{"id":16715,"date":"2024-09-26T14:04:46","date_gmt":"2024-09-26T07:04:46","guid":{"rendered":"https:\/\/marico.com.vn\/?p=16715"},"modified":"2024-10-17T16:01:11","modified_gmt":"2024-10-17T09:01:11","slug":"hydrostatic-release-unit-hru","status":"publish","type":"post","link":"https:\/\/marico.com.vn\/en\/hydrostatic-release-unit-hru\/","title":{"rendered":"Hydrostatic Release Unit (HRU): The automatic safety solution for life rafts"},"content":{"rendered":"<p>The hydrostatic release unit plays a crucial role in the timely deployment of life rafts from ships\u2014an essential component of life-saving appliances (LSA) required on all vessels. Today, all life-saving equipment must be released with minimal human intervention, ensuring swift and reliable activation during emergencies.<\/p>\n<p>This means that, when necessary, life-saving devices must be immediately ready for use without delay.<\/p>\n<p>Automation has become a key solution to meet this demand. In scenarios where human intervention is difficult or time-consuming, it\u2019s essential to have mechanisms in place to ensure that the life-saving equipment can be activated promptly.<\/p>\n<p>The release mechanism is the most critical part of life-saving appliances, enabling safe and timely deployment when needed. For life rafts, this mechanism relies on a specialized device called the Hydrostatic Release Unit (HRU).<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_58 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >N\u1ed9i dung b&agrave;i vi\u1ebft<\/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=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6a0affc55d540\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/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><\/label><input aria-label=\"Toggle\" aria-label=\"item-6a0affc55d540\"  type=\"checkbox\" id=\"item-6a0affc55d540\"><\/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:\/\/marico.com.vn\/en\/hydrostatic-release-unit-hru\/#What_is_a_Hydrostatic_Release_Unit_HRU\" title=\"What is a Hydrostatic Release Unit (HRU)?\">What is a Hydrostatic Release Unit (HRU)?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/marico.com.vn\/en\/hydrostatic-release-unit-hru\/#How_does_a_Hydrostatic_Release_Unit_HRU_work\" title=\"How does a Hydrostatic Release Unit (HRU) work?\">How does a Hydrostatic Release Unit (HRU) work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/marico.com.vn\/en\/hydrostatic-release-unit-hru\/#Operational_sequence_of_the_Hydrostatic_Release_Unit_HRU\" title=\"Operational sequence of the Hydrostatic Release Unit (HRU)\">Operational sequence of the Hydrostatic Release Unit (HRU)<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_a_Hydrostatic_Release_Unit_HRU\"><\/span><strong>What is a Hydrostatic Release Unit (HRU)?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Hydrostatic Release Unit (HRU) is a critical safety device in the maritime industry, designed to automatically activate the release of life rafts from ships in emergency situations. As an essential component of life-saving appliances (LSA), the HRU ensures that life rafts can be deployed without direct human intervention when incidents such as ship sinking or accidents occur.<\/p>\n<p>HRUs are typically installed on commercial vessels, yachts, and maritime transport ships and are regulated under international maritime safety standards in compliance with the International Maritime Organization (IMO). The HRU guarantees that life rafts are safely and swiftly deployed into the water during emergencies, even if crew members are unable to manually release them due to hazardous conditions.<\/p>\n<p>The primary function of an HRU is to operate independently and automatically in emergencies without requiring manual activation. This enhances safety and reduces risks, ensuring life-saving equipment is always ready for deployment in critical moments.<\/p>\n<p>With its significant role in ensuring the safety of lives at sea, the HRU is a vital part of modern life-saving appliances, contributing to the effectiveness of global maritime safety efforts.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-16615\" src=\"https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/HRU-structure_bo-nha-thuy-tinh.jpg\" alt=\"\" width=\"1238\" height=\"829\" srcset=\"https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/HRU-structure_bo-nha-thuy-tinh.jpg 1238w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/HRU-structure_bo-nha-thuy-tinh-600x402.jpg 600w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/HRU-structure_bo-nha-thuy-tinh-300x201.jpg 300w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/HRU-structure_bo-nha-thuy-tinh-1024x686.jpg 1024w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/HRU-structure_bo-nha-thuy-tinh-768x514.jpg 768w\" sizes=\"(max-width: 1238px) 100vw, 1238px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_does_a_Hydrostatic_Release_Unit_HRU_work\"><\/span>How does a Hydrostatic Release Unit (HRU) work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/marico.com.vn\/en\/products\/lalizas-hydrostatic-release-unit-for-liferafts-solas-med-uscg\/\">The Hydrostatic Release Unit (HRU)<\/a> operates on the principle of hydrostatic pressure, enabling the automatic release of life rafts when a ship encounters an emergency and begins to sink. As the ship sinks to a certain depth, the increasing water pressure activates the HRU\u2019s switch. At that point, the HRU disconnects the rope or pin securing the life raft, releasing it from its storage position and allowing it to float to the surface, ready for rescue operations.