{"id":8293,"date":"2026-05-28T18:14:48","date_gmt":"2026-05-28T18:14:48","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?p=8293"},"modified":"2026-05-28T18:15:16","modified_gmt":"2026-05-28T18:15:16","slug":"overpressure-protection-relief-valve","status":"publish","type":"post","link":"https:\/\/www.yunrui-controls.com\/ms\/overpressure-protection-relief-valve\/","title":{"rendered":"Perlindungan Tekanan Lebih: Prinsip Kerja Injap Pelega dan Panduan Siri Fisher"},"content":{"rendered":"<div style=\"max-width: 900px; margin: 0 auto; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.7; color: #2c3e50;\">\n<p><!-- Hero Section --><\/p>\n<div style=\"background: linear-gradient(135deg, #c0392b 0%, #e74c3c 100%); padding: 40px; border-radius: 12px; margin-bottom: 30px; text-align: center;\">\n<h1 style=\"color: white; margin: 0 0 15px 0; font-size: 2.2em; font-weight: bold;\">Perlindungan Tekanan Terlalu Tinggi: Prinsip Kerja Injap Pelega<\/h1>\n<p style=\"color: rgba(255,255,255,0.95); font-size: 1.2em; margin: 0; font-weight: 300;\">Sistem Keselamatan Penting untuk Kawalan Tekanan Saluran Paip Gas<\/p>\n<\/div>\n<p><!-- Warning Box --><\/p>\n<div style=\"background: #fff3cd; border-left: 5px solid #ffc107; padding: 25px; margin: 30px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin: 0 0 10px 0; color: #856404;\">\u26a0\ufe0f Nota Keselamatan Kritikal<\/h3>\n<p style=\"margin: 0; color: #856404;\"><strong>Perlindungan tekanan lampau<\/strong> merupakan pertimbangan asas dalam semua reka bentuk sistem saluran paip. Tujuannya adalah untuk mengekalkan tekanan hiliran pengawal selia pada nilai maksimum yang selamat. Tanpa perlindungan yang betul, kegagalan sistem boleh mengakibatkan akibat yang buruk.<\/p>\n<\/div>\n<p><!-- Introduction --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Memahami Perlindungan Tekanan Lebih<\/h2>\n<p>Sistem penghantaran dan pengagihan tekanan tinggi menghantar gas asli melalui pengawal selia ke sistem tekanan rendah yang digunakan oleh pengguna individu. Pengawal selia, perpaipan dan peralatan pengendalian gas dilindungi daripada keadaan tekanan lampau oleh <strong style=\"color: #c0392b;\">injap pelega<\/strong>.<\/p>\n<p>Titik tetap injap pelega dilaraskan kepada tahap tekanan yang ditentukan oleh <strong>nilai tekanan minimum maksimum yang dinilai<\/strong> komponen sistem tekanan rendah.<\/p>\n<p><!-- How It Works --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Bagaimana Tekanan Berlebihan Berlaku<\/h2>\n<p>Tekanan lampau berlaku apabila tekanan sistem melebihi titik tetap peralatan yang mengawalnya. Ini menunjukkan ralat dalam sistem (biasanya pada pengawal selia hulu). Jika tekanan ini tidak dihadkan, ia boleh menyebabkan kegagalan sistem sepenuhnya.<\/p>\n<div style=\"background: #e8f4f8; padding: 25px; border-radius: 8px; margin: 25px 0;\">\n<h4 style=\"margin: 0 0 15px 0; color: #c0392b;\">Untuk melaksanakan perlindungan tekanan lampau:<\/h4>\n<ol style=\"margin: 0; padding-left: 20px;\">\n<li style=\"margin-bottom: 10px;\">Kenal pasti bahagian sistem yang paling lemah<\/li>\n<li style=\"margin-bottom: 10px;\">Hadkan tekanan berlebihan di bawah tekanan maksimum yang dinilai bagi komponen tersebut<\/li>\n<\/ol>\n<\/div>\n<p><!-- Maximum Pressure Considerations --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Pertimbangan Tekanan Maksimum<\/h2>\n<p>Periksa komponen berikut untuk menentukan bahagian paling lemah sistem yang mengandungi tekanan:<\/p>\n<div style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin: 25px 0;\">\n<div style=\"background: white; border-radius: 10px; padding: 25px; box-shadow: 0 4px 6px rgba(0,0,0,0.07); border-top: 4px solid #e74c3c;\">\n<h3 style=\"margin: 0 0 15px 0; color: #e74c3c; font-size: 1.2em;\">\ud83d\udd27 Peralatan Hiliran<\/h3>\n<p style=\"margin: 0; color: #555;\">Komponen hiliran dengan tekanan undian maksimum terkecil (peralatan, pembakar, dandang, dll.) menentukan nilai tekanan tertinggi untuk semua peralatan hiliran.<\/p>\n<\/div>\n<div style=\"background: white; border-radius: 10px; padding: 25px; box-shadow: 0 4px 6px rgba(0,0,0,0.07); border-top: 4px solid #3498db;\">\n<h3 style=\"margin: 0 0 15px 0; color: #3498db; font-size: 1.2em;\">\u2699\ufe0f Pengawal Selia Utama<\/h3>\n<p style=\"margin: 0; color: #555;\">Pengawal selia mempunyai penarafan tekanan yang berbeza: tekanan masuk, tekanan keluar dan tekanan dalaman. Minimum antara ini menentukan tekanan maksimum yang dibenarkan.