{"id":4144,"date":"2026-02-14T09:00:00","date_gmt":"2026-02-14T09:00:00","guid":{"rendered":"https:\/\/www.desopipe.com\/?p=4144"},"modified":"2026-03-06T08:02:51","modified_gmt":"2026-03-06T08:02:51","slug":"pn25-ppr-valves-for-solar-heating","status":"publish","type":"post","link":"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/","title":{"rendered":"Yuqori bosimli yechimlar: Quyosh isitish tizimlarida PN25 PPR klapanlarini qachon belgilash kerak"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Mundarija<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Tarkibni almashtirish\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">O\u02bbchirish<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/#Pressure_Temperature_in_Solar_Heating_Systems\" >Quyosh isitish tizimlarida bosim va harorat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/#What_is_the_Difference_Between_a_PN20_and_a_PN_25_Valve\" >PN20 va PN 25 klapanlari o&#039;rtasidagi farq nima?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/#Failure_Risks_of_Under-Specification\" >Texnik xususiyatlarning yetarli emasligi sababli ishlamay qolish xavfi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/#Selecting_Valves_for_Long-Term_Stability\" >Uzoq muddatli barqarorlik uchun klapanlarni tanlash<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/#DESO_High-Pressure_Valve_Solutions\" >DESO yuqori bosimli klapan yechimlari<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-valve\/pn25-ppr-valves-for-solar-heating\/#Conclusion\" >Xulosa<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Zamonaviy sanitariya-tesisat sanoatida PPR tizimlari issiq va sovuq suv quvurlari uchun standart material hisoblanadi. Ushbu standart xalqaro muvofiqlik, jumladan, sifat menejmenti va ISO9001 standartlari bilan qo&#039;llab-quvvatlanishi kerak. <a href=\"https:\/\/www.desopipe.com\/uz\/certificate\/\" target=\"_blank\" rel=\"noreferrer noopener\">DIN 8077\/8078 standartlari<\/a>. Bu har bir quvur va <strong>PPR klapani<\/strong> bosimga chidamlilik va uzoq muddatli termal barqarorlik bo&#039;yicha texnik xususiyatlarga javob beradi.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Biroq, barcha PPR (Polipropilen tasodifiy kopolimer) quvurlari yuqori haroratga bardosh bera olmaydi. Shuning uchun quvur yoki klapan harorat oralig&#039;iga bardosh bera oladimi yoki yo&#039;qligini aniqlash uchun &quot;PN&quot; reytingiga qarashingiz kerak.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>PN 25 klapani<\/strong> &quot;og&#039;ir&quot; klapan bo&#039;lib, 25 bar bosimga (taxminan 362 psi) mo&#039;ljallangan. Siz standart oshxona lavabosi uchun standart PN16 yoki PN20 reytingidan foydalanishingiz mumkin. Biroq, agar sanitariya-tesisat tizimi jiddiy stress ostida bo&#039;lsa, sizga PN25 reytingiga ega klapanlar kerak bo&#039;ladi. Ushbu maqolada siz quyosh issiqlik tizimlaringiz uchun to&#039;g&#039;ri klapanni qanday tanlashni o&#039;rganasiz.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pressure_Temperature_in_Solar_Heating_Systems\"><\/span>Quyosh isitish tizimlarida bosim va harorat<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Quyosh kollektorlari - bu quyosh issiqlik tizimlari bilan o&#039;rnatiladigan qurilmalar. Ular quyosh nurini ushlab, to&#039;playdi va uni foydalanishga yaroqli energiyaga aylantiradi. Ular ko&#039;pincha ko&#039;p qavatli uylarga o&#039;rnatiladi va 80\u00b0C (176\u00b0F) eng yuqori haroratga yetadi. Shunday qilib, <strong>PPR isitish klapani<\/strong> Quyosh aylanishida atrof-muhit harorati va qaynash nuqtalari o&#039;rtasida o&#039;zgarib turadigan suyuqlikni boshqarish kerak.