly valves. Contact Macawber today for more information on our Stainless Steel Dome Valves
- [Interested In Conveying Fragile Materials? Read Our Q&A](https://www.macawber.com/03/interested-in-conveying-fragile-materials-read-our-qa-below/) - How can you select a pneumatic conveying system for your fragile/friable material? The object is to minimize the degradation as much as possible.
- [2021 International Powder and Bulk Solids Show](https://www.macawber.com/09/2021-international-powder-and-bulk-solids-show/) - Check out Macawber’s low-velocity pneumatic conveying show system running at the 2021 International Powder and Bulk Solids Show in Rosemont, IL
- [Denseveyor® Conveying Bentonite](https://www.macawber.com/02/denseveyor-conveying-bentonite/) - Another system shipped! Macawber will be conveying 15.0 T/hr of Bentonite over 200 ft. Bentonite is well suited for conveying with a low-velocity system
- [Fly Ash Pneumatic Conveying](https://www.macawber.com/02/fly-ash-pneumatic-conveying/) - Five systems are on their way to Arizona! These include Macawber Denseveyors® and an Ashveyor®, and they will be conveying various grades of fly ash to 280 ft.
- [30 Year Old Systems Still Running](https://www.macawber.com/02/30-year-old-systems-still-running/) - In 1991, Macawber installed a pneumatic conveying system in a refractory ceramics manufacturer. The systems have kept on until today, exactly 30 years later,
- [New Dome Valve Website®](https://www.macawber.com/02/new-dome-valve-website/) - Our new Dome Valve® website is live! Visit the site by clicking the link in this post. Contact us directly with any questions, or for more information!
- [Conveying Vermiculite For Gypsum Boards](https://www.macawber.com/02/conveying-vermiculite-for-gypsum-boards/) - Macawber recently completed a project to convey vermiculite for a company specializing in the manufacture of gypsum boards. Contact us today for more info!
- [Macawber Dome Valves® 4" to 20"](https://www.macawber.com/02/macawber-dome-valves-4-to-20/) - Macawber Dome Valves® are specially designed for demanding processes providing long-term reliability. Contact us today to learn more & for additional info
- [The Macawber Sandpump®](https://www.macawber.com/02/the-macawber-sandpump/) - Need a sand system that will last? Our Sandpumps® have been around since the 1970s making them our most successful dense phase pneumatic conveying system.
- [Pneumatic Conveying of Fish Food Pellets](https://www.macawber.com/10/pneumatic-conveying-of-fish-food-pellets/) - Case study about Pneumatic Conveying of Fish Food Pellets - transfer rate of 40 t/h for large fish food pellets and over 50 t/h for smaller pellets.
- [Nut Conveying with Stainless Systems](https://www.macawber.com/02/nut-conveying-with-stainless-systems/) - Did you know Macawber pneumatically conveys millions of nuts a year? Our systems are completely food-grade stainless steel, and keep the nuts intact
- [Materials We Can Convey](https://www.macawber.com/04/materials-we-can-convey/) - Our systems can convey a wide variety of materials from foods, minerals, chemicals, cement, pharmaceuticals, sand, biomass, plastics, ash, and much more.
- [Powder Show April 2018](https://www.macawber.com/03/powder-show-april-2018/) - Macawber Engineering, Inc. will be exhibiting in the 2018 International Power and Bulk Solids show in Rosemont, IL, April 24-26. Come visit!
- [New Cement Conveying Benefits](https://www.macawber.com/02/new-cement-conveying-benefits/) - We have recently focused on research and development efforts to improve our cement handling skills even further. Read more about it here!
- [Dome Valve® Benefits & Features](https://www.macawber.com/01/dome-valve-benefits-features/) - Inflatable Seat Valves: Avoid Leakage, Compensate for Wear, Complete Opening, Zero Contact, Proven Concept, High Temperature, High Pressure, & Leak-Proof
- [Macawber Celebrates 40 Years in Business](https://www.macawber.com/11/macawber-celebrates-40-years-in-business/) - We are celebrating 40 years in business! From humble beginnings in Doncaster, England in the early 1970s, we have developed into a worldwide company
- [2017 Midwest Powder Show](https://www.macawber.com/08/2017-midwest-powder-show/) - Come and see our dense-phase, low-velocity pneumatic conveying system in operation at the 2017 Midwest Powder Show at the Greater Columbus Convention Center
- [Globalspec June Newsletter](https://www.macawber.com/06/globalspec-june-newsletter/) - Macawber Engineering, Inc. will be featured in Globalspec’s June issue of “Material Handling & Supply Chain Technology”. Check out their newsletter here!