<\/p>\n<\/div>\n<div style=\"background: white; border-radius: 10px; padding: 25px; box-shadow: 0 4px 6px rgba(0,0,0,0.07); border-top: 4px solid #27ae60;\">\n<h3 style=\"margin: 0 0 15px 0; color: #27ae60; font-size: 1.2em;\">\ud83d\udd04 Pemasangan paip<\/h3>\n<p style=\"margin: 0; color: #555;\">Perpaipan dihadkan oleh kapasiti penahan tekanannya. Selain batasan fizikal, aplikasi praktikal mesti mematuhi satu atau lebih kod atau peraturan tekanan terkadar yang berkenaan.<\/p>\n<\/div>\n<\/div>\n<div style=\"background: #e8f8f5; padding: 20px; border-radius: 8px; margin: 25px 0; border-left: 4px solid #27ae60;\">\n<p style=\"margin: 0;\"><strong>Prinsip Utama:<\/strong> Yang <strong>nilai terendah<\/strong> antara tiga tekanan undian maksimum ini menjadi <strong>tekanan maksimum yang dibenarkan<\/strong> untuk keseluruhan sistem.<\/p>\n<\/div>\n<p><!-- Relief Valve Function --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Fungsi Injap Pelega<\/h2>\n<p>Pelepasan dicapai melalui peranti yang mengalirkan bendalir ke sistem tekanan rendah lain (biasanya atmosfera) untuk mengekalkan tekanan hilir pengawal selia pada nilai maksimum yang selamat.<\/p>\n<div style=\"background: #fff3cd; border-left: 5px solid #ffc107; padding: 20px; margin: 25px 0; border-radius: 0 8px 8px 0;\">\n<h4 style=\"margin: 0 0 10px 0; color: #856404;\">\u26a0\ufe0f Keperluan Keselamatan Penting<\/h4>\n<p style=\"margin: 0; color: #856404;\">Pelepasan injap pelega mesti diarahkan ke <strong>lokasi yang selamat<\/strong>. Pengudaraan yang betul adalah penting untuk operasi yang selamat.<\/p>\n<\/div>\n<p>Injap pelega dianggap sebagai <strong style=\"color: #c0392b;\">kaedah perlindungan tekanan lampau yang paling boleh dipercayai<\/strong> tersedia dan terdapat dalam pelbagai bentuk.<\/p>\n<p><!-- Fisher Relief Valves --><\/p>\n<div style=\"background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding: 30px; border-radius: 12px; color: white; margin: 30px 0;\">\n<h3 style=\"margin: 0 0 15px 0; font-size: 1.3em;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/regulators-relief-valves\/\"><span style=\"color: #ffffff;\">Siri Injap Pelega Fisher<\/span><\/a><\/h3>\n<p style=\"margin: 0 0 15px 0; opacity: 0.95;\"><strong>Nota:<\/strong> Injap pelega Fisher adalah <strong>TIDAK<\/strong> Injap keselamatan ASME. Ia direka khusus untuk aplikasi pengawalaturan tekanan gas.<\/p>\n<p style=\"margin: 0;\">YUNRUI menyediakan penyelesaian injap pelega Fisher yang lengkap untuk sistem gas asli.<\/p>\n<\/div>\n<p><!-- Common Fisher Series --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Biasa <a href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/regulators-relief-valves\/\">Siri Injap Pelega Fisher<\/a><\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 25px 0; font-size: 14px; background-color: white; box-shadow: 0 2px 8px rgba(0,0,0,0.1);\">\n<thead>\n<tr style=\"background: linear-gradient(135deg, #c0392b 0%, #e74c3c 100%);\">\n<th style=\"padding: 15px; text-align: left; color: white; font-weight: 600;\">Siri<\/th>\n<th style=\"padding: 15px; text-align: left; color: white; font-weight: 600;\">Jenis<\/th>\n<th style=\"padding: 15px; text-align: left; color: white; font-weight: 600;\">Aplikasi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background-color: #f8f9fa;\">\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-h200-series\/\">Siri Fisher H200<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Sistem gas tekanan rendah<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\">Siri Fisher H800<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Aplikasi tekanan sederhana<\/td>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-289-series\/\">Siri Fisher 289<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Sistem komersial\/perindustrian<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-627-series\/\">Siri Fisher 627<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega\/Tekanan Belakang<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Pengawal selia yang dikendalikan secara langsung<\/td>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-type-630\/\">Siri Fisher 630<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Pelepasan