{"id":285,"date":"2024-02-08T11:26:16","date_gmt":"2024-02-08T10:26:16","guid":{"rendered":"https:\/\/corona1.eu\/en\/?page_id=285"},"modified":"2025-04-11T09:58:42","modified_gmt":"2025-04-11T07:58:42","slug":"discharge-pumps-poly","status":"publish","type":"page","link":"https:\/\/corona1.eu\/en\/witte-chemical-pumps\/discharge-pumps-poly\/","title":{"rendered":"Discharge pumps [POLY]"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Polymer discharge pumps<\/h2>\n\n\n\n<p>Reliable and robust pumps are needed to empty reactors and containers particularly during the&nbsp;<strong>polymerization process<\/strong>&nbsp;The pumps transport the melt throughout the process. The highly viscous material must be transported from a reactor under vacuum. Discharge pumps from the POLY series from WITTE are specifically created for this task. The customer can choose between a standard design or an individual design according to their requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Discharge pumps for polymerization production<\/h2>\n\n\n\n<p>These pumps achieve the best efficiency through optimized shaft and bearing geometry. The need for energy is kept low allowing the operating costs to be optimized. The POLY is offered in different variations. Versions with classic or shortened inlet geometries are just as possible as versions in the LowNPSH Design.<\/p>\n\n\n\n<p>Pumps with shortened inlets guarantee the quick feed of melt to the gear pumps. All POLY discharge pumps have the largest possible inlet openings with optimized flow geometry to avoid increased friction, decelerated inlet of the medium into the pumps as well as to reduce additional heat input. Different material combinations make these pumps reliable partners in the polymer industry, which can also be operated reliably under the most extreme of conditions.<\/p>\n\n\n\n<div style=\"width: 100%;\"><div style=\"position: relative; padding-bottom: 56.25%; padding-top: 0; height: 0;\"><iframe loading=\"lazy\" title=\"Polymer discharge pumps\" frameborder=\"0\" width=\"1200\" height=\"675\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" src=\"https:\/\/view.genial.ly\/65c4b5d54ae8080014447e01\" type=\"text\/html\" allowscriptaccess=\"always\" allowfullscreen=\"true\" scrolling=\"yes\" allownetworking=\"all\"><\/iframe> <\/div> <\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Technical data<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-small-font-size\"><table><tbody><tr><td>Housing<\/td><td>Unalloyed and alloyed steel \u00b7 Cast steel \u00b7 optional with coating<\/td><\/tr><tr><td>Gearwheels<\/td><td>Nitrided steel \u00b7 Tool steel \u00b7 Special steel \u00b7 optional with coating \u00b7 Helical gearing \u00b7 Herringbone gearing<\/td><\/tr><tr><td>Axial shaft seals<\/td><td>(Vacuum) threaded shaft seal \u00b7 Stuffing box \u00b7 Combination of threaded shaft seal and stuffing box \u00b7 double, locked mechanical seal<\/td><\/tr><tr><td>Heating<\/td><td>Heat transfer oil \u00b7 Steam<\/td><\/tr><tr><td>Friction bearings<\/td><td>Tool steel \u00b7 NiAG (nickel-silver) \u00b7 Al bronze \u00b7 Special materials \u00b7 optional with coating<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Operating parameters<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-small-font-size\"><table><tbody><tr><td>Viscosity<\/td><td>Up to 40.000.000 mPas<\/td><\/tr><tr><td>Temperature<\/td><td>Up to 350 \u00b0C<\/td><\/tr><tr><td>Suction pressure<\/td><td>Vacuum up to max. 15 bar<\/td><\/tr><tr><td>Transport pressure \/ differential pressure<\/td><td>Up to 250 bar (4642 psig). The values listed are standard values and must not coincide under certain circumstances. Other values are available upon requests.