{"id":394,"date":"2024-04-12T11:52:28","date_gmt":"2024-04-12T09:52:28","guid":{"rendered":"https:\/\/corona1.eu\/en\/?page_id=394"},"modified":"2025-04-11T12:22:54","modified_gmt":"2025-04-11T10:22:54","slug":"melt-pumps-extru","status":"publish","type":"page","link":"https:\/\/corona1.eu\/en\/witte-chemical-pumps\/melt-pumps-extru\/","title":{"rendered":"Melt pumps [EXTRU]"},"content":{"rendered":"\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Melt pumps for extrusion<\/h2>\n\n\n\n<p>The extrusion gear pump is mainly used in connection with extruders or kneaders. They lower the naturally existing pulsation and uneven transportation, particularly of single-screw extruders.<\/p>\n\n\n\n<p>The extrusion pump is also used as a melt pump. It takes over the establishment of the required transport pressure, which is needed for the downstream equipment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Efficient pressure build-up<\/h2>\n\n\n\n<p>In the gear pump, the pressure build-up occur significantly more efficiently than in the extruder itself. The extruder is relieved through the use of an extrusion pump. Significantly less energy or heat is added to the polymer. The melt pump thereby contributes to the gentlest possible transportation. The EXTRU pump is indispensable for the production of precise foils or micro-granulate.<\/p>\n\n\n\n<p><strong>Design examples for melt pumps [EXTRU]<\/strong><\/p>\n\n\n<div class=\"pgc-sgb-cb wp-block-pgcsimplygalleryblock-grid \" data-gallery-id=\"5c932408\"><div class=\"sgb-preloader\" id=\"pr_5c932408\">\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div>\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div>\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div>\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div><\/div><div class=\"simply-gallery-amp pgc_sgb_slider \"><noscript><div class=\"sgb-gallery\"><div class=\"sgb-item\"><a href=\"https:\/\/corona1.eu\/?attachment_id=4095\" target=\"_blank\"><img decoding=\"async\" alt=\"Melt pump with customized design\" width=\"295\" height=\"300\" loading=\"lazy\" src=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXT_M_meltpump_20fe8ea638-295x300.png\" srcset=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXT_M_meltpump_20fe8ea638-295x300.png 295w,https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXT_M_meltpump_20fe8ea638.png 756w\" sizes=\"auto, 250px\"\/><\/a><\/div><div class=\"sgb-item\"><a href=\"https:\/\/corona1.eu\/?attachment_id=4096\" target=\"_blank\"><img decoding=\"async\" alt=\"Melt pump for quick color change\" width=\"298\" height=\"300\" loading=\"lazy\" src=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXTRU_II_QCC_1000x1000_2ea23abf91-298x300.png\" srcset=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXTRU_II_QCC_1000x1000_2ea23abf91-298x300.png 298w,https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXTRU_II_QCC_1000x1000_2ea23abf91.png 762w\" sizes=\"auto, 250px\"\/><\/a><\/div><div class=\"sgb-item\"><a href=\"https:\/\/corona1.eu\/?attachment_id=4097\" target=\"_blank\"><img decoding=\"async\" alt=\"Melt pump in square design\" width=\"300\" height=\"263\" loading=\"lazy\" src=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42-300x263.jpg\" srcset=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42-300x263.jpg 300w,https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42.jpg 768w\" sizes=\"auto, 250px\"\/><\/a><\/div><div class=\"sgb-item\"><a href=\"https:\/\/corona1.eu\/?attachment_id=4098\" target=\"_blank\"><img decoding=\"async\" alt=\"Melt pump in a round design\" width=\"300\" height=\"300\" loading=\"lazy\" src=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c-300x300.png\" srcset=\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c-300x300.png 300w,https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c.png 768w\" sizes=\"auto, 250px\"\/><\/a><\/div><\/div><\/noscript><\/div><script type=\"application\/json\" class=\"sgb-data\">{\"collectionColumns\":4,\"collectionThumbRecomendedWidth\":150,\"captions\":false,\"captionSrc\":\"alt\",\"collectionthumbHoverTitleFontSize\":10,\"collectionThumbSubMenuDownload\":false,\"collectionThumbSubMenuShare\":false,\"galleryType\":\"pgc_sgb_grid\",\"galleryId\":\"5c932408\",\"images\":[{\"id\":4095,\"title\":\"csm_0314_EXT_M_meltpump_20fe8ea638\",\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXT_M_meltpump_20fe8ea638.png\",\"link\":\"https:\/\/corona1.eu\/?attachment_id=4095\",\"alt\":\"Melt