{"id":2536,"date":"2022-08-19T17:25:56","date_gmt":"2022-08-19T14:25:56","guid":{"rendered":"https:\/\/polymat-bg.com\/products\/%d0%bf%d1%80%d1%83%d0%b6%d0%b8%d0%bd%d0%bd%d0%be-%d0%bf%d1%80%d0%b5%d0%b4%d0%bf%d0%b0%d0%b7%d0%bd%d0%b8-%d0%ba%d0%bb%d0%b0%d0%bf%d0%b0%d0%bd%d0%b8-%d0%bf%d0%bf%d0%ba-leser\/"},"modified":"2024-10-17T11:40:29","modified_gmt":"2024-10-17T08:40:29","slug":"%d0%bf%d1%80%d1%83%d0%b6%d0%b8%d0%bd%d0%bd%d0%be-%d0%bf%d1%80%d0%b5%d0%b4%d0%bf%d0%b0%d0%b7%d0%bd%d0%b8-%d0%ba%d0%bb%d0%b0%d0%bf%d0%b0%d0%bd%d0%b8-%d0%bf%d0%bf%d0%ba-leser","status":"publish","type":"page","link":"https:\/\/polymat-bg.com\/en\/products\/%d0%bf%d1%80%d1%83%d0%b6%d0%b8%d0%bd%d0%bd%d0%be-%d0%bf%d1%80%d0%b5%d0%b4%d0%bf%d0%b0%d0%b7%d0%bd%d0%b8-%d0%ba%d0%bb%d0%b0%d0%bf%d0%b0%d0%bd%d0%b8-%d0%bf%d0%bf%d0%ba-leser\/","title":{"rendered":"Safety valve LESER"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row css=&#8221;.vc_custom_1574276489776{margin-top: -69px !important;background-image: url(https:\/\/polymat-bg.com\/wp-content\/uploads\/2019\/11\/bg-page-title.small_.png?id=366) !important;background-position: 0 0 !important;background-repeat: no-repeat !important;}&#8221;][vc_column width=&#8221;1\/4&#8243; css=&#8221;.vc_custom_1574276608765{margin-top: -15px !important;}&#8221;][vc_column_text]<\/p>\n<h3><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-320 alignnone\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2019\/11\/title4-icon.png\" alt=\"\" width=\"33\" height=\"34\" \/>Products<\/h3>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&#8221;3\/4&#8243; css=&#8221;.vc_custom_1574277363104{margin-top: -5px !important;}&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/3&#8243;][vc_raw_html]JTVCd3BiX21lbnVfYWNjb3JkaW9uJTIwbWVudSUzRCUyMlNpZGViYXIlMjIlMjBpY29uJTNEJTIyJTJCJTIyJTVEJTBB[\/vc_raw_html][\/vc_column][vc_column width=&#8221;2\/3&#8243;][vc_column_text]<\/p>\n<h3>SAFETY VALVE LESER<\/h3>\n<p>[\/vc_column_text][vc_single_image image=&#8221;2067&#8243; img_size=&#8221;large&#8221;][vc_images_carousel images=&#8221;2070,2072,2074,2076,2078&#8243; img_size=&#8221;large&#8221; speed=&#8221;2000&#8243; autoplay=&#8221;yes&#8221; wrap=&#8221;yes&#8221; css_animation=&#8221;zoomInRight&#8221;][vc_column_text]<strong>What is a <\/strong><strong>safety <\/strong><strong>spring relief valve?<\/strong><br \/>\nThe main purpose of the safety valve is to protect human life, property, technical equipment and the environment. The spring loaded relief valve is designed to open and relieve excess pressure from vessels or equipment and close again preventing further discharge of liquid after normal set operating conditions are restored. A relief valve is a safety device and in many cases is the last line of defence. It is important to ensure that the relief valve can operate at all times and under all circumstances. The relief valve is not a process valve or pressure regulator and should not be abused as such. It should work with only one purpose: overpressure protection.<\/p>\n<h5><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2082\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008.png\" alt=\"\" width=\"188\" height=\"187\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008.png 268w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008-150x150.png 150w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008-147x146.png 147w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008-50x50.png 50w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008-76x75.png 76w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008-85x85.png 85w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-165008-80x80.png 80w\" sizes=\"(max-width: 188px) 100vw, 188px\" \/><\/h5>\n<p><strong>Main types of safety valves:<\/strong><\/p>\n<ul>\n<li>Conventional SAFETY VALVE<\/li>\n<li>SAFETY VALVE with pilot control<\/li>\n<li>\u201cChange-over\u201d type<\/li>\n<\/ul>\n<h5><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2084\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435.png\" alt=\"\" width=\"855\" height=\"280\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435.png 855w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435-300x98.png 300w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435-768x252.png 768w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435-260x85.png 260w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435-50x16.png 50w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0442\u0438\u043f\u043e\u0432\u0435-150x49.png 150w\" sizes=\"(max-width: 855px) 100vw, 855px\" \/><\/h5>\n<p><strong>Types