{"id":4245,"date":"2026-10-05T14:52:35","date_gmt":"2026-10-05T11:52:35","guid":{"rendered":"https:\/\/www.filtresistemleri.com\/?post_type=product&#038;p=4245"},"modified":"2026-10-15T13:51:14","modified_gmt":"2026-10-15T10:51:14","slug":"radial-fan","status":"publish","type":"product","link":"https:\/\/www.filtresistemleri.com\/en\/radial-fan\/","title":{"rendered":"Radial Fan"},"content":{"rendered":"<h2>What Is a Radial Fan?<\/h2>\n<p>A radial fan is a centrifugal fan whose impeller blades are straight and set perpendicular to the shaft axis. Because the blades are neither forward- nor backward-inclined, there is no surface on which dust can accumulate.<\/p>\n<p>In the industry, the term radial fan is used in two senses. In the narrow sense it describes a straight-bladed impeller, and in the broad sense it refers to the entire centrifugal group with spiral housings. When abrasive dust is involved, it always means the straight-bladed design.<\/p>\n<h2>Radial Fan Working Principle<\/h2>\n<p>Air enters the housing at the center and is directed between the blades of the rotating impeller. The straight blades throw the air outward without imparting any angle, and this motion increases pressure.<\/p>\n<p>The flat blade surface creates a self-cleaning effect. Particles that strike the blade cannot cling to the surface and are thrown off by centrifugal force. On inclined blades, these particles collect in the blade pockets, upset the balance and eventually cause vibration. This mechanism lowers the efficiency of the radial fan somewhat, but in return it delivers a unit that runs without clogging.<\/p>\n<h2>What Are the Features of Radial Fans?<\/h2>\n<p>Radial fan specifications are the technical data that determine which line a unit can operate on. All of this data is provided together at the quotation stage.<\/p>\n<ul>\n<li><strong>Radial fan blade design<\/strong>: straight, non-inclined blades eliminate the surface where dust builds up<\/li>\n<li><strong>Motor power and speed<\/strong>: ensure that airflow and pressure are delivered together<\/li>\n<li><strong>Airflow and static pressure<\/strong>: the two key values that define the actual requirement of the line<\/li>\n<li><strong>Housing sheet thickness<\/strong>: directly determines unit life when handling abrasive dust<\/li>\n<li><strong>Wear plates<\/strong>: a replaceable protective layer on blade and housing surfaces<\/li>\n<\/ul>\n<p>To size the radial fan motor, airflow multiplied by static pressure is divided by fan efficiency. Since doubling the speed increases the power requirement eightfold, the radial fan motor is determined by calculation, not oversized by guesswork. The technical data sheet also lists operating temperature and maximum speed among the radial fan specifications; if these two values are exceeded, the warranty becomes void.<\/p>\n<h2>Radial Fan Types<\/h2>\n<p>Radial fans are classified by the pressure they generate and the number of blades. The resistance of the line and the cleanliness of the air determine which type is suitable.<\/p>\n<div style=\"overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse;\">\n<tbody>\n<tr>\n<th style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left; background: #f5f5f5;\">Type<\/th>\n<th style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left; background: #f5f5f5;\">Blade Design<\/th>\n<th style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left; background: #f5f5f5;\">Air Handled<\/th>\n<th style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left; background: #f5f5f5;\">Pressure Range<\/th>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Low pressure<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Few straight blades<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Clean, low dust<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Low<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Multi-blade<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Many short blades<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Clean air<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Low \u2013 medium<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Industrial straight-blade<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Thick, wide straight blades<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Abrasive and sticky dust<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Medium \u2013 high<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">In-line duct type<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Straight blades, compact housing<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Moderately dusty air<\/td>\n<td style=\"border: 1px solid #e5e5e5; padding: 12px; text-align: left;\">Medium<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Housing shape is another distinguishing factor. In-line radial fan models connected in series within the duct run provide pressure support at intermediate points, while mini radial fan units handle extraction for a single machine. Whichever type is chosen, the impeller material is specified at the radial fan manufacturing stage according to the character of the dust.