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Elektr uzilishlari yoki juda issiq kunlarda nasos ishlamay qolishi paytida tizim turg&#039;unlikka uchrashi mumkin. Bu suyuqlik kengayishi bilan ichki bosimning tez oshishiga olib kelishi mumkin. Standart <strong>PPR klapani<\/strong> agar bo&#039;lsa, eskirishi mumkin <a href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/\" target=\"_blank\" rel=\"noreferrer noopener\">PN reytingi<\/a> eng yuqori issiqlik kengayish hodisalariga bardosh bera olmaydi. Bundan tashqari, ish harorati oshganda PPR ning bosim ko&#039;tarish qobiliyati pasayadi.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Shunday qilib, tanlash <strong>yuqori haroratli PPR klapani<\/strong> To&#039;g&#039;ri PN reytingi 70\u00b0C yoki 95\u00b0C da xavfsizlik chegarasini saqlab qolishga yordam beradi. Hozirgi vaqtda 25 barli klapan sizning quyosh isitish tizimingiz uchun standart tanlovdir.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_Difference_Between_a_PN20_and_a_PN_25_Valve\"><\/span>PN20 va PN 25 klapanlari o&#039;rtasidagi farq nima?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PN25 va PN 20 klapan reytinglari o&#039;rtasidagi asosiy farq shundaki <a href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-pipe\/ppr-pipe-wall-thickness-sdr-vs-pn\/\" target=\"_blank\" rel=\"noreferrer noopener\">devor qalinligi<\/a> va xom ashyoning o&#039;ziga xos navi. A PN20 <strong>PPR klapani<\/strong> 20\u00b0C da 2,0 MPa (20 bar) normal bosim uchun mo&#039;ljallangan. Boshqa tomondan, 25 barlik birlik 2,5 MPa (25 bar) uchun ishlab chiqilgan.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quyosh energiyasi uchun PN 25<strong> <\/strong>qalinroq strukturaviy devorlarni ta&#039;minlaydi. Bu devorlar doimiy issiqlik va stress ostida plastmassaning sekin deformatsiyasiga qarshilik ko&#039;rsatadi. Tizim eng yuqori issiqlik chegaralarida ishlaganda ham, <strong>yuqori haroratli PPR klapani<\/strong> eritish bo&#039;g&#039;inlarida oqishdan himoyalangan bo&#039;lib qoladi. Bu klapanning qo&#039;shimcha material zichligi bilan bog&#039;liq.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quyida farqlar va qo&#039;llanilishlarni ko&#039;rsatadigan jadval keltirilgan:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Ilova ssenariysi<\/strong><\/td><td><strong>Odatdagi stress omillari<\/strong><\/td><td><strong>PN20 PPR klapanining ishlashi<\/strong><\/td><td><strong>PN25 PPR klapanining (yuqori bosim) ishlashi<\/strong><\/td><\/tr><tr><td>Ko&#039;p qavatli turar-joy minoralari<\/td><td>Statik bosim + Suv bolg&#039;asi (Kuchlanishlar)<\/td><td>Strukturaviy chegaralarga yaqin ishlaydi; nasosni ishga tushirish zarbalaridan charchashga moyil.<\/td><td>Devorga stress tushmasdan bosimning keskin o&#039;sishini yutish uchun mexanik &quot;bosh joy&quot; beradi.<\/td><\/tr><tr><td>Tijorat quyosh energiyasining turg&#039;unligi<\/td><td>Haddan tashqari issiqlik (90\u00b0C+) + Suyuqlikning kengayishi<\/td><td>Sezilarli darajada &quot;de-reyting&quot; pasayadi; material yumshaydi va bug &#039;bosimi ostida ishdan chiqishi mumkin.<\/td><td>Devor zichligining ortishi tufayli eng yuqori haroratlarda yuqori bosim quvvatini saqlab qoladi.<\/td><\/tr><tr><td>Sanoat jarayonlarini isitish<\/td><td>Doimiy issiqlik yuki (75\u00b0C+) + 24\/7 ishlash<\/td><td>Suzilish yorilishi xavfi yuqori; molekulalar vaqt o&#039;tishi bilan &quot;cho&#039;zilib&quot;, oqishlarga olib keladi.