- [Macawber Design Philosophy](https://www.macawber.com/09/macawber-design-philosophy/) - The Macawber Design Philosophy has been applied to a wide and diverse range of materials in almost every process industry since its introduction in 1977
- [Troubleshooting and Factory Settings](https://www.macawber.com/09/troubleshooting-and-factory-settings/) - We often get questions from our clients that come into our service department. Here is a common Q & A on returning to factory settings.
- [Control and Conveying Air](https://www.macawber.com/07/control-and-conveying-air/) - On any Macawber dense-phase pneumatic conveying system, the quality of the convey air and control air are quoted separately, as they are observed on site
- [Test your bulk material for peace of mind](https://www.macawber.com/07/test-your-bulk-material-for-peace-of-mind/) - Macawber has always been at the forefront of material handling evaluation technology. Testing your bulk materials can provide peace of mind. Contact us today!
- [Hot Stuff ! Dense Phase Conveying](https://www.macawber.com/06/hot-stuff-dense-phase-conveying/) - One of the notable features of our pneumatic conveying systems is their ability to handle hot materials, such as applications in the foundry industry.
- [Fly Ash Conveying Systems, Poland.](https://www.macawber.com/01/fly-ash-conveying-systems-poland/) - Two Macawber Fly Ash Systems were supplied in Poland to convey 30t/h each over a distance of up to 1,265ft horizontal and 121ft vertical
- [When Performance, Longevity, and ROI Matter](https://www.macawber.com/11/when-performance-longevity-and-roi-matter/) - Denseveyor installed below a feed hopper [P3674] Macawber Group Installation Case Study: Sodium Bicarbonate Conveying system, Northwich, UK.
- [ISO 9001:2015: Commitment to Our Customers and Quality](https://www.macawber.com/11/iso-90012015-commitment-to-our-customers-and-quality/) - We are proud to announce that we have successfully transitioned to the new ISO 9001:2015 standard, after first being certified in 1998
- [Lysair Air Solutions, A New Representative in Europe](https://www.macawber.com/10/lysair-air-solutions-a-new-representative-in-europe/) - Mactenn Systems has announced that Lysair Air Solutions has been appointed as the exclusive representative of Mactenn in Belgium, the Netherlands, & Luxembourg.
- [Why is Electric Arc Furnace (EAF) Dust So Difficult to Convey?](https://www.macawber.com/09/why-is-electric-arc-furnace-eaf-dust-so-difficult-to-convey/) - Why is Electric Arc Furnace (EAF) Dust So Difficult to Convey? Learn how Macawber Engineering can assist in your EAF conveying process.
- [Blocked Pipelines? No problem. Simple Guidelines from Dense Phase Experts.](https://www.macawber.com/09/blocked-pipelines-no-problem-simple-guidelines-from-dense-phase-experts/) - What are the reasons for blocked conveying lines? Read These Simple Guidelines from Dense Phase Experts from Macawber Engineering, Inc.
- [Another 3-way diverter valve tested successfully](https://www.macawber.com/08/another-3-way-diverter-valve-tested-successfully/) - Big News from Macawber Engineering: We have successfully tested another 250 mm Stainless Steel 3-way T-Type Diverter Valve to be used for conveying fish food.
- [A Testimonial from Frog Switch, a Foundry Conveying Sand](https://www.macawber.com/06/a-testimonial-from-frog-switch-a-foundry-conveying-sand/) - Read A Testimonial from Frog Switch, a Foundry Conveying Sand. Written by Cas Koshinski, Executive Vice President, and Chief Operating Officer
- [Conveying fragile materials: A new article published by Macawber in the Powder and Bulk Engineering Magazine](https://www.macawber.com/05/conveying-fragile-materials-bulk-engineering/) - Check out Conveying Fragile Materials: A new article published by Macawber in the Powder and Bulk Engineering Magazine in May 2015
- [ASME American Society of Mechanical Engineers](https://www.macawber.com/05/asme-american-society-of-mechanical-engineers/) - Founded in 1908, the American Institute of Chemical Engineers (AIChE) is a nonprofit organization providing leadership to the chemical engineering profession
- [Dense Phase Pneumatic Conveying and Its Benefits](https://www.macawber.com/04/what-are-the-advantages-of-low-velocity-conveying/) - Dense phase pneumatic conveying means using the lowest attainable material velocities to ensure the majority of material remains below the saltation level.
