{"id":1107,"date":"2019-04-24T14:04:16","date_gmt":"2019-04-24T14:04:16","guid":{"rendered":"http:\/\/localhost:10063\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\/"},"modified":"2022-09-30T19:04:13","modified_gmt":"2022-09-30T19:04:13","slug":"white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime","status":"publish","type":"post","link":"https:\/\/hapman.com\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\/","title":{"rendered":"How Industry Expertise Ensures Correct Flexible Screw Conveyor Selection and Process Uptime"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p>Most if not all manufacturing operations that deal with bulk materials will agree that downtime and loss of production are at the top of their list of process concerns.<\/p>\n\n\n\n<p>Downtime in a bulk material handling operation can usually be traced to the equipment that moves the material throughout the process.<\/p>\n\n\n\n<p><a title=\"Helix Flexible Screw Conveyor | Hapman.com\" href=\"\/equipment-and-systems\/conveyors\/helix-flexible-screw-conveyor\/\" target=\"_blank\" rel=\"noopener noreferrer\">Flexible screw conveyors<\/a> are among the most common pieces of equipment found in these operations and have been used in dry processing applications for decades. They are a reliable, simple and low-maintenance bulk material handling solution that uses a single moving part to effectively convey dry material from one point to another.<\/p>\n\n\n\n<p>As such, they are regarded by many manufacturers as a commodity item that can be interchanged from one application to another. In this article we will:<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:65%\">\n<ul class=\"wp-block-list\"><li>Identify the stage of a process where the greatest potential for equipment downtime exists.<\/li><li>Explain how flexible screw conveyor options can minimize this potential.<\/li><li>Illustrate the importance of an equipment provider\u2019s industry expertise to making the correct conveyor decision.<\/li><\/ul>\n\n\n\n<p>With&nbsp;<a href=\"https:\/\/hapman.com\/equipment-and-systems\/conveyors\/helix-flexible-screw-conveyor\/\" target=\"_blank\" rel=\"noreferrer noopener\">flexible screw conveyors<\/a>, failures almost always occur during the initial start-up of the equipment. This is a clear indication that the conveyor manufacturer did not specify the conveyor correctly or outfit it with the correct options to ensure proper operation within the application.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"350\" height=\"286\" src=\"https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-flexible-screw-conveyor-image.jpg\" alt=\"Flexible screw conveyor\" class=\"wp-image-1413\" srcset=\"https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-flexible-screw-conveyor-image.jpg 350w, https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-flexible-screw-conveyor-image-300x245.jpg 300w\" sizes=\"auto, (max-width: 350px) 100vw, 350px\" \/><figcaption><strong>Flexible Screw Conveyor<\/strong><\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>Whether it is a new installation or a replacement for a faulty piece of equipment, a misapplied <a title=\"Helix Flexible Screw Conveyor | Hapman.com\" href=\"\/equipment-and-systems\/conveyors\/helix-flexible-screw-conveyor\/\" target=\"_blank\" rel=\"noopener noreferrer\">flexible screw conveyor<\/a> will fail to get the job done for two primary reasons:<\/p>\n\n\n\n<p><strong>\u2022 Material flow.<\/strong> The conveyor will not be able to move or elevate the material properly through the process, eject the material out of the discharge end of the conveyor, or move the material to the next stage of the process after filling the hopper. In any of these scenarios, the conveyor will not be able to keep up with downstream processes.<\/p>\n\n\n\n<p><strong>\u2022 Screw breakage.<\/strong> An inferior duty screw will break shortly after start-up. Similar-duty replacement screws will continue to break due to incorrect specification. Even when dealing with a responsive equipment provider, it can be timeconsuming for a 20-foot replacement screw to arrive via truck or common carrier, which adds to the length of production loss and downtime.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Getting Started with an Initial Application Review and Flow Analysis<\/h2>\n\n\n\n<p>An experienced <a title=\"Helix Flexible Screw Conveyor | Hapman.com\" href=\"\/equipment-and-systems\/conveyors\/helix-flexible-screw-conveyor\/\" target=\"_blank\" rel=\"noopener noreferrer\">flexible screw conveyor<\/a> provider will ask the right questions to extract the necessary information from a customer, starting with material flow.