<\/td><td>Qalinroq SDR (Standart o&#039;lcham nisbati) uzoq muddatli barqarorlik uchun molekulyar deformatsiyaga qarshi turadi.<\/td><\/tr><tr><td>Tuman isitish nasos stansiyalari<\/td><td>Yuqori chastotali mexanik tebranish<\/td><td>Yupqa devorlar o&#039;rindiqning deformatsiyasiga va ichki bypass oqishiga olib kelishi mumkin.<\/td><td>Mustahkamlangan korpus tebranishlarni susaytiruvchi vosita vazifasini bajaradi va ichki hizalanishni mukammal darajada saqlaydi.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Failure_Risks_of_Under-Specification\"><\/span>Texnik xususiyatlarning yetarli emasligi sababli ishlamay qolish xavfi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yuqori bosimli quyosh konturi uchun klapanlarni tanlashda, to&#039;g&#039;ri PN reytingiga ega tavsiya etilgan klapanni tanlang. Pastroq reytingli klapanlardan foydalanish bir qator sanoat xavflarini keltirib chiqaradi, masalan:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Suzilish yorilishi:<\/strong> Klapanlarda mikroskopik yoriqlar paydo bo&#039;ladi, bu esa materialning ishlash muddatini qisqartiradi. Bunga uzoq vaqt davomida yuqori harorat ta&#039;sirida bo&#039;lish sabab bo&#039;ladi.&nbsp;<\/li>\n\n\n\n<li><strong>Bo&#039;g&#039;imlarning zaifligi:<\/strong> Uzoq muddatli issiqlik ta&#039;sirida issiqlik kengayishi ham yuzaga keladi. Bu sikl takrorlanganda, quvur va quvur orasidagi termoyadroviy bog&#039;lanishga katta yuk tushadi. <strong>PPR isitish klapani.&nbsp;<\/strong><\/li>\n\n\n\n<li><strong>Tizimning ishlamay qolishi: <\/strong>Suyuqlik yo&#039;qotilishi va kollektor shikastlanishi ko&#039;pincha klapanlarning noto&#039;g&#039;ri ko&#039;rsatilganligi tufayli yuzaga keladi. Bu ko&#039;pincha keng tarqalgan nosozlik nuqtalari.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Muhandislar ushbu keng tarqalgan sanoat muammolariga qarshi xavfsizlik choralarini ko&#039;rishlari mumkin. 25 barli klapanni belgilash<strong> <\/strong>tizimning 25 yildan ortiq xizmat qilishini ta&#039;minlaydi.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Selecting_Valves_for_Long-Term_Stability\"><\/span>Uzoq muddatli barqarorlik uchun klapanlarni tanlash<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Muhandislar DIN 8077\/8078 yoki ISO 15874 kabi xalqaro standartlarga muvofiqligini tekshirishlari kerak. Bu tanlashda qat&#039;iy talabdir <strong>PPR isitish klapani.<\/strong> Ushbu standartlar o&#039;lchamlar va bosim sinovlari kabi zarur texnik xususiyatlarni belgilaydi.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>yuqori haroratli PPR klapani<\/strong> muayyan ishni bajarishi kerak <a href=\"https:\/\/www.desopipe.com\/uz\/blog\/ppr-pipe\/ppr-pipe-sizes-and-specifications-guide-for-buyer\/\" target=\"_blank\" rel=\"noreferrer noopener\">SDR (Standart o&#039;lcham nisbati)<\/a> quvur tizimining. Barqaror <strong>PPR klapani<\/strong> shuningdek, tishli ulanishlar uchun CW617N jez qotishma qo&#039;shimchalari bilan jihozlangan bo&#039;lishi kerak. Bu galvanik korroziyaning oldini oladi va metall kollektorlar bilan ishonchli mexanik moslashuvni ta&#039;minlaydi.&nbsp;<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  \n  <title>Qahramon mahsuloti<\/title>\n  <style>\n    .hero-card {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: Arial, sans-serif;\n      text-decoration: none;\n      color: inherit;\n font-family: 'Poppins';\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins',\n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #0066cc;\n      color: #fff;\n      text-decoration: none;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #004c99;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.desopipe.com\/uz\/product\/plastic-ball-valve-with-brass-core-ii\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2025\/03\/Plastic-ball-valve-with-brass-core-II.jpg\" alt=\"\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">Guruch yadroli plastik sharli valf II<\/div>\n    <div class=\"hero-description\">\nHajmi diapazoni: DN20\u2013DN32 (20mm\u201363mm).