<\/td><\/tr><tr><td>Pump dimensions<\/td><td>From 4.7-22-22 (4.7 ccm\/rev \u2013 10 kg\/h) to 25,000-360-360 (25,000 ccm\/rev \u2013 52,000 kg\/h). Sizes with wider gear pumps for lower differential pressures are available by default, for example, 3,170-152-254 (3,170 ccm\/rev).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Application examples<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-small-font-size\"><table><tbody><tr><td>Plastics<\/td><td>PET \u00b7 PA \u00b7 PBT \u00b7 PC \u00b7 PS SAN \u00b7 ABS \u00b7 HIPS \u00b7 PP \u00b7 PE \u00b7 POM<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Industries<\/h3>\n\n\n\n<div class=\"service-item\">\n              <div class=\"service__content\">\n                <div class=\"service__icon\">\n                  <i class=\"\">\n<svg id=\"bd7a43cb-e011-45c2-bfaa-08833aaae2a0\" data-name=\"Ebene 1\" height=\"80\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 32.11 32.11\" preserveAspectRatio=\"xMinYMid\"><defs><style>.\\37 f4e6a42-6e24-4a43-8b6f-bd742c77beb5{fill:#e79400;}<\/style><\/defs><title>WITTE_ICONS<\/title><path class=\"7f4e6a42-6e24-4a43-8b6f-bd742c77beb5\" d=\"M28.36,0H3.75A3.75,3.75,0,0,0,0,3.75V28.36a3.75,3.75,0,0,0,3.75,3.75H28.36a3.75,3.75,0,0,0,3.75-3.75V3.75A3.75,3.75,0,0,0,28.36,0ZM31,28.36A2.68,2.68,0,0,1,28.36,31H3.75a2.68,2.68,0,0,1-2.67-2.67V3.75A2.68,2.68,0,0,1,3.75,1.08H28.36A2.68,2.68,0,0,1,31,3.75Z\"\/><path class=\"7f4e6a42-6e24-4a43-8b6f-bd742c77beb5\" d=\"M15.45,20.49a2,2,0,1,0,2,2A2,2,0,0,0,15.45,20.49Zm0,3a1,1,0,1,1,1-1A1,1,0,0,1,15.45,23.49Z\"\/><path class=\"7f4e6a42-6e24-4a43-8b6f-bd742c77beb5\" d=\"M27.33,12.64H20.82a.11.11,0,0,0-.11.11v.82a.11.11,0,0,0,.11.11h.71V22H20.41a7.74,7.74,0,0,0,.23-1.88,8.13,8.13,0,0,0-5.06-7.51V6.85a1.51,1.51,0,0,0-.5-2.94H10a1.51,1.51,0,0,0-.5,2.94V12.6A8.1,8.1,0,1,0,20.09,23h1.44v2.74a2.55,2.55,0,0,0,5.1,0V13.68h.7a.11.11,0,0,0,.11-.11v-.82A.11.11,0,0,0,27.33,12.64ZM22.56,20V13.68h3V20Zm1.52,7.32a1.52,1.52,0,0,1-1.52-1.51V21h3v4.77A1.52,1.52,0,0,1,24.08,27.28ZM10,4.92h5.07a.5.5,0,0,1,.5.5.51.51,0,0,1-.5.51H10a.5.5,0,0,1-.5-.51A.5.5,0,0,1,10,4.92Zm.17,8.51a.51.51,0,0,0,.34-.48v-6h4.05v6a.5.5,0,0,0,.34.48,7.12,7.12,0,0,1,3.44,2.63H6.74A7.12,7.12,0,0,1,10.18,13.43Zm2.36,13.76A7.07,7.07,0,0,1,6.15,17.07H18.93a7,7,0,0,1,.7,3A7.1,7.1,0,0,1,12.54,27.19Z\"\/><\/svg>\n<\/i>\n                <\/div><!-- \/.service__icon -->\n                <h4 class=\"service__title\">Plastic industry<\/h4>\n                <p class=\"service__desc\">Plastics production &#8211; Gear pumps for conveying plastic melts.<\/p>\n                <!--<a href=\"#\" class=\"btn 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":287,"parent":377,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"kg_products_template.php","meta":{"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-285","page","type-page","status-publish","has-post-thumbnail","hentry","category-pumps-witte"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Discharge pumps [POLY] | CORONA Service<\/title>\n<meta name=\"description\" content=\"Pumps for transporting highly viscous materials during polymerization under vacuum. Essential for emptying reactors and containers, ensuring efficient melt movement.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/corona1.eu\/en\/witte-chemical-pumps\/discharge-pumps-poly\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Discharge pumps [POLY] | CORONA Service\" \/>\n<meta property=\"og:description\" content=\"Pumps for transporting highly viscous materials during polymerization under vacuum. 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