{"id":2784,"date":"2026-11-11T19:46:54","date_gmt":"2026-11-11T11:46:54","guid":{"rendered":"https:\/\/kerkepm.com\/machines\/pelletizing-systems\/water-ring-strand-pelletizing\/"},"modified":"2026-11-11T23:40:50","modified_gmt":"2026-11-11T15:40:50","slug":"water-ring-strand-pelletizing","status":"publish","type":"page","link":"https:\/\/kerkepm.com\/es\/machines\/pelletizing-systems\/water-ring-strand-pelletizing\/","title":{"rendered":"Water-Ring Strand Pelletizing (PET)"},"content":{"rendered":"<div class=\"k3\">\r\n<div class=\"wrap\"><div class=\"crumbs\"><a href=\"\/\">Home<\/a><span>\/<\/span><a href=\"\/machines\/\">Machines<\/a><span>\/<\/span><a href=\"\/machines\/pelletizing-systems\/\">Pelletizing systems<\/a><span>\/<\/span>Water-Ring Strand Pelletizing (PET)<\/div><\/div><div class=\"wrap\"><div class=\"hero\">\r\n<p class=\"kicker\">Pelletizing \u00b7 Water-Ring Strand Pelletizing (PET)<\/p>\r\n<h1>Water-Ring Strand Pelletizing (PET): How Kerke Builds It<\/h1>\r\n<p class=\"dek\">A flowing water ring or trough locks strand temperature for PET, PA and other high-temperature polymers \u2014 uniform cylinders with low dust and intrinsic viscosity preserved for bottle-grade PET.<\/p>\r\n<div class=\"byline\"><div><b>Updated<\/b> 11 November 2026<\/div><div><b>Scope<\/b> PET \u00b7 PA \u00b7 high-temperature polymers\r\n<\/div><div><b>Output<\/b> 300\u20132,000 kg\/h<\/div><div><b>Pellet<\/b> Cylinder, low dust<\/div><\/div>\r\n<\/div><\/div>\r\n<div class=\"wrap\"><div class=\"appmedia\">\r\n<div class=\"mslider\" id=\"appslider\">\r\n<div class=\"ms-frame\"><div class=\"ms-slide on\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/pel-water-ring-strand-s1.webp\" alt=\"Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 1, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 1, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/pel-water-ring-strand-s2.webp\" alt=\"Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 2, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 2, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/pel-water-ring-strand-s3.webp\" alt=\"Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 3, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 3, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/pel-water-ring-strand-s4.webp\" alt=\"Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 4, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 4, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/pel-water-ring-strand-s5.webp\" alt=\"Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 5, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 5, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/pel-water-ring-strand-s6.webp\" alt=\"Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 6, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Water-Ring Strand Pelletizing (PET) \u2014 workshop photo 6, Kerke workshop, Nanjing<\/span><\/div><\/div>\r\n<button type=\"button\" class=\"ms-nav prev\" aria-label=\"Previous slide\">&#8249;<\/button>\r\n<button type=\"button\" class=\"ms-nav next\" aria-label=\"Next slide\">&#8250;<\/button>\r\n<div class=\"ms-dots\"><button type=\"button\" data-i=\"0\" class=\"ms-dot on\" aria-label=\"Slide 1\"><\/button><button type=\"button\" data-i=\"1\" class=\"ms-dot\" aria-label=\"Slide 2\"><\/button><button type=\"button\" data-i=\"2\" class=\"ms-dot\" aria-label=\"Slide 3\"><\/button><button type=\"button\" data-i=\"3\" class=\"ms-dot\" aria-label=\"Slide 4\"><\/button><button type=\"button\" data-i=\"4\" class=\"ms-dot\" aria-label=\"Slide 