pump with customized 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pump for quick color change\",\"description\":\"\",\"caption\":\"\",\"mime\":\"image\/png\",\"type\":\"image\",\"width\":762,\"height\":768,\"sizes\":{\"thumbnail\":{\"height\":150,\"width\":150,\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXTRU_II_QCC_1000x1000_2ea23abf91-150x150.png\",\"orientation\":\"landscape\"},\"medium\":{\"height\":300,\"width\":298,\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXTRU_II_QCC_1000x1000_2ea23abf91-298x300.png\",\"orientation\":\"portrait\"},\"full\":{\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_0314_EXTRU_II_QCC_1000x1000_2ea23abf91.png\",\"height\":768,\"width\":762,\"orientation\":\"portrait\"}},\"imageMeta\":{\"aperture\":\"0\",\"credit\":\"\",\"camera\":\"\",\"caption\":\"\",\"created_timestamp\":\"0\",\"copyright\":\"\",\"focal_length\":\"0\",\"iso\":\"0\",\"shutter_speed\":\"0\",\"title\":\"\",\"orientation\":\"0\",\"keywords\":[]},\"meta\":false,\"postlink\":\"https:\/\/corona1.eu\/?attachment_id=4096\"},{\"id\":4097,\"title\":\"csm_WITTE_EXTRU_TOTAL_34b4938e42\",\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42.jpg\",\"link\":\"https:\/\/corona1.eu\/?attachment_id=4097\",\"alt\":\"Melt pump in square design\",\"description\":\"\",\"caption\":\"\",\"mime\":\"image\/jpeg\",\"type\":\"image\",\"width\":768,\"height\":672,\"sizes\":{\"thumbnail\":{\"height\":150,\"width\":150,\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42-150x150.jpg\",\"orientation\":\"landscape\"},\"medium\":{\"height\":263,\"width\":300,\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42-300x263.jpg\",\"orientation\":\"landscape\"},\"full\":{\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRU_TOTAL_34b4938e42.jpg\",\"height\":672,\"width\":768,\"orientation\":\"landscape\"}},\"imageMeta\":{\"aperture\":\"0\",\"credit\":\"\",\"camera\":\"\",\"caption\":\"\",\"created_timestamp\":\"0\",\"copyright\":\"\",\"focal_length\":\"0\",\"iso\":\"0\",\"shutter_speed\":\"0\",\"title\":\"\",\"orientation\":\"1\",\"keywords\":[]},\"meta\":false,\"postlink\":\"https:\/\/corona1.eu\/?attachment_id=4097\"},{\"id\":4098,\"title\":\"csm_WITTE_EXTRUII_meltpump_723837df1c\",\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c.png\",\"link\":\"https:\/\/corona1.eu\/?attachment_id=4098\",\"alt\":\"Melt pump in a round design\",\"description\":\"\",\"caption\":\"\",\"mime\":\"image\/png\",\"type\":\"image\",\"width\":768,\"height\":768,\"sizes\":{\"thumbnail\":{\"height\":150,\"width\":150,\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c-150x150.png\",\"orientation\":\"landscape\"},\"medium\":{\"height\":300,\"width\":300,\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c-300x300.png\",\"orientation\":\"landscape\"},\"full\":{\"url\":\"https:\/\/corona1.eu\/wp-content\/uploads\/2024\/02\/csm_WITTE_EXTRUII_meltpump_723837df1c.png\",\"height\":768,\"width\":768,\"orientation\":\"landscape\"}},\"imageMeta\":{\"aperture\":\"0\",\"credit\":\"\",\"camera\":\"\",\"caption\":\"\",\"created_timestamp\":\"0\",\"copyright\":\"\",\"focal_length\":\"0\",\"iso\":\"0\",\"shutter_speed\":\"0\",\"title\":\"\",\"orientation\":\"0\",\"keywords\":[]},\"meta\":false,\"postlink\":\"https:\/\/corona1.eu\/?attachment_id=4098\"}],\"itemsMetaDataCollection\":[{\"link\":\"\",\"linkTarget\":\"_self\",\"linkText\":\"\",\"tags\":[],\"id\":4095}]}<\/script><script>(function(){if(window.PGC_SGB && window.PGC_SGB.searcher){window.PGC_SGB.searcher.initBlocks()}})()<\/script><\/div>\n\n\n<h2 class=\"wp-block-heading\">Robust and flexible<\/h2>\n\n\n\n<p>The robust design and wear-resistant materials make the EXTRU indispensable for&nbsp;extrusion. It can also be used to transport&nbsp;natural rubber&nbsp;and soft PVC through different special designs.