- [What are the advantages of a Controlveyor injection system?](https://www.macawber.com/03/what-are-the-advantages-of-a-controlveyor-injection-system/) - What are the advantages of a Controlveyor injection system? The flow rate must be accurate and controllable. View the entire list here!
- [Bed Ash Pneumatic Conveying Systems, Sardinia.](https://www.macawber.com/12/bed-ash-pneumatic-conveying-systems-sardinia/) - View our recent project of Bed Ash Pneumatic Conveying Systems in Sardinia. They upped transfer rate, reduced compressed air requirements, and are spillage-free
- [Cement Handling Case Study – Ship Loading of Cement](https://www.macawber.com/03/cement-handling-case-study-ship-loading-of-cement/) - Mactenn Systems, a Macawber Group company was awarded a contract to convey 50T/h of cement to ocean vessel using 10 Denseveyor systems
- [Have you seen the February edition of Powder and Bulk Magazine?](https://www.macawber.com/02/have-you-seen-the-february-edition-of-powder-and-bulk-magazine/) - Have you seen the February edition of Powder and Bulk Magazine? Check out our new ad for it! Macawber has been true to our core mission for 40 years.
- [Crushed Limestone Conveying Systems, Poland.](https://www.macawber.com/02/crushed-limestone-conveying-systems-poland/) - Crushed Limestone Conveying Systems, Poland, built with two vessels of Macawber Macpump T150. This achieved all the customer’s specifications!
- [Did you know distilleries use pneumatic conveying?](https://www.macawber.com/01/did-you-know-distilleries-use-pneumatic-conveying/) - Did you know distilleries use pneumatic conveying? The Denseveyor conveys malted barley, as it is filled by gravity through the special Dome® Valve.
- [Why is it important to know the true aerated bulk density of the material to be conveyed?](https://www.macawber.com/03/know-the-true-aerated-bulk-density-of-the-material-to-be-conveyed/) - Why is it important to know the true aerated bulk density of the material to be conveyed? Aerating the material in a feed hopper ensures it enters the vessel
- [What is the difference between dilute phase and dense phase pneumatic conveying?](https://www.macawber.com/03/dilute-vs-dense-phase-pneumatic-conveying/) - Dilute phase conveying occurs at or above the saltation velocity of the material. Dense phase conveying occurs below the saltation velocity.
- [WHAT DO WE NEED TO KNOW TO PNEUMATICALLY CONVEY OUR CHUNKY, SLIGHTLY STICKY MATERIAL?](https://www.macawber.com/01/pneumatically-conveying-chunky-slightly-sticky-material/) - What do we need to know in order to know to pneumatically convey our chunky or slightly sticky material? Read more here from Macawber Engineering, Inc.
- [Why Choose Macawber Engineering Inc ?](https://www.macawber.com/06/why-choose-macawber-engineering-inc/) - Macawber operates worldwide with manufacturing bases in the USA, China, India, Brazil, and the UK. We've stayed true to our core for over 40 years!
- [Macawber Awarded a Substantial Contract](https://www.macawber.com/05/macawber-awarded-a-substantial-contract/) - Macawber has been awarded a substantial contract for conveying EAF Dust for a steel mill located in Arkansas. The order includes 28 Ashveyor systems!
- [Coal Dust & Pellet Conveying Systems, Holland](https://www.macawber.com/11/coal-dust-pellet-conveying-systems-holland/) - Coal Dust & Pellet Conveying Systems. Three dense-phase, low velocity pneumatic conveying systems were supplied to convey coal dust.
- [Mixed Mortar Conveying Systems, Holland](https://www.macawber.com/11/mixed-mortar-conveying-systems-holland/) - The low velocity dense-phase pneumatic conveying system supplied conveys in 90t/h of mixed mortar over a distance of 360ft horizontal and 115ft vertical.
- [The Dome Valve](https://www.macawber.com/08/the-dome-valve/) - We are the original designers and patent holders for the world famous Dome Valve.