5\"><\/button><button type=\"button\" data-i=\"5\" class=\"ms-dot\" aria-label=\"Slide 6\"><\/button><\/div>\r\n<\/div>\r\n<div class=\"appmedia-text\">\r\n<nav class=\"wp-block-rank-math-toc-block k3-toc\" aria-label=\"On this page\"><b>On this page:<\/b><a href=\"#answer\">Quick answer<\/a><a href=\"#how\">How it works<\/a><a href=\"#fit\">Where it wins<\/a><a href=\"#specs\">Reference data<\/a><a href=\"#faq\">FAQ<\/a><\/nav>\r\n<section class=\"qa\" id=\"answer\"><h2 id=\"rm-s1\">Quick answer<\/h2><p>Water-ring strand pelletizing cools PET and PA strands in a temperature-controlled water ring or trough before dry cutting. The point is IV control: bottle-grade PET loses intrinsic viscosity if strands cool too slowly or sit in hot water. Flowing, thermostatted water plus immediate drying keeps IV loss inside the specification.<\/p><\/section>\r\n<\/div>\r\n<\/div><\/div>\r\n<div class=\"wrap\"><div class=\"grid\"><main>\r\n<div class=\"stats\"><div class=\"stat\"><b>300\u20132,000 kg\/h<\/b><span>capacity range<\/span><\/div><div class=\"stat\"><b>\u0394IV \u2264 0.02<\/b><span>typical IV loss<\/span><\/div><div class=\"stat\"><b>30 \u00b1 3 \u00b0C<\/b><span>water control band<\/span><\/div><div class=\"stat\"><b>\u22640.1%<\/b><span>pellet moisture<\/span><\/div><\/div>\r\n<p class=\"note\">Workshop photos \u2014 shot on our own lines in Nanjing, not stock images.<\/p>\r\n\r\n<h2 class=\"sec\" id=\"how\">How the water-ring strand pelletizing (pet) line works<\/h2>\r\n<ol>\r\n<li>Strands leave a PET-optimised die with a strand count matched to the output.<\/li><li>A thermostatted water ring\/trough with strong flow quenches the strands within seconds.<\/li><li>Water temperature is held in a narrow band \u2014 usually 28\u201333 \u00b0C for bottle-grade PET.<\/li><li>Air knife and vacuum wiper strip surface water before the cutter.<\/li><li>Pellets are screened, and optionally crystallized and dried downstream to target moisture.<\/li>\r\n<\/ol>\r\n\r\n<h2 class=\"sec\" id=\"fit\">Where this method wins<\/h2>\r\n<p>This is the PET specialist: bottle flake and sheet-grade pelletizing where intrinsic viscosity must survive the pelletizing step, PA compounding at high output, and any high-temperature polymer where slow air cooling would leave strands semi-molten at the cutter. Where pellets must be perfectly round instead, that is underwater pelletizing \u2014 different machine.<\/p>\r\n\r\n<h2 class=\"sec\" id=\"specs\">Reference data<\/h2>\r\n<div class=\"tw\"><table><caption><b>Table 1.<\/b> Water-Ring Strand Pelletizing (PET) \u2014 reference selection data.<\/caption>\r\n<thead><tr><th scope=\"col\">Item<\/th><th scope=\"col\">Value<\/th><\/tr><\/thead><tbody><tr><td class=\"num\">Best for<\/td><td class=\"num\">PET bottle flake\/sheet, PA, high-temperature polymers<\/td><\/tr><tr><td class=\"num\">Output range<\/td><td class=\"num\">300\u20132,000 kg\/h<\/td><\/tr><tr><td class=\"num\">Pellet shape<\/td><td class=\"num\">Cylinder, low dust, IV-critical<\/td><\/tr><tr><td class=\"num\">Watch out<\/td><td class=\"num\">Water temperature control, IV loss on start-up<\/td><\/tr><\/tbody><\/table><\/div>\r\n<p class=\"note\">Reference output measured on the stated material family; subject to a material trial. Die hole count sets the capacity ceiling \u2014 check the die, not the label.<\/p>\r\n\r\n<h2 class=\"sec\" id=\"notes\">Selection notes from our floor<\/h2>\r\n<p>The two numbers that decide PET quality are water temperature and residence time. We commission the ring at 30 \u00b0C with flow tuned so strands are below 60 \u00b0C before the cutter. On start-up, dump the first strands \u2014 the IV loss is concentrated in the transition material.