{"id":520,"date":"2026-07-29T19:23:02","date_gmt":"2026-07-29T17:23:02","guid":{"rendered":"https:\/\/www.dipaolaforniture.com\/collegamenti-idraulici-a-tenuta-guarnizioni-ptfe-e-serraggio\/"},"modified":"2026-08-02T19:46:49","modified_gmt":"2026-08-02T17:46:49","slug":"collegamenti-idraulici-a-tenuta-guarnizioni-ptfe-e-serraggio","status":"publish","type":"post","link":"https:\/\/www.dipaolaforniture.com\/en\/collegamenti-idraulici-a-tenuta-guarnizioni-ptfe-e-serraggio\/","title":{"rendered":"Collegamenti idraulici a tenuta: guarnizioni, PTFE e serraggio"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Una perdita su un raccordo sembra un problema minore, ma nel tempo significa pompe che ripartono, consumi inutili e macchie d\u2019acqua o d\u2019olio dove non servono. La tenuta dipende da poche regole, spesso trascurate.<\/p><h2 class=\"wp-block-heading\">Filettature coniche e cilindriche: non sono la stessa cosa<\/h2>\n<div class=\"wp-block-media-text has-media-on-the-right is-vertically-aligned-center is-image-fill\" style=\"grid-template-columns:auto 44%\"><figure class=\"wp-block-media-text__media\" style=\"background-image:url(https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3.jpg);background-position:50% 50%\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1470\" height=\"980\" src=\"https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3.jpg\" alt=\"Raccordi e tubazioni per collegamenti idraulici\" class=\"wp-image-39 size-full\" srcset=\"https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3.jpg 1470w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3-300x200.jpg 300w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3-1024x683.jpg 1024w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3-768x512.jpg 768w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-3-18x12.jpg 18w\" sizes=\"(max-width: 1470px) 100vw, 1470px\" \/><\/figure><div class=\"wp-block-media-text__content\"><p class=\"wp-block-paragraph\">Alcune filettature fanno tenuta sul filetto stesso, altre hanno bisogno di una guarnizione in appoggio. Accoppiare pezzi pensati per sistemi diversi \u00e8 la causa pi\u00f9 frequente delle perdite: prima di forzare, verifica che raccordo e sede siano compatibili. Sulle filettature coniche la tenuta nasce proprio nell\u2019accoppiamento e il sigillante serve a colmare le micro-imperfezioni; su quelle cilindriche il compito \u00e8 affidato a una guarnizione che appoggia in battuta, quindi aggiungere nastro sul filetto non risolve nulla e rischia solo di rovinare la sede. Se hai un dubbio porta il pezzo in negozio: riconoscerlo dal vivo \u00e8 questione di un attimo.<\/p><\/div><\/div>\n<h2 class=\"wp-block-heading\">Nastro PTFE, paste sigillanti e canapa<\/h2><p class=\"wp-block-paragraph\">Il nastro in PTFE va avvolto nel senso dell\u2019avvitamento, con qualche giro sovrapposto e senza esagerare: troppo materiale impedisce l\u2019accoppiamento corretto. Le paste sigillanti sono comode sui filetti metallici e si adattano bene alle piccole imperfezioni; la canapa, usata con la pasta, resta una soluzione affidabile sugli impianti idrici tradizionali. In ogni caso, scegli un prodotto compatibile con il fluido e con la temperatura di lavoro.<\/p><h2 class=\"wp-block-heading\">O-ring e guarnizioni piane<\/h2><p class=\"wp-block-paragraph\">Le guarnizioni non si riutilizzano quasi mai: una volta schiacciate perdono elasticit\u00e0. Controlla che le sedi siano pulite e prive di graffi, che l\u2019O-ring non sia tagliato durante il montaggio e, dove previsto, lubrifica leggermente per evitare torsioni.<\/p>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1470\" height=\"928\" src=\"https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-5.jpg\" alt=\"Tubazioni e componenti idraulici pronti in magazzino\" class=\"wp-image-43\" srcset=\"https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-5.jpg 1470w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-5-300x189.jpg 300w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-5-1024x646.jpg 1024w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-5-768x485.jpg 768w, https:\/\/www.dipaolaforniture.com\/wp-content\/uploads\/2026\/04\/featured-image-5-18x12.jpg 18w\" sizes=\"(max-width: 1470px) 100vw, 1470px\" \/><\/figure>\n<h2 class=\"wp-block-heading\">Serrare il giusto, non di pi\u00f9<\/h2><p class=\"wp-block-paragraph\">Stringere oltre il necessario deforma le sedi e rovina i filetti, soprattutto sui materiali pi\u00f9 tenerni come ottone e plastica. Meglio serrare gradualmente e verificare la tenuta in pressione, aggiungendo un piccolo scatto solo se serve.<\/p><p class=\"wp-block-paragraph\">Nel nostro reparto trovi tubi, raccordi e guarnizioni per ogni esigenza: <a href=\"\/en\/contatti\/\">scrivici<\/a> indicando fluido, diametro e pressione di lavoro e ti aiutiamo a scegliere.<\/p>","protected":false},"excerpt":{"rendered":"<p>Una perdita su un raccordo sembra un problema minore, ma nel tempo significa pompe che ripartono, consumi inutili e macchie [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":39,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[13,22],"tags":[],"class_list":["post-520","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-idraulica"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Collegamenti idraulici a tenuta: guarnizioni, PTFE e serraggio -<\/title>\n<meta name=\"description\" content=\"Come evitare le perdite nei collegamenti idraulici: filettature, nastro PTFE, paste sigillanti, O-ring e il serraggio corretto.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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