- [Welcome to the Macawber Blog!](https://www.macawber.com/07/welcome-to-the-macawber-blog/) - View case studies, solutions, news and more from Macawber Engineering, Inc. Check back often for new blog articles.

## Pages

- [Home](https://www.macawber.com/)
- [About](https://www.macawber.com/about-2/) - Our focus is to be experts in dense phase pneumatic conveying, to understand the processes & flow characteristics of materials, & design high-quality systems.
- [Privacy Policy](https://www.macawber.com/privacy-policy/)
- [Industries](https://www.macawber.com/industries-2/) - Learn how Macawber Engineering, Inc. works with industries such as Biomass, Minerals, Metals & Foundry, Chemicals, Power, Foods and Plastics & Resins.
- [Videos](https://www.macawber.com/videos/) - View Videos of the Macawber Denseveyor® and Dome Valve® – our low velocity, pneumatic conveying systems. Contact us today for more information!
- [Contact](https://www.macawber.com/contact/) - We specialize in the design and engineering of low-velocity, dense-phase pneumatic conveying and bulk handling processes. Contact us with any questions!
- [Metals & Foundry](https://www.macawber.com/industries-2/metals-foundry/) - The Steel Industry includes a wide range of processes that handle sand/silica casting, additives, waste products, and electrostatic precipitators (ESP)
- [Variflo](https://www.macawber.com/products/pneumatic-conveying/variflo/) - Specifically designed for pneumatic conveying of bulk material over long distances. Features minimal air consumption. Dust-free, fully enclosed conveying.
- [Info Sheets](https://www.macawber.com/info-sheets/) - View Info Sheets for Macawber Engineering, Including the Denseveyor®, Ashveyor®, Sandpump®, MiniDenseveyor®, PHO PHV Dome Valve®, PH1 PH2 Dome Valve®, and more
- [Foundry Solutions](https://www.macawber.com/foundry-solutions/)
- [Home](https://www.macawber.com/home/) - Macawber Engineering, Inc. specializes in the design and engineering of low velocity, dense phase pneumatic conveying and bulk handling processes.
- [Dome Valve](https://www.macawber.com/products/valves/dome-valve/) - The Macawber Dome Valve® is unique in its ability to open and close with a tight pressure seal in pneumatic conveying systems for abrasive materials.
- [Sandpump](https://www.macawber.com/products/pneumatic-conveying/sandpump/) - The Sandpump® is designed specifically for applications that require sand conveying. Ideal for retrofit applications, with low profile & top-side discharge
- [Contact Form Submitted](https://www.macawber.com/contact-form-complete/)
- [Get A Quote Form Submitted](https://www.macawber.com/thank-you/) - Thank You for Submitting a Contact Form! We will be in touch shortly. Proud to offer over 40 years of experience & expertise to your valued customers.
- [Cementveyor](https://www.macawber.com/products/pneumatic-conveying/cementveyor/) - The Cementveyor is the ideal replacement for screw pumps which can be inefficient and high maintenance. Same as Denseveyor®, modified for cement applications.
- [Spare Parts](https://www.macawber.com/services/spare-parts/) - With over 40 years of customer and equipment history, we're able to provide parts for new and old systems, minimizing your downtime
- [Dilute Phase Systems](https://www.macawber.com/pneumatic-conveying/dilute-phase-systems/) - Due to high velocity, dilute phase systems are generally aimed at materials that are not abrasive and degradation is not a critical concern to the process.
- [Dense Phase Systems](https://www.macawber.com/pneumatic-conveying/dense-phase-systems/) - The dense phase is characterized by high positive pressure conveying at low velocity. Common regimes of this are Continuous, Discontinuous, & Solid
- [Pneumatic Conveying](https://www.macawber.com/pneumatic-conveying/) - Pneumatic conveying is a process of transferring bulk materials from one location to another in a pipeline by means of gas such as compressed air or nitrogen.
- [Animations](https://www.macawber.com/library/animations/) - The most common dense phase convey regimes include continuous, discontinuous, and solid flow dense phases. View our animations on these processes.
- [Field Service](https://www.macawber.com/services/field-service/) - At Macawber, we have found that close, long-term relationships with our customers are often created through providing after-sales services.