<\/p>\r\n\r\n<h2 class=\"sec\" id=\"faq\">FAQ<\/h2>\r\n<details open><summary>How much IV is lost in pelletizing?<\/summary><p>On a tuned line, 0.01\u20130.02 dL\/g from pelletizing alone. The bigger losses happen upstream in devolatilization if vacuum or residence time is wrong \u2014 that is where we look first.<\/p><\/details><details><summary>Can this line take bottle flake with labels?<\/summary><p>Flake should be pre-washed. Label fragments blind the die and break strands; the strand line tolerates far less contamination than a hot-face pelletizer.<\/p><\/details><details><summary>Water ring or underwater for PET?<\/summary><p>Strand for sheet and bottle grades where cylinder pellets are accepted and IV matters most; underwater when the customer needs round, dust-free pellets for spinning or foaming grades.<\/p><\/details>\r\n\r\n<div class=\"method\"><h2 id=\"rm-s7\">Where these numbers come from<\/h2>\r\n<p>Output ranges, pellet shapes and watch-outs come from Kerke commissioning records and the pelletizing systems parameter table. Where a catalogue value and a trial value disagree, the trial value is the one we quote.<\/p>\r\n<p>Reviewed by the Kerke process team, Nanjing. Page updated 11 November 2026.<\/p><\/div>\r\n\r\n<div class=\"related\"><h2 id=\"rm-s8\">Related<\/h2><div class=\"rel-grid\"><a class=\"rel\" href=\"\/machines\/pelletizing-systems\/\"><span>Machine<\/span>Pelletizing systems \u2014 7 methods<\/a><a class=\"rel\" href=\"\/applications\/pet-pelletizing\/\"><span>Application<\/span>PET Pelletizing<\/a><a class=\"rel\" href=\"\/machines\/two-stage-extruder\/\"><span>Machine<\/span>Two-stage KTE\/SE<\/a><a class=\"rel\" href=\"\/machines\/pelletizing-systems\/\"><span>Machine<\/span>Pelletizing systems \u2014 7 methods compared<\/a><\/div><\/div>\r\n<div class=\"cta\"><div><b>Not sure which pelletizing method fits your material?<\/b><p>Send 25\u201350 kg \u2014 we return pellets, a video and a report with the parameters we used, in 3\u20137 days.<\/p><\/div>\r\n<div class=\"acts\"><a href=\"\/get-a-quote\/\">Get a quote<\/a>\r\n<a class=\"alt\" href=\"\/get-a-quote\/#trial\">Send material for trial<\/a><\/div><\/div>\r\n<\/main>\r\n<aside><h5>On this page<\/h5><ol><li><a href=\"#answer\">Quick answer<\/a><\/li><li><a href=\"#how\">How it works<\/a><\/li><li><a href=\"#fit\">Where it wins<\/a><\/li><li><a href=\"#specs\">Reference data<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ol>\r\n<div class=\"sidecard\"><b>Model or trial first?<\/b><p>A model number tells you the envelope; a trial tells you the output. We quote the second one.<\/p>\r\n<a class=\"btn\" href=\"\/get-a-quote\/\">Request a quote<\/a>\r\n<a class=\"btn ghost\" href=\"\/machines\/pelletizing-systems\/\">All 7 pelletizing methods<\/a><\/div><\/aside><\/div><\/div>\r\n<script>\n(function(){\n  var root=document.getElementById('appslider'); if(!root) return;\n  var slides=[].slice.call(root.querySelectorAll('.ms-slide'));\n  var dots=[].slice.call(root.querySelectorAll('.ms-dot'));\n  var cur=0, timer=null, locked=false;\n  function show(i){\n    cur=(i+slides.length)%slides.length;\n    slides.forEach(function(s,j){\n      s.classList.toggle('on', j===cur);\n      var v=s.querySelector('.ms-video');\n      if(j!