{"id":2523,"date":"2021-07-13T12:20:36","date_gmt":"2021-07-13T16:20:36","guid":{"rendered":"https:\/\/www.ovivowater.com\/?post_type=product&#038;p=2523"},"modified":"2025-10-23T09:00:56","modified_gmt":"2025-10-23T13:00:56","slug":"ja-screw-classifier","status":"publish","type":"product","link":"https:\/\/www.ovivowater.com\/en\/product\/ja-screw-classifier\/","title":{"rendered":"J+A Screw Classifier"},"content":{"rendered":"<div data-block_b49cbb061597ac077b5b3a1021e67175 class=\"ovivo-content-block block-image-text \">\n  <div class=\"container\">\n    <div class=\"row justify-content-between align-items-center\">\n      <div class=\"col-12 image-div col-md-6 order-md-2\">\n                              <div class=\"block-image-text__slider--wrapper\">\n              <div class=\"block-image-text__slider--slides\">\n                                                  \n                  <div class=\"block-image-text__slider--slide\">\n                                                                                        \n                                              <img decoding=\"async\" src=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-01_735x551.webp\" alt=\"The Screw Classifier accomplishes the important function of dewatering the grit\" class=\"img-fluid block-image-text__slide\">\n                                                            <\/div>\n                                                    \n                  <div class=\"block-image-text__slider--slide\">\n                                                                                        \n                                              <img data-lazy=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-02_735x551.webp\" alt=\"The pumped grit enters the hydro-cyclone to receive the flow \" class=\"img-fluid block-image-text__slide\">\n                                                            <\/div>\n                                                    \n                  <div class=\"block-image-text__slider--slide\">\n                                                                                        \n                                              <img data-lazy=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-03_735x551.webp\" alt=\"Grit product dewatered as it is raised by screw to high discharge point and into dumpster.\" class=\"img-fluid block-image-text__slide\">\n                                                            <\/div>\n                                                    \n                  <div class=\"block-image-text__slider--slide\">\n                                                                                        \n                                              <img data-lazy=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-05_735x551.webp\" alt=\"The Jones + Attwood\u2122 Screw Classifier ready for installation\" class=\"img-fluid block-image-text__slide\">\n                                                            <\/div>\n                                                <\/div>\n                              <div class=\"block-image-text__slider--nav\">\n                  <div class=\"block-image-text__slider--nav-slides\">\n                                                            <div class=\"block-image-text__slider--slide\">\n                                                                                                                                            <img decoding=\"async\" src=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-01_735x551.webp\" alt=\"The Screw Classifier accomplishes the important function of dewatering the grit\" class=\"img-fluid\">\n                                                <\/div>\n                                                                <div class=\"block-image-text__slider--slide\">\n                                                                                                                                            <img decoding=\"async\" src=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-02_735x551.webp\" alt=\"The pumped grit enters the hydro-cyclone to receive the flow \" class=\"img-fluid\">\n                                                <\/div>\n                                                                <div class=\"block-image-text__slider--slide\">\n                                                                                                                                            <img decoding=\"async\" src=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-03_735x551.webp\" alt=\"Grit product dewatered as it is raised by screw to high discharge point and into dumpster.\" class=\"img-fluid\">\n                                                <\/div>\n                                                                <div class=\"block-image-text__slider--slide\">\n                                                                                                                                            <img decoding=\"async\" src=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-05_735x551.webp\" alt=\"The Jones + Attwood\u2122 Screw Classifier ready for installation\" class=\"img-fluid\">\n                                                <\/div>\n                                                            <\/div>\n                                  <\/div>\n                          <\/div>\n                        <\/div>\n      <div class=\"col-12 text-div col-md-6 col-xl-5 pl-lg-5 pl-xl-3\">\n                      <div class=\"wysiwyg\">\n                \n                                  <h6 class=\"block-image-text__microcopy\">Reliable and robust grit separation<\/h6>\n<h1 class=\"block-image-text__heading\">Jones + Attwood<sup>\u2122<\/sup> Screw Classifier<\/h1>\n\n                                                  <h6 class=\"block-image-text__subheading\">The Jones + Attwood Screw Classifier systems are free-standing units used for the separation of mineral grit from other types of solids.