SAFETY VALVE LESER<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2086\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424.png\" alt=\"\" width=\"1264\" height=\"828\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424.png 1264w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424-300x197.png 300w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424-1024x671.png 1024w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424-768x503.png 768w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424-223x146.png 223w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424-50x33.png 50w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-170424-114x75.png 114w\" sizes=\"(max-width: 1264px) 100vw, 1264px\" \/><\/p>\n<p><strong>SAFETY VALVE LESER Type 441, 442<\/strong><\/p>\n<p>From DN 250 up to DN 400<br \/>\nLESER offers the Type 441 in a new version with a cast carbon steel and stainless-steel case.<\/p>\n<p><strong>ADVANTAGES:<\/strong><\/p>\n<ul>\n<li>Delivery time reduced to just eight weeks after order for standard configurations.<\/li>\n<li>Valve selection made easy. Overlaps in the High Performance series have been eliminated.<\/li>\n<li>The price advantage is offered to customers with a reduced list price, plus many options already available at no additional charge.<\/li>\n<li>Production management is simplified by eliminating welding-related tests. The new model has a cast body.<\/li>\n<li>The new cast body design has replaced some structural values of the old welded design which can be found in the table below:<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2093\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646.png\" alt=\"\" width=\"958\" height=\"188\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646.png 958w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646-300x59.png 300w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646-768x151.png 768w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646-260x51.png 260w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646-50x10.png 50w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/\u0415\u043a\u0440\u0430\u043d\u043d\u0430-\u0441\u043d\u0438\u043c\u043a\u0430-2022-08-19-171646-150x29.png 150w\" sizes=\"(max-width: 958px) 100vw, 958px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2095\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/441.png\" alt=\"\" width=\"517\" height=\"905\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/441.png 517w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/441-171x300.png 171w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/441-83x146.png 83w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/441-29x50.png 29w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/441-43x75.png 43w\" sizes=\"(max-width: 517px) 100vw, 517px\" \/><\/p>\n<p><strong>Basic information on the principle of operation and selection of spring relief valves<\/strong><\/p>\n<p>Table of Contents (click on the links below)<\/p>\n<ol>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#definition\">What is a safety spring relief valve?<\/a><\/u><\/li>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#types\">Main types of safety valves?<\/a><\/u><\/li>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#function\">Working principle of SAFETY VALVE?<\/a><\/u><\/li>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#sizing\">Sizing and selection of SAFETY VALVE?<\/a><\/u><\/li>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#symbols\">Symbols associated with SAFETY VALVE?<\/a><\/u><\/li>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#download\">Basic knowledge of SAFETY VALVE \u2013 download file<\/a><\/u><\/li>\n<li><u><a href=\"https:\/\/www.leser.com\/en-us\/products\/#faq\">FAQ<\/a><\/u><\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2080\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/LESER_Safety_valve_spring_loaded_EN.png\" alt=\"\" width=\"285\" height=\"334\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/LESER_Safety_valve_spring_loaded_EN.png 220w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/LESER_Safety_valve_spring_loaded_EN-124x146.png 124w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/LESER_Safety_valve_spring_loaded_EN-43x50.png 43w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/LESER_Safety_valve_spring_loaded_EN-64x75.png 64w\" sizes=\"(max-width: 285px) 100vw, 285px\" \/><\/p>\n<p class=\"lsr-heading lsr-heading--primary lsr-ribbon__heading lsr-paragraph__heading\"><strong><span class=\"lsr-heading__label\">Suitable application