==cur && v){ var f=v.querySelector('iframe');\n        if(f){ f.remove(); var p=v.querySelector('.ms-play'); if(p) p.style.display=''; } }\n    });\n    dots.forEach(function(d,j){ d.classList.toggle('on', j===cur); });\n    var v=slides[cur].querySelector('.ms-video');\n    if(v){ locked=true; stop(); playVideo(v); }\n  }\n  \/* \u81ea\u52a8\u64ad\u653e\uff1a3s \u4e00\u5f20\uff1b\u60ac\u505c\u6682\u505c\uff0c\u79fb\u51fa\u6062\u590d\uff1b\u8f6e\u5230\u89c6\u9891\u81ea\u52a8\u9759\u97f3\u64ad\u653e\u5e76\u505c\u7559\uff08locked\uff09\uff0c\u624b\u52a8\u5207\u6362\u540e\u6062\u590d\u8f6e\u64ad *\/\n  function start(){ if(timer || document.hidden || locked) return; timer=setInterval(function(){ show(cur+1); }, 3000); }\n  function stop(){ if(timer){ clearInterval(timer); timer=null; } }\n  function playVideo(v){\n    if(v.querySelector('iframe')) return;\n    var f=document.createElement('iframe');\n    f.src='https:\/\/www.youtube.com\/embed\/'+v.dataset.yt+'?autoplay=1&mute=1&rel=0';\n    f.setAttribute('allow','autoplay; encrypted-media; picture-in-picture');\n    f.setAttribute('allowfullscreen','');\n    var p=v.querySelector('.ms-play'); if(p) p.style.display='none';\n    v.insertBefore(f, p);\n  }\n  function manual(i){ locked=false; show(i); start(); }\n  document.addEventListener('visibilitychange', function(){ if(document.hidden) stop(); else start(); });\n  root.addEventListener('mouseenter', stop);\n  root.addEventListener('mouseleave', function(){ if(!locked) start(); });\n  root.querySelector('.prev').addEventListener('click', function(){ manual(cur-1); });\n  root.querySelector('.next').addEventListener('click', function(){ manual(cur+1); });\n  dots.forEach(function(d){ d.addEventListener('click', function(){ manual(+d.dataset.i); }); });\n  root.addEventListener('click', function(e){\n    var p=e.target.closest('.ms-play'); if(!p) return;\n    locked=true; stop(); playVideo(p.parentNode);\n  });\n  show(0);\n  start();\n})();\n<\/script>\r\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"Product\", \"name\": \"Water-Ring Strand Pelletizing (PET) \u2014 Kerke\", \"brand\": {\"@type\": \"Brand\", \"name\": \"Kerke\"}, \"description\": \"A flowing water ring or trough locks strand temperature for PET, PA and other high-temperature polymers \u2014 uniform cylinders with low dust and intrinsic viscosity preserved for bott\", \"category\": \"Pelletizing systems\", \"additionalProperty\": [{\"@type\": \"PropertyValue\", \"name\": \"Output\", \"value\": \"300\u20132,000 kg\/h\"}, {\"@type\": \"PropertyValue\", \"name\": \"Pellet shape\", \"value\": \"Cylinder, low dust\"}]}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How much IV is lost in pelletizing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"On a tuned line, 0.01\u20130.02 dL\/g from pelletizing alone. 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Updated 11 November 2026Scope PET \u00b7 PA [&#8230;]\n","protected":false},"author":0,"featured_media":0,"parent":19,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"application":[],"app_group":[],"class_list":["post-2784","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/2784","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/comments?post=2784"}],"version-history":[{"count":0,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/2784\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/19"}],"wp:attachment":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/media?parent=2784"}],"wp:term":[{"taxonomy":"application","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/application?post=2784"},{"taxonomy":"app_group","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/app_group?post=2784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}