- [Calcium Carbonate](https://www.macawber.com/calcium-carbonate-2/)
- [Case Studies](https://www.macawber.com/library/case-studies/) - Since 1973, Macawber Engineering has striven to be an expert in the realm of dense phase pneumatic conveying. These case studies exemplify that goal achieved.
- [EAF Dust](https://www.macawber.com/eaf-dust/)
- [Biomass](https://www.macawber.com/industries-2/biomass/) - Macawber has been at the forefront of designs that face challenges related to handling biomass with an environmentally-friendly approach
- [Denseveyor](https://www.macawber.com/products/pneumatic-conveying/denseveyor/) - The Denseveyor® is a low velocity, dense phase pneumatic conveying transporter. It operates automatically on an as-needed basis, resting when not in use
- [Diverter Valve](https://www.macawber.com/products/valves/diverter-valve/) - Switch valves & flow diverters are used in pneumatic conveying systems where there's more than one conveying route, reception point, or a combo of the two.
- [Plastics & Resins](https://www.macawber.com/industries-2/plastic/) - Pneumatic conveying in the plastics industry has traditionally been a dilute phase, but dense phase has become an accepted method for conveying plastic pellets
- [Sugar](https://www.macawber.com/sugar/) - Fully sanitary dense phase pneumatic conveying system for conveying sugar
- [Reclaimed Sand](https://www.macawber.com/reclaimed-sand/) - Case study detailing a reclaimed sand application for 3D printing
- [Cerabeads](https://www.macawber.com/cerabeads/) - Pneumatic conveying systems custom engineered for the gentle conveying of cerabeads
- [Brochures](https://www.macawber.com/brochures/) - Download our pneumatic conveying equipment brochures today to learn more information in a printable format.
- [Ashveyor](https://www.macawber.com/products/pneumatic-conveying/ashveyor/) - The Ashveyor® is an ash conveying system dedicated to ESP, baghouse, and other ash handling requirements such as EAF dust. Contact Macawber for More Info
- [PET Pellets](https://www.macawber.com/pet-pellets/)
- [Dome Valves](https://www.macawber.com/library/case-studies/pdl-dome-valves/) - Our Brazilian Licensee, PDL Sistemas, ordered several Dome Valves® for their most recent project of conveying cement, Macawber's own product.
- [Bend Fittings](https://www.macawber.com/products/convey-components/elbows/bends/) - The standard bend fitting for certain dry granular materials is unique to the Denseveyor® system and comes in 30, 45, 60, 75, and 90 degrees.
- [Retrofitting](https://www.macawber.com/services/retrofitting/) - While many of our systems remain in operation for over 20 years, over time, processes can change and equipment may need modifications and/or upgrades.
- [Chromite Sand](https://www.macawber.com/library/case-studies/chromite-sand/) - A previous customer came to Macawber seeking an update on the pneumatic conveying equipment they purchased 20 years ago. We updated and added on to the system.
- [Vermiculite](https://www.macawber.com/vermiculite/)
- [Bentonite](https://www.macawber.com/bentonite/)
- [Macpump](https://www.macawber.com/products/pneumatic-conveying/macpump/) - The Macpump is specifically designed for high tonnage pneumatic conveying of bulk material over long distances. Contact Macawber for more information.
- [Pipe](https://www.macawber.com/products/convey-components/pipe-30/) - Nominally sized to meet the pneumatic vessel outlet diameter. Preferred pipe connection arrangements are raised free slip-on flanges.
- [Get A Quote](https://www.macawber.com/get-a-quote/) - We specialize in the design and engineering of low-velocity, dense-phase pneumatic conveying and bulk handling processes. Contact us for a quote!
- [Power](https://www.macawber.com/industries-2/power/) - Over the years, we've installed systems in power utility plants where most fly ash is produced in economizers, air heaters, & electrostatic precipitators (ESPs)
- [Minerals](https://www.macawber.com/industries-2/minerals/) - Mineral applications such as cement, glass, roofing, lime processing, and others typically require high conveying rates often to be delivered at long distances.
- [Foods & Pharmaceuticals](https://www.macawber.com/industries-2/food/) - For hygiene reasons, pneumatic conveying is the method of conveying all food raw materials and finished products to eliminate spillage, dust, and contamination.
- [Chemicals](https://www.macawber.com/industries-2/chemicals/) - Our Dome Valve® is well suited for chemical applications with configurations that can be costumed to ensure chemical compatibility.