<\/p>\n<p>This mechanism is similar to how oxygen masks in airplanes automatically drop when the cabin pressure suddenly decreases. However, instead of relying on air pressure, the HRU is triggered by water pressure to release the life raft.<\/p>\n<p>HRUs are typically installed in critical areas of the ship and are well-protected within sealed casings. When the vessel starts to sink, the rapid change in water level\u2014referred to as draft\u2014creates higher hydrostatic pressure, which triggers the HRU. The HRU is usually set to activate at a depth of 1.5 to 4 or 5 meters below the ship\u2019s maximum design draft.<\/p>\n<p>A key feature of the HRU is its reliability under extreme conditions, including fires or other unexpected incidents. It ensures that life-saving equipment is deployed on time, providing critical protection for those onboard.<\/p>\n<p>By operating independently and automatically, the HRU plays a crucial role in maritime safety, ensuring that life rafts are available without delay in emergencies.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-16617\" src=\"https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/Bo-nha-thuy-tinh_HRU.jpg\" alt=\"\" width=\"1238\" height=\"829\" srcset=\"https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/Bo-nha-thuy-tinh_HRU.jpg 1238w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/Bo-nha-thuy-tinh_HRU-600x402.jpg 600w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/Bo-nha-thuy-tinh_HRU-300x201.jpg 300w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/Bo-nha-thuy-tinh_HRU-1024x686.jpg 1024w, https:\/\/marico.com.vn\/wp-content\/uploads\/2024\/09\/Bo-nha-thuy-tinh_HRU-768x514.jpg 768w\" sizes=\"(max-width: 1238px) 100vw, 1238px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Operational_sequence_of_the_Hydrostatic_Release_Unit_HRU\"><\/span>Operational sequence of the Hydrostatic Release Unit (HRU)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The operation of an HRU follows a straightforward yet critical sequence during emergencies. When a ship starts sinking or becomes submerged to a certain depth, the rising hydrostatic pressure is detected by the HRU through its sensor system and membrane that come into contact with water. Upon sensing the change in pressure, the HRU automatically activates.<\/p>\n<p>The activation signal triggers the release mechanism for the life raft, cutting or detaching the securing ropes, pins, or safety straps. If it is an inflatable life raft, it will automatically inflate using compressed gas stored in its chambers and then be released into the water.<\/p>\n<p>This automated mechanism saves valuable time and minimizes the need for human intervention in deploying life-saving equipment. In emergencies, the crew may face disorientation, injuries, or multiple challenges, making the automation of the HRU crucial to ensure lives are protected.<\/p>\n<p>HRUs must adhere to strict safety standards and undergo regular inspections before each voyage as part of the ship\u2019s safety checklist. To ensure optimal performance and reliability, HRUs need to be replaced every 4 to 5 years, depending on the vessel type and operational conditions.<\/p>\n<p><a href=\"https:\/\/www.cmhammar.com\/update-marking-of-expiry-date-on-h20\/\" target=\"_blank\" rel=\"noopener\">&gt;&gt;&gt;Expiry Date must be marked on the H20 prior to installation onboard<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The hydrostatic release unit plays a crucial role in the timely deployment of life rafts from ships&mdash;an essential component of life-saving appliances (LSA) required on all vessels. Today, all life-saving equipment must be released with minimal human intervention, ensuring swift [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":16623,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[234],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/posts\/16715"}],"collection":[{"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/comments?post=16715"}],"version-history":[{"count":1,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/posts\/16715\/revisions"}],"predecessor-version":[{"id":16716,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/posts\/16715\/revisions\/16716"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/media\/16623"}],"wp:attachment":[{"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/media?parent=16715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/categories?post=16715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/marico.com.vn\/en\/wp-json\/wp\/v2\/tags?post=16715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}