in the following industrial sectors:<\/span><\/strong><\/p>\n<ul class=\"lsr-linklist .lsr-linklist--icon\">\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Chemical\" href=\"https:\/\/www.leser.com\/en\/industries\/chemical\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Chemical industry<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Petrochemical\" href=\"https:\/\/www.leser.com\/en\/industries\/petrochemical\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Petroleum and petrochemical industry<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Energy\" href=\"https:\/\/www.leser.com\/en\/industries\/energy\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Energy sector<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Technical Gases\" href=\"https:\/\/www.leser.com\/en\/industries\/technical-gases\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Technical gases<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"LNG and LPG\" href=\"https:\/\/www.leser.com\/en\/industries\/lng-and-lpg\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Production and storage of LNG and LPG<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Pharmaceutical\" href=\"https:\/\/www.leser.com\/en\/industries\/pharmaceutical\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Pharmaceutical industry<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Food and Beverage\" href=\"https:\/\/www.leser.com\/en\/industries\/food-and-beverage\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Food industry<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"Ship Building\" href=\"https:\/\/www.leser.com\/en\/industries\/ship-building\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Shipbuilding industry<\/span><\/a><\/li>\n<li class=\"lsr-linklist__item\"><a class=\"lsr-link lsr-link--arrow lsr-linklist__link\" title=\"General industries\" href=\"https:\/\/www.leser.com\/en\/industries\/general-industries\/\" data-btattached=\"true\"><span class=\"lsr-link__label lsr-linklist__link-text\">Water and sanitation sector<\/span><\/a><\/li>\n<\/ul>\n<p>Please send an inquiry to our email <a href=\"mailto:office@polymat-bg.com\">office@polymat-bg.com<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2091\" src=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small.jpg\" alt=\"\" width=\"1111\" height=\"739\" srcset=\"https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small.jpg 1111w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small-300x200.jpg 300w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small-1024x681.jpg 1024w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small-768x511.jpg 768w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small-219x146.jpg 219w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small-50x33.jpg 50w, https:\/\/polymat-bg.com\/wp-content\/uploads\/2022\/08\/Herobanner_Small-113x75.jpg 113w\" sizes=\"(max-width: 1111px) 100vw, 1111px\" \/>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;2088&#8243; img_size=&#8221;full&#8221;][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row css=&#8221;.vc_custom_1574276489776{margin-top: -69px !important;background-image: url(https:\/\/polymat-bg.com\/wp-content\/uploads\/2019\/11\/bg-page-title.small_.png?id=366) !important;background-position: 0 0 !important;background-repeat: no-repeat !important;}&#8221;][vc_column width=&#8221;1\/4&#8243; css=&#8221;.vc_custom_1574276608765{margin-top: -15px !important;}&#8221;][vc_column_text] Products [\/vc_column_text][\/vc_column][vc_column width=&#8221;3\/4&#8243; css=&#8221;.vc_custom_1574277363104{margin-top: -5px !important;}&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/3&#8243;][vc_raw_html]JTVCd3BiX21lbnVfYWNjb3JkaW9uJTIwbWVudSUzRCUyMlNpZGViYXIlMjIlMjBpY29uJTNEJTIyJTJCJTIyJTVEJTBB[\/vc_raw_html][\/vc_column][vc_column width=&#8221;2\/3&#8243;][vc_column_text] SAFETY VALVE LESER<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2340,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/pages\/2536"}],"collection":[{"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/comments?post=2536"}],"version-history":[{"count":3,"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/pages\/2536\/revisions"}],"predecessor-version":[{"id":2539,"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/pages\/2536\/revisions\/2539"}],"up":[{"embeddable":true,"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/pages\/2340"}],"wp:attachment":[{"href":"https:\/\/polymat-bg.com\/en\/wp-json\/wp\/v2\/media?parent=2536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}