- [Our Approach](https://www.macawber.com/pneumatic-conveying/our-approach/) - Macawber Engineering, Inc.'s philosophy is to design manufacturing systems that are simple, reliable, energy-efficient, and meet the project's goals
- [Sand](https://www.macawber.com/library/case-studies/sand/) - Macawber’s model 8/8-5 Denseveyor® equipped with our reliable and robust Dome Valve® fit the application and exceeded the client's overall demand requirements
- [Cement](https://www.macawber.com/library/case-studies/cement/) - Our Brazilian licensee, PDL Sistemas, provided a company with a pneumatic conveying system for an intermediate system conveying to a final storage silo.
- [Silica Sand](https://www.macawber.com/library/case-studies/silica-sand/) - For this case study, two systems to handle sand were installed in Charlotte, North Carolina. The objectives were reliable conveying, low pipe wear & consumption
- [MiniDenseveyor](https://www.macawber.com/products/pneumatic-conveying/minidenseveyor/) - The MiniDenseveyor is designed for very low tonnage pneumatic conveying applications while still achieving the same distance as the larger models
- [Bed Ash](https://www.macawber.com/bed-ash/)
- [Titanium Dioxide](https://www.macawber.com/library/case-studies/titanium-dioxide/) - A large corporation’s paint division of Matteson, Illinois relied on Macawber Engineering for its titanium dioxide conveying needs and was pleased with results
- [Steel Smelter Ash](https://www.macawber.com/library/case-studies/steel-smelter-ash/) - The customer purchased nine systems, comprising mostly Ashveyor and Denseveyor pneumatic conveying systems, for their steel plant in China.
- [Reclaimed Foundry Sand & Dust](https://www.macawber.com/library/case-studies/reclaimed-foundry-sand-dust/) - Our customer fully opened its new 30,000 ft cast plaque foundry in Decorah Iowa in the spring of 2008, complete with several Denseveyors, Sandpumps, & more
- [Raw Coal Fuel](https://www.macawber.com/library/case-studies/raw-coal-fuel/) - The customer selected reliable & robust Macawber Denseveyor systems in an explosion-proof configuration to achieve a clean transfer of coal to the bunker
- [Pulverized Fuel Ash](https://www.macawber.com/library/case-studies/pulverized-fuel-ash/) - A company in England relied on Macawber Engineering at their Cottam Power Station (4×500 MW) to replace an existing system with a Macawber Ashveyor® System
- [Make-Up Bed Sand](https://www.macawber.com/library/case-studies/make-up-bed-sand/) - Two companies in California decided to install fluid bed combustors to dispose of waste matter harvested with their nut crop, utilizing the Sandpump
- [Gypsum](https://www.macawber.com/library/case-studies/gypsum/) - The customer selected robust Macawber Denseveyor systems to handle the conveying regime specific to moving gypsum in Tieling City, Liaoning Province, China.
- [Ground Rice Hulls Ash](https://www.macawber.com/library/case-studies/ground-rice-hulls-ash/) - The customer purchased four x 12/12 Denseveyor pneumatic conveying systems to fuel the supply of ground rice hulls to a biomass boiler, and a reliable Ashveyor
- [Ground Rice Hulls](https://www.macawber.com/library/case-studies/ground-rice-hulls/) - In this case study, the customer purchased four x 12/12 Denseveyor systems to replace existing large blow pot type transporters that were not operating.
- [Foundry Sand](https://www.macawber.com/library/case-studies/foundry-sand/) - A 175-year-old corporation contracted with Macawber for the supply of 2 Sandpumps for the purpose of outfitting their foundry located in Hollidaysburg, PA.
- [Copper Concentrate](https://www.macawber.com/library/case-studies/copper-concentrate/) - The challenge of both abrasive & corrosive environmental conditions in the client's copper ore processing plant was solved by pneumatic conveying systems
- [Coal Gasifier Ash](https://www.macawber.com/library/case-studies/coal-gasifier-ash/) - Our customer needed to handle waste material from the gasification process. Two x 8/8-4/8 Denseveyor pressure letdown systems achieved this goal
- [Biomass Fly Ash](https://www.macawber.com/library/case-studies/biomass-fly-ash/) - Macawber Engineering pneumatic conveying systems were used to convey boiler bottom ash and fly ash away to storage for this large brewery.