<\/p>\n<h3>Low Pressure Radial Fans<\/h3>\n<p>Low pressure radial fans are used on short duct runs and in low-resistance applications. They move high airflow with little energy.<\/p>\n<p>Area ventilation, fume extraction and short transfer lines are the domain of this group. A low pressure radial fan is not sufficient on its own in filter-connected systems, because filter resistance quickly reduces airflow.<\/p>\n<h3>Multi-Blade Radial Fans<\/h3>\n<p>A multi-blade radial fan consists of many short blades and runs at low speed. Low speed translates directly into low noise.<\/p>\n<p>It performs well with clean air, but it is not preferred on dusty lines because the spaces between the blades can fill up. For this reason, multi-blade radial fans are typically found in area ventilation and air handling units.<\/p>\n<h3>Industrial Radial Fans<\/h3>\n<p>The industrial radial fan is the type built from heavy-gauge sheet steel for heavy-duty conditions and fitted with a straight-bladed impeller. It is the solution for lines where abrasive, sticky and fibrous dust passes directly through the fan.<\/p>\n<p>Impeller thickness is increased, wear plates are added to the blade surfaces and the housing is reinforced. These measures significantly extend the life of an industrial radial fan. The bearing housings are mounted outside the casing to protect them from hot gas.<\/p>\n<h2>Radial Fan Applications<\/h2>\n<p>The radial fan stands out on any line where the air is not clean. Because its blade design lets dust pass through, it can also be positioned upstream of the filter.<\/p>\n<ul>\n<li><strong>Abrasive dust<\/strong>: lines carrying sand, slag and cement particles<\/li>\n<li><strong>Sticky dust<\/strong>: extraction lines with moist and oily particles<\/li>\n<li><strong>Fibrous material<\/strong>: long particles from textile and wood processing<\/li>\n<li><strong>Chips and splinters<\/strong>: pneumatic conveying of coarse material<\/li>\n<li><strong>Hot gas<\/strong>: air that remains at high temperature after cooling<\/li>\n<li><strong>Upstream of the filter<\/strong>: layouts where dust has to pass through the fan<\/li>\n<\/ul>\n<p>Mini radial fan models are built on the same blade principle; the only difference is housing size and motor power. In-line radial fans, on the other hand, are installed at intermediate points on long lines where pressure drops.<\/p>\n<h2>Where Are Radial Fans Used?<\/h2>\n<p>Foundries are where this fan is used most intensively. Sand and slag particles wear out other blade types in a short time.<\/p>\n<ul>\n<li><strong>Foundry<\/strong>: sand screening and post-casting cleaning lines<\/li>\n<li><strong>Cement and lime<\/strong>: clinker grinding and packing sections<\/li>\n<li><strong>Recycling<\/strong>: extraction points of shredders and separators<\/li>\n<li><strong>Textiles<\/strong>: fiber capture on carding and cutting machines<\/li>\n<li><strong>Woodworking<\/strong>: conveying sanding dust and sawdust<\/li>\n<li><strong>Metalworking<\/strong>: extraction of grinding dust and welding fumes<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.filtresistemleri.com\/jet-pulse-torbali-filtre\/\">Jet Pulse Bag Filter<\/a> lines usually have the fan placed after the filter, while in layouts where dust has to pass through the fan, a <a href=\"https:\/\/www.filtresistemleri.com\/siklonlar-siklon-filtre\/\">pre-separator cyclone<\/a> is added upstream to separate out coarse particles.<\/p>\n<h2>Radial Fan Calculation<\/h2>\n<p>The radial fan calculation starts with the total airflow of the extraction points. For each machine, the capture velocity is multiplied by the hood cross-section, and the results are added up.<\/p>\n<p>In the second step, the pressure loss of the duct run is determined. Elbows, reductions and filter resistance are added to this total, and on lines carrying abrasive dust the dirty filter value is used as the basis. Once the radial fan calculation is complete, airflow and static pressure are plotted on the fan curve, and the point where it intersects the system resistance curve gives the actual operating point.<\/p>\n<h2>Radial Fan Design<\/h2>\n<p>Radial fan design cannot be done without knowing what dust the line will carry. A dust sample is taken from the facility, and particle hardness and moisture content are determined in the laboratory. A radial fan design prepared without measurement leads either to insufficient capacity or to unnecessary energy consumption on site.