<\/h6>\n                                                  <p>The classifier is designed to separate pre-screened solids of varying specific gravities. At the same time, the classifier accomplishes the important function of dewatering the grit and elevating it for discharge into a dumpster. In every classifier operation, there will be a feed, a rotating screw, an underflow and an overflow.<\/p>\n                                                  <a href=\"https:\/\/www.ovivowater.com\/en\/contact\/\" target=\"\"\n                     class=\"secondary-button imgblock-common_button\">\n                    <span>Contact an Expert<\/span>\n                    <i class=\"icon-ovivo-arrow\"><\/i>\n                  <\/a>\n                                              <\/div>\n          <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n\n<div data-block_38d1891ec38c91e12bc1ceb828e4f2d0 class=\"ovivo-content-block anchor-nav-content__wrapper owproduct-tblcontent-wraper\">\n    <div class=\"anchor-nav-content__nav--sticky\">\n        <div class=\"container\">\n            <div class=\"row\">\n                <div class=\"col-12 p-0 pr-lg-3 pl-lg-3\">\n                    <ul class=\"nav nav-tabs anchor-nav-content__nav--listing fc-anchor-nav-content-nav\">\n                                                                                    <li class=\"nav-item anchor-nav-content__nav--single\" role=\"presentation\">\n                                    <a class=\"nav-link active \" href=\"#pills-0\">Features &amp; Benefits<\/a>\n                                <\/li>\n                                                            <li class=\"nav-item anchor-nav-content__nav--single\" role=\"presentation\">\n                                    <a class=\"nav-link \" href=\"#pills-1\">How it works<\/a>\n                                <\/li>\n                                                        <li class=\"nav-item anchor-nav-content__nav--single related\" role=\"presentation\">\n                                <a class=\"nav-link\" href=\"#pills-related\">Related Products<\/a>\n                            <\/li>\n                                            <\/ul>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n    <div class=\"anchor-nav-content__tabs\">\n                                                                            <div class=\"anchor-nav-content__tab  otablecontent-1\" id=\"pills-0\" name=\"pills-0\" >\n                    <div class=\"container\">\n                        <div class=\"row\">\n                            <div class=\"col-12\">\n                                <div id=\"accordion-pills-0\" role=\"tablist\" aria-multiselectable=\"true\">\n                                    <div class=\"card\">\n                                        <div class=\"card-header\" role=\"tab\" id=\"section1HeaderId\">\n                                            <h2 class=\"mb-0\">\n                                                <a class=\"anchor-nav-content__tab--title\" data-toggle=\"collapse\" data-parent=\"#accordion-pills-0\" href=\"#accordion-content-0\" aria-expanded=\"true\" aria-controls=\"#accordion-content-0\">\n                                                    Features &amp; Benefits\n                                                <\/a>\n                                            <\/h2>\n                                        <\/div>\n                                                                                                                                <div id=\"accordion-content-0\" class=\"in collapse show\" role=\"tabpanel\" aria-labelledby=\"section1HeaderId\">\n                                                <div class=\"card-body\">\n                                                    <div class=\"anchor-nav-content__tab--content\">\n                                                                                                                                                                                                                                                            <div class=\"row justify-content-center is_last\">\n                                                                        <div class=\"col-12 col-lg-10 col-xl-9 col-xxl-8\">\n                                                                            <div data-block_38d1891ec38c91e12bc1ceb828e4f2d0 class=\"ovivo-content-block block-generic-content__wrapper\">\n    <div class=\"container\">\n        <div class=\"row justify-content-center\">\n            <div class=\"col-12  \">\n                <div class=\"owrow\">\n                                            <div class=\"block-generic-content__single wysiwyg \">\n                                                                                        <p><span style=\"font-weight: 400\">The Screw Classifier incorporates the original Jones + Attwood features that have a proven a record of reliability and robustness. This system has been <\/span><span style=\"font-weight: 400\">successfully installed in hundreds of installations worldwide and can fit into multiple applications to suit partner needs where small sediment particles must be separated to protect downstream equipment. <\/span><span