<\/p>\n\n\n\n<p>Problems related to material flow generally boil down to the type of product being conveyed. If the correct screw type isn\u2019t applied at the outset based on the specific material the conveyor will be required to handle, all of the material flow issues mentioned earlier will arise and compromise production.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image alignleft size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"308\" src=\"https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-multiple-auger-choices.jpg\" alt=\"How industry expertise ensures correct flexible screw conveyor\" class=\"wp-image-1414\" srcset=\"https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-multiple-auger-choices.jpg 400w, https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-multiple-auger-choices-300x231.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><figcaption><strong>Multiple Auger Choices<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:65%\">\n<p>As part of the specification process, an experienced conveyor manufacturer will perform a material flow analysis\u2014which is the best way to determine effective flow from the hopper through the conveyor\u2014as well as measure the bulk density and ask about convey rates.<\/p>\n\n\n\n<p>Once the exact product is determined and a flow analysis is completed, an experienced equipment provider will then identify the type of screw that will be most effective in the conveyor (flat wire, round wire, beveled and heavy-duty square bar).<\/p>\n\n\n\n<p>After these fundamental conveyor configurations issues are nailed down, greatly improved performance can be achieved by considering a number of additional factors:<\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Pickup Angle Affects Efficiency and FIll Factor<\/h2>\n\n\n\n<p>One universal design consideration with <a title=\"Helix Flexible Screw Conveyor | Hapman.com\" href=\"\/equipment-and-systems\/conveyors\/helix-flexible-screw-conveyor\/\" target=\"_blank\" rel=\"noopener noreferrer\">flexible screw conveyors<\/a> is the pickup angle, the angle from horizontal at which the conveyor body operates. 45 degrees is a common pickup angle that strikes a good balance between operating efficiency and space requirements. Above 45 degrees, operating efficiency goes down; it\u2019s generally not recommended to run very heavy materials at angles greater than 45 degrees. Conversely, angles shallower than 45 degrees allow higher efficiency and increased convey rates.<\/p>\n\n\n\n<p>However, pickup angle is about more than just simple operating efficiency. It\u2019s also about how efficiently the auger inlet is filled with material. This \u201cFill Factor\u201d has a direct impact on convey rates, or whether the conveyor will work at all. The steeper the pickup angle, the lower the fill factor and convey rate. Shallower angles yield higher fill factors, but very high factors approaching 100% can lead to jams; in these cases, alternate screw designs can be employed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fill Factors vs. Pickup Angles for Typical Flexible Screw Conveyors<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\"><strong>Pickup Angle<\/strong><\/th><th class=\"has-text-align-left\" data-align=\"left\"><strong>Fill Factor<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">30<sup>o<\/sup><\/td><td class=\"has-text-align-left\" data-align=\"left\">80-95%<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">45<sup>o<\/sup><\/td><td class=\"has-text-align-left\" data-align=\"left\">75-90%<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">60<sup>o<\/sup><\/td><td class=\"has-text-align-left\" data-align=\"left\">70-85%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Avoiding Flanged Inlet Pitfalls<\/h2>\n\n\n\n<p>Flanged small-inlet feeders are sometimes used in place of a hopper to supply the screw conveyor. Depending on the material being conveyed, this practice can lead to trouble. <a title=\"Helix Flexible Screw Conveyor | Hapman.com\" href=\"\/equipment-and-systems\/conveyors\/helix-flexible-screw-conveyor\/\" target=\"_blank\" rel=\"noopener noreferrer\">Flexible screw conveyors<\/a> require material headload on the auger for good elevation. Light or easily-fluidized materials may not be able to deliver enough headload in flanged inlet systems, and consequently run poorly in the auger, especially at steeper pickup angles. For these materials, full-sized hoppers are a better bet. By design, they provide more headload and also offer enough space to include agitators that assure consistent auger loading.