{"product_id":"systemtrenner-mit-kontrollierbaren-druckreduzierten-zonen-typ-ba","title":"System separator BA Compact 1\/2\" with controllable differential pressure","description":"\u003ch2\u003e\u003cspan\u003eBackflow preventer with controllable pressure-reduced zones, type BA\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv class=\"art-detail row-wr\"\u003e\n\u003cdiv class=\"art-detail__wrapper\"\u003e\n\u003cdiv class=\"art-detail__specification\"\u003e\n\u003cdiv id=\"specificationText0\" class=\"art-detail__specification-value collapse\"\u003eBackflow preventer with controllable pressure-reduced zones, type BA, compact version. Certified to EN 12729. Type BA. Connection: G 1\/2\u0026quot; A (ISO 228-1) male thread, union. Operating differential pressure: 14 kPa. Mean temperature range: 0–65 °C. PN (nominal pressure): PN 10. Material: dezincification-resistant brass DR \u0026quot;low-lead\u0026quot;.\u003c\/div\u003e\n\u003cdiv class=\"art-detail__specification-value collapse\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"art-detail__specification-value collapse\"\u003e\n\u003cdiv class=\"product__description\"\u003e\n\u003cdiv class=\"product__tech-data p-tech\"\u003e\n\u003ch3 id=\"technical-data\" class=\"section-title\"\u003eTechnical data\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p-tech__el\"\u003e\n\u003cspan class=\"p-tech__label\"\u003eOperating differential pressure\u003c\/span\u003e:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003e\u003cspan class=\"p-tech__value\"\u003e14 kPa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"p-tech__el\"\u003e\n\u003cspan class=\"p-tech__label\"\u003eMean temperature range\u003c\/span\u003e:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003e\u003cspan class=\"p-tech__value\"\u003e0–65 °C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"p-tech__el\"\u003e\n\u003cspan class=\"p-tech__label\"\u003ePN (nominal pressure)\u003c\/span\u003e:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003e\u003cspan class=\"p-tech__value\"\u003ePN 10\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"p-tech__el\"\u003e\n\u003cspan class=\"p-tech__label\"\u003eMaterial\u003c\/span\u003e:\u003cspan\u003e\u0026nbsp;\u003c\/span\u003e\u003cspan class=\"p-tech__value\"\u003edezincification-resistant brass DR \u0026quot;low-lead\u0026quot;\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product__lowlead\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cimg src=\"https:\/\/www.caleffi.com\/themes\/custom\/caleffi_base\/images\/logos\/low-lead.svg\" width=\"64\" height=\"38\" alt=\"Low Lead\" title=\"Low Lead\" style=\"font-size: 0.875rem;\"\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product__note\" style=\"text-align: left;\"\u003e\n\u003ch3 id=\"note\" class=\"section-title\" style=\"text-align: left;\"\u003eNotes on the backflow preventer\u003c\/h3\u003e\n\u003cp\u003eA strainer of the 577 series must be installed upstream.\u003c\/p\u003e\n\u003ch3\u003eOperating principle\u003c\/h3\u003e\n\u003cp\u003eThe backflow preventer with non-controllable differential pressure type CA consists of: an inlet check valve (1), an outlet check valve (2), and a drain device (3). The two check valves separate three different zones with three different pressures: the inlet chamber (A), the intermediate chamber (B), also called the differential pressure zone, and the outlet chamber (C). In the middle area is the drain device (3). The drain device (3) is directly connected to the diaphragm (4). This movable assembly is controlled during opening and closing by the pressure difference between the inlet and outlet pressure of the check valve and the contrast spring (5).\u003c\/p\u003e\n\u003ch4 style=\"text-align: left;\"\u003eCorrect flow conditions\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eUnder normal flow conditions, both check valves are\u003cimg src=\"https:\/\/gemashop.de\/cdn\/shop\/files\/koreekter_durchfluss_160x160.png\" alt=\"CST12 correct flow rate\" style=\"margin: 5px 5px 5px 2px; float: left;\" data-original=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/koreekter_durchfluss_160x160.png?v=1722413877\" data-files=\"koreekter_durchfluss.png\" loading=\"lazy\"\u003e\u003cbr\u003eopen, with the pressure in the intermediate chamber (B) always being below the inlet pressure (A) due to a pre-calculated pressure loss at the first check valve (1).\u003cbr\u003eThe pressure difference therefore acts on the inner diaphragm (4) and generates a force that keeps the drain valve (3), which communicates with the atmosphere, closed by\u003cbr\u003epressure on the contrast spring (5).