style=\"font-weight: 400\">The Screw Classifier <\/span><span style=\"font-weight: 400\">has the following features and benefits:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400\">Jones + Attwood Grit Classifier works in conjunction with a range of industry standard hydro-cyclone to reduce the volume of pumped water to the classifier<\/span><\/li>\n<li><span style=\"font-weight: 400\"> \u00a0<\/span><span style=\"font-weight: 400\">The hydro-cyclone is designed to remove at least 95 percent of the grit entering the feed inlet that is larger than 150 mesh with a specific gravity of 2.65 s.g. or greater. Higher capture efficiencies are available on request<\/span><\/li>\n<li><span style=\"font-weight: 400\">High-quality stainless-steel construction<\/span><\/li>\n<li><span style=\"font-weight: 400\">Robust screw operating in a grit bed or UHMW liners<\/span><\/li>\n<li>High capacity mechanical\/electrical drive system with ample overload capacity<\/li>\n<\/ul>\n\n                                                    <\/div>\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n                                                                        <\/div>\n                                                                    <\/div>\n                                                                                                                                                                        <\/div>\n                                                <\/div>\n                                            <\/div><!--accordion-content-0-->\n                                                                                                                        <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                                                            <div class=\"anchor-nav-content__tab  otablecontent-2\" id=\"pills-1\" name=\"pills-1\" >\n                    <div class=\"container\">\n                        <div class=\"row\">\n                            <div class=\"col-12\">\n                                <div id=\"accordion-pills-1\" role=\"tablist\" aria-multiselectable=\"true\">\n                                    <div class=\"card\">\n                                        <div class=\"card-header\" role=\"tab\" id=\"section1HeaderId\">\n                                            <h2 class=\"mb-0\">\n                                                <a class=\"anchor-nav-content__tab--title\" data-toggle=\"collapse\" data-parent=\"#accordion-pills-1\" href=\"#accordion-content-1\" aria-expanded=\"true\" aria-controls=\"#accordion-content-1\">\n                                                    How it works\n                                                <\/a>\n                                            <\/h2>\n                                        <\/div>\n                                                                                                                                <div id=\"accordion-content-1\" class=\"in collapse show\" role=\"tabpanel\" aria-labelledby=\"section1HeaderId\">\n                                                <div class=\"card-body\">\n                                                    <div class=\"anchor-nav-content__tab--content\">\n                                                                                                                                                                                        <div class=\"row justify-content-center \">\n                                                                        <div class=\"col-12\">\n                                                                            \n                                                                                                                                                        <div data-block_38d1891ec38c91e12bc1ceb828e4f2d0 class=\"ovivo-content-block block-image-text owtable-content-imagetext\">\n  <div class=\"container\">\n    <div class=\"row justify-content-between align-items-center\">\n      <div class=\"col-12 image-div col-md-6 order-md-2\">\n                              <div class=\"block-image-text__single mb-0\">\n                                            <img decoding=\"async\" src=\"https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/JA-ScrewClassifier-04_735x551.webp\" alt=\"Rendering of The Jones + Attwood\u2122 Screw Classifier \" class=\"block-image-text__slide\">\n                          <\/div>\n                        <\/div>\n      <div class=\"col-12 text-div col-md-6 col-xl-5 pl-lg-5 pl-xl-3\">\n                  <div class=\"wysiwyg\">\n            \n                                  <p><span style=\"font-weight: 400\">The pumped grit \/ water mixture enters the<\/span><span style=\"font-weight: 400\"> hydro-cyclone to receive the flow and reduce the liquid delivered to the classifier, retaining the mineral particles that drop into the <\/span><span style=\"font-weight: 400\">settlement bowl of the screw classifier unit where the water level is maintained by a weir. Any floating solids will flow over the weir within the trough wall to scalp off those solids that are lighter than grit. <\/span><span style=\"font-weight: 400\">\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">As the grit settles within the main trough, an inclined Archimedean screw elevates and transports the grit above the water level. The grit product is dewatered as it is raised by the screw to a high discharge point and into a dumpster. All flow that passes over the weir is directed back to the main sewage flow.