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Strategies for Difficult-to-Convey Materials<\/h2>\n\n\n\n<p>The physical properties of some bulk materials can cause problems in flexible screw conveying. Fortunately, there are workarounds for many of them.<\/p>\n\n\n\n<p><strong>Use a center core for heavy or fluidizable materials.<\/strong> Under mechanical agitation, materials like talc, dry dusty flours or starches tend to fluidize and cause fallback in standard open screw designs, especially with relatively low auger walls. Adding a center core reduces the amount of material being conveyed, provides better material containment and reduces the load imposed on the screw, which can dramatically improve elevation performance.<\/p>\n\n\n\n<p><strong>Prevent zinc oxide buildup.<\/strong> Widely used in many industries, zinc oxide is extremely sensitive to buildup on machinery, including conveyors with flat screw designs. Beveled screws are a better choice for zinc oxide; they have a trailing edge scraper that removes buildup and maintains a free-working casing.<\/p>\n\n\n\n<p><strong>Stay on the straight and narrow with abrasive materials.<\/strong> Heavy abrasive materials like salt or sand are likely to cause extra wear and tear at bends or flexes in conveyor runs. When confined in small spaces, these types of particles can interlock and exacerbate wear problems. When handling abrasive materials, it\u2019s best to plan straight conveyor runs to head off trouble.<\/p>\n\n\n\n<p><strong>Use agitation to manage materials that pack or agglomerate.<\/strong> Some materials require mechanical agitation to flow properly in hoppers or other auger loading spaces. Any material that can be compacted into a \u201csnowball\u201d is likely to require agitation. Materials that contain oils, such as pancake mixes, nacho seasonings or cheddar seasonings are often troublesome. Materials with \u201coxide\u201d in their names, like iron oxide or titanium dioxide, tend to flow sluggishly. Calcium carbonate is another very common material with flow issues.<\/p>\n\n\n\n<p>Hoppers with pin or ribbon-style agitators or vibratory systems prevent these sorts of materials from ratholing or bridging at auger inlets. Many agitators are available with easily-interchangeable pins or ribbons to achieve ideal flow performance for a given material. And, there are many options for retrofitting existing hoppers with agitators.<\/p>\n\n\n\n<p>While a complete ribbon-agitated hopper might cost approximately $6,000, retrofit agitators can be added to an existing hopper for about $2,000 \u2013 money well-spent to keep an operation running smoothly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Plan for Easy, Thorough Conveyor Cleanout<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>By their nature, bulk solids and powders will inevitably leave some residue in conveyors. To help manufacturers maintain maximum process uptime, flexible screw conveyors should be designed with features that allow fast, easy disassembly, cleanout and reassembly between production runs.<\/p>\n\n\n\n<p>As an example, Hapman\u2019s Hi\/Lo design allows for easy screw removal, cleanout and\/or changeout from floor level is particularly helpful. Internal spaces should be free of crevices or other spaces that might trap particles or slow cleaning operations. This is particularly important when handling materials like potential food allergens or contamination- sensitive chemicals.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"483\" src=\"https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-hi-lo.jpg\" alt=\"flexible screw conveyor hi-lo\" class=\"wp-image-1415\" srcset=\"https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-hi-lo.jpg 600w, https:\/\/hapman.com\/wp-content\/uploads\/2022\/07\/HX2000-hi-lo-300x242.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption><strong>Speed up the cleaning process with a Hi\/Lo<\/strong><\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Look for Ample Equipment Options and Speedy, Predictable Delivery<\/h2>\n\n\n\n<p>The number of custom options a conveyor manufacturer offers is directly proportional to its level of expertise. The longer an equipment provider has been in business, the more solutions it offers due to a history of working with a large number of other customers and applications.<\/p>\n\n\n\n<p>For example, not all manufacturers offer heavier-duty screws or nominal case diameters in odd sizes such as 2, 2<sup>\u00bd<\/sup>, 3 and 5 inches. Also, while many manufacturers advertise expedited delivery times, they aren\u2019t specific about the timeframe or don\u2019t apply the policy to custom sizes or engineered equipment. Knowing up-front that a conveyor will be delivered in the exact size and by the exact date needed is crucial to minimizing unexpected downtime.