<\/p>\n\n\n\n<p>The WITTE&nbsp;fast-changing color design&nbsp;is perfect for master batch applications with frequently changing colors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages:<\/h2>\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=\"Copy - Boosterpumps\" frameborder=\"0\" width=\"1200\" height=\"675\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" src=\"https:\/\/view.genial.ly\/65cc8b0b44027c0014bae4dc\" 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><strong>Housing<\/strong><\/td><td>Heat-resistant carbon steel, for example, 1.6582 \u00b7 Stainless steel 1.4313 \u00b7 optional with coating \u00b7 optional with coating<\/td><\/tr><tr><td><strong>Gear Shafts<\/strong><\/td><td>Tool steel \u00b7 Nitriding steel \u00b7 Special steel \u00b7 optional with coating \u00b7 Helical gearing \u00b7 Herringbone gearing (for transportation with very low pulsation)<\/td><\/tr><tr><td><strong>Shaft seals<\/strong><\/td><td>Threaded shaft seal \u00b7 Stuffing box<\/td><\/tr><tr><td><strong>Heating<\/strong><\/td><td>Electric through heating cartridges \u00b7 Cover heating optional<\/td><\/tr><tr><td><strong>Friction bearing<\/strong><\/td><td>Tool steel \u00b7 NiAG (nickel-silver) \u00b7 Aluminum 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><strong>Viscosity<\/strong><\/td><td>Up to 40.000.000 mPas<\/td><\/tr><tr><td><strong>Temperature<\/strong><\/td><td>Up to 400\u00b0C<\/td><\/tr><tr><td><strong>Suction pressure<\/strong><\/td><td>Vacuum up to max. 120 bar<\/td><\/tr><tr><td><strong>Transport pressure \/ differential pressure<\/strong><\/td><td>Up to 250 bar. Special designs also for higher differential pressures<\/td><\/tr><tr><td><strong>Pump sizes<\/strong><\/td><td>From 4,7-22-22 (4,7 cm3\/U \u2013 10 kg\/h) to 12.000-280-280 (12.000 ccm\/U). Sizes with smaller gears for higher differential pressures are possible, p.e. 690-140-90.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Application examples for WITTE melt pumps from the EXTRU series<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-small-font-size\"><table><tbody><tr><td>Plastics<\/td><td>PS \u00b7 PET \u00b7 PVC \u00b7 PC \u00b7 PMMA \u00b7 HDPE \u00b7 LDPE \u00b7 LLDPE \u00b7 PP \u00b7 PEEK \u00b7 POLYSULFONS \u00b7 LICORICE \u00b7 CHEWING GUM<\/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\">Indsutries<\/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=\"6c13b5a3-41b8-457f-8868-312aff17f900\" data-name=\"Ebene 1\" height=\"80\"\n                    xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 32.11 32.11\" preserveAspectRatio=\"xMinYMid\">\n                    <title>WITTE_ICONS<\/title>\n                    <path class=\"05e755a6-807a-4eb9-8d33-63b5bbdba104\"\n                        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\">\n                    <\/path>\n                    <path class=\"05e755a6-807a-4eb9-8d33-63b5bbdba104\"\n                        d=\"M16.06,12.64a3.42,3.42,0,1,0,3.41,3.41A3.42,3.42,0,0,0,16.06,12.64Zm2.4,3.41a2.41,2.41,0,1,1-2.4-2.4A2.41,2.41,0,0,1,18.46,16.05Z\">\n                    <\/path>\n                    <path class=\"05e755a6-807a-4eb9-8d33-63b5bbdba104\"\n                        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                   <\/path>\n                <\/svg>\n            <\/i>\n        <\/div><!-- \/.service__icon -->\n        <h4 class=\"service__title\">Extrusion<\/h4>\n        <p class=\"service__desc\">Gear pumps for extrusion<\/p>\n        <!--<a href=\"https:\/\/corona1.eu\/ekstruzja\/\" class=\"btn btn__secondary btn__link\">\n            <i class=\"icon-arrow-right arrow-rounded\"><\/i>\n            <span>Czytaj wi\u0119cej<\/span>\n        <\/a>-->\n    <\/div><!-- \/.service-content -->\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"pgc-sgb-cb wp-block-pgcsimplygalleryblock-slider \" data-gallery-id=\"24d34180\"style=&quot;min-height:400px&quot;><div class=\"sgb-preloader\" id=\"pr_24d34180\">\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div>\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div>\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div>\n\t<div class=\"sgb-square\" style=\"background:#d4d4d4\"><\/div><\/div><div class=\"simply-gallery-amp pgc_sgb_slider \"><noscript><div class=\"sgb-gallery\"><div class=\"sgb-item\"><a href=\"https:\/\/corona1.eu\/en\/?attachment_id=398\" target=\"_blank\"><img decoding=\"async\" alt=\"\" width=\"300\" height=\"188\" loading=\"lazy\" src=\"https:\/\/corona1.eu\/en\/wp-content\/uploads\/sites\/2\/2024\/04\/csm_IMG_9121_36be9c4110-1024x640-1-300x188.jpeg\" srcset=\"https:\/\/corona1.eu\/en\/wp-content\/uploads\/sites\/2\/2024\/04\/csm_IMG_9121_36be9c4110-1024x640-1-300x188.jpeg 300w,https:\/\/corona1.eu\/en\/wp-content\/uploads\/sites\/2\/2024\/04\/csm_IMG_9121_36be9c4110-1024x640-1.jpeg 1024w\" sizes=\"auto, 250px\"\/><\/a><\/div><div class=\"sgb-item\"><a href=\"https:\/\/corona1.eu\/en\/?attachment_id=399\" target=\"_blank\"><img decoding=\"async\" alt=\"\" width=\"300\" height=\"188\" loading=\"lazy\" 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