<br>\n\nBosim darajasi: PN25 (2,5 MPa gacha).\n\n <\/div>\n    <span class=\"hero-link\">Mahsulotni ko&#039;rish<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DESO_High-Pressure_Valve_Solutions\"><\/span>DESO yuqori bosimli klapan yechimlari<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PPR quvurlari ishlab chiqaruvchilardan biri bo&#039;lgan DESO mustahkamlangan quvurlar ishlab chiqarishga ixtisoslashgan <strong>PN 25 klapani<\/strong> birliklar. Bizning <strong>yuqori haroratli PPR klapani<\/strong> Ushbu liniya quyosh issiqlik tizimlari uchun maxsus ishlab chiqarilgan. Ular 100% Borealis yoki Hyosungdan foydalanadilar. <a href=\"https:\/\/www.desopipe.com\/uz\/blog\/manufacturer\/buyers-guide-to-high-quality-ppr-pipe-material\/\" target=\"_blank\" rel=\"noreferrer noopener\">xomashyo<\/a> kimyoviy barqarorlikni ta&#039;minlash uchun.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>PPR isitish klapani<\/strong> 95\u00b0C da 1000 soat davomida sinovdan o&#039;tkaziladi. Bu uning ISO 15874 11.2-bandiga (yoki shunga o&#039;xshash) muvofiq issiqlik degradatsiyasiga chidamliligini tasdiqlaydi. Pudratchilar turar-joy yoki tijorat mijozlariga 25 barli ishlash uchun mo&#039;ljallangan tizimni taqdim etishga intilishadi. Ushbu komponentlarga javob berish orqali qayta chaqiruvlar va qayta ishlash bartaraf etiladi.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Xulosa<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tanlash <strong>PN 25 klapani<\/strong> quyosh isitish tizimining xavfsizligi va samaradorligini ta&#039;minlash uchun proaktiv chora hisoblanadi. Muhandislar sanitariya-tesisat tizimi talablariga asoslanib, to&#039;g&#039;ri klapanlarni belgilashlari kerak. Standart bo&#039;lsa-da <strong>PPR klapani <\/strong>standart sanitariya-tesisat uchun yetarli bo&#039;lishi mumkin, quyosh isitish tizimining issiqlik talablari yanada bardoshli klapanni talab qiladi. To&#039;g&#039;ri o&#039;rnatish orqali <strong>PPR isitish klapani, <\/strong>Siz tizim xavfsizligi, samaradorligi va 25 yillik sertifikatlangan xizmat muddatiga amin bo&#039;lishingiz mumkin.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.desopipe.com\/uz\/contact\/\" style=\"background-color:#0588a7\" target=\"_blank\" rel=\"noreferrer noopener\">Bepul taklif oling<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>In the modern plumbing industry, PPR systems are the standard material for hot and cold water plumbing. This standard must be backed by international compliance, including<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":4245,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[],"class_list":["post-4144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ppr-valve"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PPR Valve PN25 for High-Pressure Solar Heating | DESO Group<\/title>\n<meta name=\"description\" content=\"Learn why a high temperature PPR valve is required for solar heating and why a PN 25 valve is required to ensure thermal stability, creep rupture resistance, and a 25-year system service life.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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