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>In order to minimize downtime in material handling, a company should focus on specifying the right equipment with the help of an expert material handling equipment partner. An experienced conveyor manufacturer will understand the importance of proper operation at initial start-up and will ask all of the right questions up-front to achieve that goal. It is imperative that that the customer be forthcoming will all of the pertinent information as well, but just as there are no shortcuts to equipment selection, there is no substitute for industry expertise when it comes to being confident about arriving at an ideal bulk material conveying solution.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Most if not all manufacturing operations that deal with bulk materials will agree that downtime and loss of production are at the top of their list of process concerns. Downtime in a bulk material handling operation can usually be traced to the equipment that moves the material throughout the process. Flexible screw conveyors are [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":3325,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11],"tags":[15,27],"post_products":[41],"post_industries":[],"post_solutions":[],"class_list":["post-1107","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-expertise","tag-helix-flexible-screw-conveyor","tag-white-papers","post_products-helix-flexible-screw-conveyor"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Industry Expertise Ensures Correct Flexible Screw Conveyor Selection and Process Uptime - Hapman<\/title>\n<meta name=\"description\" content=\"Introduction Most if not all manufacturing operations that deal with bulk materials will agree that downtime and loss of production are at the top of their...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hapman.com\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Industry Expertise Ensures Correct Flexible Screw Conveyor Selection and Process Uptime - Hapman\" \/>\n<meta property=\"og:description\" content=\"Introduction Most if not all manufacturing operations that deal with bulk materials will agree that downtime and loss of production are at the top of their list of process concerns. 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Flexible screw conveyors are [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hapman.com\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\/\" \/>\n<meta property=\"og:site_name\" content=\"Hapman\" \/>\n<meta property=\"article:published_time\" content=\"2019-04-24T14:04:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-30T19:04:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hapman.com\/wp-content\/uploads\/2019\/04\/Helix-800-and-Standard-Models-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"2194\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"devteam\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"devteam\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/hapman.com\\\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hapman.com\\\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\\\/\"},\"author\":{\"name\":\"devteam\",\"@id\":\"https:\\\/\\\/hapman.com\\\/#\\\/schema\\\/person\\\/00525580c90620340316c86906c8061d\"},\"headline\":\"How Industry Expertise Ensures Correct Flexible Screw Conveyor Selection and Process Uptime\",\"datePublished\":\"2019-04-24T14:04:16+00:00\",\"dateModified\":\"2022-09-30T19:04:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/hapman.com\\\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\\\/\"},\"wordCount\":1545,\"publisher\":{\"@id\":\"https:\\\/\\\/hapman.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/hapman.com\\\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hapman.com\\\/wp-content\\\/uploads\\\/2019\\\/04\\\/Helix-800-and-Standard-Models-scaled.jpg\",\"keywords\":[\"Helix Flexible Screw Conveyor\",\"White Papers\"],\"articleSection\":[\"Application Expertise\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/hapman.com\\\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\\\/\",\"url\":\"https:\\\/\\\/hapman.com\\\/white-paper-how-industry-expertise-ensures-correct-flexible-screw-conveyor-selection-and-process-uptime\\\/\",\"name\":\"How Industry Expertise Ensures Correct Flexible Screw Conveyor Selection and Process Uptime - 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Downtime in a bulk material handling operation can usually be traced to the equipment that moves the material throughout the process. 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