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: right;\" class=\"product__certifications\"\u003e\n\u003cp class=\"section-title\"\u003e\u0026nbsp;\u003c\/p\u003e\n\u003ch4 class=\"section-title\"\u003eInlet-side negative pressure\u003c\/h4\u003e\n\u003cp class=\"section-title\"\u003e\u003cbr\u003eWhen the inlet-side pressure drops, both check valves close. The\u003cimg style=\"margin: 5px 2px 5px 5px; float: right;\" src=\"https:\/\/gemashop.de\/cdn\/shop\/files\/Unterdruck_ES_160x160.png\" alt=\"Negative pressure\" data-original=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/Unterdruck_ES_160x160.png?v=1722414361\" data-files=\"Unterdruck_ES.png\" loading=\"lazy\"\u003e drain valve (3) opens as soon as the pressure difference Δp between the inlet chamber (A) and the middle chamber (B) reaches a value just below the pre-calculated value at the contrast spring (5). The drain continues until the middle chamber of the backflow preventer is empty. In this way, an air gap (safety zone) is created and prevents contaminated water from flowing back from the circuit (C) into the water supply network, even in the event that the check valve (2) fails. As soon as the normal state is restored (inlet pressure higher than outlet pressure), the drain valve closes and the\u003cbr\u003ebackflow preventer is ready for operation again.\u003c\/p\u003e\n\u003ch4 style=\"text-align: left;\" class=\"section-title\"\u003eOutlet-side overpressure\u003c\/h4\u003e\n\u003cp class=\"section-title\" style=\"text-align: left;\"\u003eIf the pressure in the outlet chamber (C) rises so much that it is higher than the inlet pressure (A), the check valve (2) closes and thus prevents the water already supplied to the consumer from flowing back towards the public water supply. If the check valve (2) leaks or another fault occurs on the backflow preventer, the backflow preventer always ensures the interruption (separation) of the connection between the consumer and the public water supply. Like all devices with positive action, the backflow preventer is technically and structurally designed to guarantee the highest safety standard in every situation.\u003c\/p\u003e\n\u003ch3 class=\"section-title\" style=\"text-align: left;\"\u003eTechnical data\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eBackflow preventer type BA. AG connections\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003e1\/2\u0026quot;. Housing, cover and drain seat\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003emade of dezincification-resistant brass alloy.\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eRods of the retention system and springs\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003emade of stainless steel.\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eSeals made of NBR.\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eMax. operating temperature: 65 degrees C.\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eMax. operating pressure: 10 bar.\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eActive safety device.\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eComplete with upstream, intermediate, and downstream measuring connections\u003c\/li\u003e\n\u003cli class=\"section-title\" style=\"text-align: left;\"\u003eDrain funnel with pipe mounting.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 id=\"certifications\" class=\"section-title\" style=\"text-align: left;\"\u003eDownload\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/CST12_Einbauanleitung.pdf?v=1722412612\" title=\"Installation instructions CT12\" rel=\"noopener\" target=\"_blank\" aria-label=\"Besuchen Sie eine Webseite über Einbauanleitung CT12\"\u003eInstallation instructions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/Bedienungsanleitung_CT12.pdf?v=1722412746\" title=\"Operating instructions CT12\" rel=\"noopener\" target=\"_blank\" aria-label=\"Besuchen Sie eine Webseite über Bedienungsanleitung CT12\"\u003eOperating instructions\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Caleffi","offers":[{"title":"Default Title","offer_id":49131569873244,"sku":"CST12","price":123.89,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/systemtrenner-ba-kompakt-12-mit-kontrollierbarem-differenzdruck-1050514.png?v=1770692605","url":"https:\/\/ee.gemashop.de\/en\/products\/susteemieraldaja-kontrollitavate-rohualandustsoonidega-tuup-ba","provider":"GEMA Shop","version":"1.0","type":"link"}