<\/p>\n<p>Radial fan blade design is shaped by this data. As abrasiveness increases, the number of blades is reduced and blade thickness is increased, while for sticky dust the gap between the blades is widened. The housing material is mild steel under normal conditions and stainless steel where there is a risk of corrosion. After production, the impeller is dynamically balanced, and the balancing report is just as decisive as the radial fan blade design.<\/p>\n<h2>Radial Fan Prices<\/h2>\n<p>It is not possible to give a single figure for radial fan prices, because each unit is built to the specific data of its line. Airflow, static pressure, motor power, sheet thickness and the use of wear plates are the main cost items. Even at the same airflow, radial fan prices vary significantly depending on the sheet thickness of the unit.<\/p>\n<p>Units built for abrasive dust cost more than standard models because they require heavy-gauge sheet and a reinforced housing. On the other hand, the longer impeller life brings the total cost of ownership down. When comparing radial fan manufacturers, sheet thickness and the balancing report should be requested separately from the technical data sheet. Warranty period and spare impeller lead time should also be compared among radial fan manufacturers. When you fill out our <a href=\"https:\/\/www.filtresistemleri.com\/teklif-al\/\">quote request form<\/a> with the airflow and pressure data of your line, we prepare a price specific to your project.<\/p>\n<h2>Radial Fan Maintenance and Inspection<\/h2>\n<p>On lines carrying abrasive dust, maintenance intervals are kept short. Wear on the impeller surface upsets the balance and causes vibration.<\/p>\n<p>Impeller cleaning and wear plate inspection are carried out every three months, and bearing noise and temperature are monitored over the same period. Motor current is measured monthly, as rising current often indicates a fouled impeller. Vibration measurement gives the earliest warning, and when the value rises a balance check should be carried out without delay. On belt-driven models, belt tension is added to the same list. On spiral-housing <a href=\"https:\/\/www.filtresistemleri.com\/salyangoz-fan\/\">centrifugal scroll fan<\/a> models, the maintenance interval can be shortened further depending on dust concentration.<\/p>\n<h2>Frequently Asked Questions About Radial Fans<\/h2>\n<h3>What types of dust are radial fans used to convey?<\/h3>\n<p>They are used on lines carrying abrasive, sticky and fibrous dust. Because the straight blade design prevents particles from building up on the blades, sand, slag, wood chips and moist dust pass through this fan without problems.<\/p>\n<h3>How is radial fan capacity determined?<\/h3>\n<p>Capacity is found by calculating the total airflow of the extraction points together with the pressure loss of the duct run. The simultaneous operation ratio is also taken into account; otherwise the unit ends up oversized.<\/p>\n<h3>How is radial fan motor power selected?<\/h3>\n<p>Motor power is selected after the calculated airflow and static pressure values are placed on the fan curve. A protection class is added according to ambient conditions, and explosion-proof motors are used on lines carrying explosive dust.<\/p>\n<h3>Why is blade design important in radial fans?<\/h3>\n<p>Blade design directly determines what kind of air the fan can handle. Straight blades do not let dust build up, whereas on inclined blades accumulation upsets the balance and soon leads to vibration and loss of efficiency.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A radial fan is a type of centrifugal fan whose straight-bladed impeller moves abrasive and sticky dust without letting it build up. It is the equipment that keeps running on lines where other blade shapes clog.<\/p>\n<p>At FLTS, we manufacture radial fans for foundries, cement plants and recycling facilities. Housing thickness and wear surfaces are specified according to the dust characteristics of each facility.<\/p>\n","protected":false},"featured_media":4062,"template":"","meta":[],"product_brand":[],"product_cat":[129],"product_tag":[],"class_list":["post-4245","product","type-product","status-publish","has-post-thumbnail","product_cat-dust-collection-systems","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/product\/4245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/media\/4062"}],"wp:attachment":[{"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/media?parent=4245"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/product_brand?post=4245"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/product_cat?post=4245"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.filtresistemleri.com\/en\/wp-json\/wp\/v2\/product_tag?post=4245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}