<\/span><\/p>\n\n                                                                                              <\/div>\n          <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n                                                                        <\/div>\n                                                                    <\/div>\n                                                                                                                                                                                                                                                                                                                                                                                                                                            <\/div>\n                                                <\/div>\n                                            <\/div><!--accordion-content-1-->\n                                                                                                                        <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                                                        <div class=\"anchor-nav-content__tab otablecontent-3\" id=\"pills-related\" name=\"pills-related\">\n                    <div class=\"container\">\n                        <div class=\"row\">\n                            <div class=\"col-12\">\n                                <div id=\"accordion-pills-related\" role=\"tablist\" aria-multiselectable=\"true\">\n                                    <div class=\"card\">\n                                        <div class=\"card-header\" role=\"tab\" id=\"section1HeaderId\">\n                                            <h2 class=\"mb-0\">\n                                                <span class=\"anchor-nav-content__tab--title\" data-parent=\"#accordion-pills-related\" href=\"#accordion-content-related\" aria-expanded=\"true\" aria-controls=\"#accordion-content-related\">\n                                                Related Products\n                                                <\/span>\n                                            <\/h2>\n                                        <\/div>\n                                        <div id=\"accordion-content-related\" class=\"in collapse show\" role=\"tabpanel\" aria-labelledby=\"section1HeaderId\">\n                                            <div class=\"card-body\">\n                                                <div class=\"anchor-nav-content__tab--content\">\n                                                    <div class=\"anchor-nav-content__tab--related-products\">\n                                                                                                                <div data-block_38d1891ec38c91e12bc1ceb828e4f2d0 class=\"ovivo-content-block block-tiles-images__wrapper my-3 my-lg-5\">\n            <div class=\"row mobile-scroll justify-content-lg-center\">\n                                                                                    <div class=\" col-10 col-md-8 col-lg-3 owrelateprod-sec-1\">\n                            <a href=\"https:\/\/www.ovivowater.com\/en\/product\/ja-grit-trap\/\" target=\"\" class=\"generic-tiles__single\">\n                                <div class=\"generic-tiles__single--image\" style=\"background-image:url(https:\/\/www.ovivowater.com\/app\/uploads\/2026\/09\/PDP_J-AGritTrap-01_735x551.webp)\"><\/div>\n                                <div class=\"generic-tiles__single--content\">\n                                    <div class=\"generic-tiles__single--title\">\n                                        J+A Jeta<sup>\u00ae<\/sup> Grit Trap\n                                    <\/div>\n                                    <div class=\"generic-tiles__single--description\">\n                                        Grit removal is a prerequisite of wastewater treatment. It prevents buildup in process chambers, and erosion of equipment in the primary treatment works. The Jeta Grit Trap is a high&hellip;\n                                    <\/div>\n                                    <div class=\"generic-tiles__single--link\">\n                                        <span>Read more<\/span>\n                                        <i class=\"icon-ovivo-arrow\"><\/i>\n                                    <\/div>\n                                <\/div>\n                            <\/a>\n                        <\/div>\n                                        \n                    \n                                                   \n                    <\/div>\n    <\/div>\n                                                    <\/div>\n                                                <\/div>\n                                            <\/div>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n<\/div>\n\n\n<div data-block_60525e617e57e class=\"ovivo-content-block block-tiles__wrapper pt-5\">\n    <div class=\"container\">\n        <div class=\"row justify-content-center \">\n                                            \n                                                                                    <div class=\"col-12 col-lg-4 mb-4\">\n                                                    <a href=\"https:\/\/www.ovivowater.com\/en\/services\/\" target=\"\" class=\"generic-tiles__single alt-style {}\">\n                                <div class=\"generic-tiles__single--content\">\n                                                                            <div class=\"generic-tiles__single--title\">\n                                            Parts &amp; 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