- [Closed & Sealed Valves](https://www.macawber.com/library/case-studies/closed-sealed-valves/) - This client came to us from a competitor and they were impressed by the Macawber Dome Valves we were able to offer. The special controls are explosion-proof.
- [Library](https://www.macawber.com/library/) - Learn more about Macawber Engineering, Inc. through our library of information - Case Studies, Info Sheets, Animations, Materials List as well as our Blog.
- [Portland Cement](https://www.macawber.com/library/case-studies/portland-cement/) - Intent on running a plant at the lowest cost possible, this Australian cement company utilized the Macpump as a direct replacement for energy-heavy screw pumps
- [Services](https://www.macawber.com/services/) - Learn more about Macawber Engineering, Inc.'s services such as Spare Parts Supply, Field Service, Retrofitting, and Material Testing.
- [Double Dump Valve](https://www.macawber.com/products/valves/double-dump-valve/) - Two Macawber Dome Valves® are arranged to isolate the upstream and downstream process with a volumetric chamber to accumulate material.
- [Dump Valve](https://www.macawber.com/products/valves/dump-valve/) - Dump Valves are where one single conveying pipe route terminates in a series of several reception points at roughly the same location. Contact us for more info
- [Valves](https://www.macawber.com/products/valves/) - The Macawber Engineering Valve Family includes the Dome Valve, Switch Valve, Dump Valve, and Double Dump Valve. Contact us for more information!
- [Controlveyor](https://www.macawber.com/products/pressure-injection-systems/controlveyor/) - The Controlveyor is a uniquely designed injection system, capable of maintaining injection accuracies of ± 3% by volume, even against variable back-pressure
- [Filters](https://www.macawber.com/products/convey-components/filters/) - Our filters are made of passive, cloth bag material with a reverse jet pulse cleaning system. Contact us today for more information on our filters!
- [Ash Breaker](https://www.macawber.com/products/convey-components/ash-breaker/) - The Ash Breaker is a purpose-designed lump breaker and feeder for the reduction of large lump material to be conveyed through the Denseveyor® and Ashveyor®
- [Convey Components](https://www.macawber.com/products/convey-components/) - Macawber Engineering produces various convey components, including Ash Breakers, Filters, Pipes, Elbows, Bends, Terminal Boxes, & Screeners
- [PLC](https://www.macawber.com/products/controls/plc/) - Each dense phase system Macawber provides comes standard with Electro-Pneumatic PLC for communication to seamlessly integrate with the current operating systems
- [Level Probes](https://www.macawber.com/products/controls/level-probes/) - We typically use capacitance level probes in our pneumatic conveying systems. However, other types of level probes are available upon request.
- [HMI](https://www.macawber.com/products/controls/hmi/) - The system Human Machine Interface allows the customer to see trends, performance metrics, diagnostics, and system alerts in real-time.
- [Hoppers](https://www.macawber.com/products/bins/hoppers/) - Macawber Hoppers are frequently used to capture material and are used as reception hoppers with either aeration pads or vibration dependent on material.
- [Dense Phase Advantages](https://www.macawber.com/pneumatic-conveying/dense-phase-systems/dense-phase-advantages/) - A well-designed dense phase pneumatic conveying system provides a variety of benefits. At Macawber Engineering, we offer decades of knowledge on these products
- [Injection](https://www.macawber.com/industries-2/injection/) - The Macawber Controlveyor is a uniquely designed injection system. It is capable of maintaining injection accuracies of ± 3% by volume
- [Pneumatic Conveying System Design](https://www.macawber.com/pneumatic-conveying/dense-phase-systems/pneumatic-conveying-system-design/) - The most critical aspects in choosing a Pneumatic Conveying System are the Material to be Conveyed, its Flow Regime, & Your System Design Objectives
- [More](https://www.macawber.com/industries-2/more/) - Didn't see your industry listed? Contact Macawber Engineering today to learn more about how our processes and equipment can assist your conveyance system.
- [Elbows](https://www.macawber.com/products/convey-components/elbows/) - Our standard elbows consist of 6D and 12D long radius elbows in 90, 60, and 30 degrees. Alumina-ceramic wrapped elbows built for highly abrasive materials.
- [Terminal Boxes](https://www.macawber.com/products/convey-components/terminal-boxes/) - Terminal boxes are Macawber’s unique method of terminating material. An internal, Ni-hard deflector plate directs the material downward.
- [Screeners](https://www.macawber.com/products/convey-components/screeners/) - Macawber’s screeners are generally placed upstream of our pneumatic system to remove either larger or smaller particles before conveying.
- [Silos](https://www.macawber.com/products/bins/silos/) - Whether you need a Silo for a material feed/reception point, truck loading/unloading, material disposal, or storage, Macawber has you covered!
- [Air Receivers](https://www.macawber.com/products/air-equipment/air-receivers/) - Macawber can provide vertical air receivers that meet the system requirements ranging from 60 gallons to 5000 gallons. Contact today for more information!
- [Material Testing](https://www.macawber.com/services/material-testing/) - At Macawber, we believe in routinely testing systems to ensure they achieve maximum performance. Contact us today to schedule a testing session!
- [Bulk Bag Loader](https://www.macawber.com/products/bins/bulk-bag-loader/) - Our bulk bag loaders are used to fill super sacks of material. They are typically constructed of carbon steel and can have a variety of features.
- [Bulk Bag Unloader](https://www.macawber.com/products/bins/bulk-bag-unloader/) - Our Bulk Bag Unloaders are typically constructed of carbon steel and are used to empty super stacks of material. To learn more about their features, contact us!
- [Desiccant Dryers](https://www.macawber.com/products/air-equipment/desiccant-dryers/) - Water vapor is removed from compressed air via a desiccant dryer. The implementation of desiccant dryers is application-specific. Contact us for more info
- [Air Compressors](https://www.macawber.com/products/air-equipment/air-compressors/) - Macawber can supply your company with the Air Compressors needed to convey clean, dry compressed gas while transferring dry, bulk materials. Call for more info!
- [Pressure Injection Systems](https://www.macawber.com/products/pressure-injection-systems/) - Macawber has been researching & improving upon our pneumatic conveying systems for decades. The Controlveyor is our pressure injection systems model.
- [Pneumatic Conveying](https://www.macawber.com/products/pneumatic-conveying/) - Our Pneumatic Conveying System Products include the Denseveyor, Asheveyor, Sandpump, Cementveyor, Minidenseveyor, Variflo, & Macpump
- [Controls](https://www.macawber.com/products/controls/) - Macawber is experienced in manufacturing PLC, HMI, and Level Probes for our pneumatic conveying systems. Contact us today for more information!
- [Bins](https://www.macawber.com/products/bins/) - Macawber provides Silos, Bins, and Hoppers in varying sizes, materials, and process functions. We can also construct Bulk Bag Loaders & Unloaders.
- [Air Equipment](https://www.macawber.com/products/air-equipment/) - Whether you need Air Compressors, Air Receivers, or Desiccant Dryers to convey your materials, Macawber Engineering is ready to help. Contact us to get started!
- [Vacuum Conveying Systems](https://www.macawber.com/pneumatic-conveying/vacuum-conveying-systems/) - Vacuum systems are commonly used in sanitary and hazardous applications because no moving parts contact the material, and the systems are leak-proof.
- [Pneumatic Conveying Terminology](https://www.macawber.com/library/pneumatic-conveying-terminology/) - Stay Informed on Pneumatic Conveying Terminology by reviewing this list of definitions from Macawbery Engineering, Inc. Learning every day since 1973
- [Materials List](https://www.macawber.com/library/materials-list/) - From Absorbent Clay to Zinc Powder, Macawber Engineering's Pneumatic Conveying Systems can improve your existing processes & increase energy efficiency
- [Blog](https://www.macawber.com/library/blog/) - Our blog contains information on a variety of subjects, from dense phase pneumatic conveying, to our products and commitment to service.
- [Alumina Catalyst](https://www.macawber.com/alumina-catalyst/) - Macawber Engineering recently helped a company pneumatically convey an extremely friable alumina catalyst with virtually no degradation to the product.
- [Products](https://www.macawber.com/products/) - Learn more about Macawber Engineering, Inc.'s products such as Pressure Injection Systems, Valves, Convey Components, Bins, Air Equipment, Controls and more.
- [Conveying Requirements Survey](https://www.macawber.com/conveying-requirements-survey/) - Find out if your company matches the requirements for our conveying systems by describing the material produced, site conditions, & process requirements.

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