berkapasiti tinggi<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-mr98-series\/\">Siri Fisher MR98<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Aplikasi reka bentuk padat<\/td>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-ezr-series\/\">Siri Fisher EZR<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Penghantaran tekanan tinggi<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0; font-weight: 600;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/products\/fisher-type-63eg-98hm\/\">Siri Fisher 63EG<\/a><\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Injap Pelega<\/td>\n<td style=\"padding: 15px; border-bottom: 1px solid #e0e0e0;\">Sistem kendalian juruterbang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><!-- Selection Guide --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Garis Panduan Pemilihan<\/h2>\n<div style=\"display: flex; gap: 20px; margin: 25px 0; flex-wrap: wrap;\">\n<div style=\"flex: 1; min-width: 200px; background: #f8f9fa; padding: 25px; border-radius: 8px; border-left: 4px solid #e74c3c;\">\n<h3 style=\"margin: 0 0 15px 0; color: #e74c3c; font-size: 1.1em;\">Penilaian Tekanan<\/h3>\n<p style=\"margin: 0; color: #555;\">Pilih injap berdasarkan tekanan maksimum yang dibenarkan sistem dan kapasiti pelepasan yang diperlukan.<\/p>\n<\/div>\n<div style=\"flex: 1; min-width: 200px; background: #f8f9fa; padding: 25px; border-radius: 8px; border-left: 4px solid #3498db;\">\n<h3 style=\"margin: 0 0 15px 0; color: #3498db; font-size: 1.1em;\">Kapasiti Aliran<\/h3>\n<p style=\"margin: 0; color: #555;\">Pastikan kapasiti aliran yang mencukupi untuk senario tekanan lampau terburuk.<\/p>\n<\/div>\n<div style=\"flex: 1; min-width: 200px; background: #f8f9fa; padding: 25px; border-radius: 8px; border-left: 4px solid #27ae60;\">\n<h3 style=\"margin: 0 0 15px 0; color: #27ae60; font-size: 1.1em;\">Lokasi Ventilasi<\/h3>\n<p style=\"margin: 0; color: #555;\">Rancang laluan pelepasan yang selamat jauh dari sumber pencucuhan dan kawasan yang diduduki.<\/p>\n<\/div>\n<\/div>\n<p><!-- Conclusion --><\/p>\n<h2 style=\"color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; margin-top: 40px;\">Kesimpulan<\/h2>\n<p>Perlindungan tekanan lampau yang betul adalah penting untuk operasi sistem gas yang selamat. Injap pelega memberikan perlindungan yang paling andal dengan melepaskan tekanan berlebihan ke lokasi yang selamat sebelum komponen sistem rosak.<\/p>\n<p>Apabila memilih injap pelega, sentiasa pertimbangkan <strong>komponen paling lemah<\/strong> dalam sistem anda dan pastikan titik set injap pelega berada di bawah tekanan maksimum yang dinilai. <a style=\"color: #3498db; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/\">Injap pelepasan Fisher<\/a> menawarkan prestasi terbukti merentasi pelbagai penarafan dan aplikasi tekanan.<\/p>\n<div style=\"background: linear-gradient(135deg, #c0392b 0%, #e74c3c 100%); padding: 30px; border-radius: 12px; color: white; margin: 30px 0;\">\n<h3 style=\"margin: 0 0 15px 0;\">Kesimpulan Utama<\/h3>\n<ul style=\"margin: 0; padding-left: 20px;\">\n<li style=\"margin-bottom: 8px;\">Perlindungan tekanan lampau adalah asas kepada keselamatan saluran paip<\/li>\n<li style=\"margin-bottom: 8px;\">Kenal pasti komponen sistem yang paling lemah terlebih dahulu<\/li>\n<li style=\"margin-bottom: 8px;\">Tetapkan injap pelega di bawah tekanan minimum yang dinilai<\/li>\n<li style=\"margin-bottom: 8px;\">Pastikan pengudaraan yang selamat ke atmosfera<\/li>\n<li style=\"margin-bottom: 8px;\">Injap pelega Fisher BUKAN injap keselamatan ASME<\/li>\n<\/ul>\n<\/div>\n<p><!-- Contact CTA --><\/p>\n<p><!-- Related Reading --><\/p>\n<h3 style=\"color: #2c3e50; margin-top: 40px;\">Bacaan yang Disyorkan<\/h3>\n<ul style=\"padding-left: 20px;\">\n<li style=\"margin-bottom: 10px;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/technical-manual-fisher-627-series-regulator\/\">Panduan Teknikal Pengatur Pengurangan Tekanan Fisher 627<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a href=\"https:\/\/www.yunrui-controls.com\/ms\/fisher-ezr-regulator-operational-principles\/\">Pengatur Tekanan Fisher EZR: Ciri dan Aplikasi<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"color: #3498db; text-decoration: none;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/fisher-mr98-series-technical-specification\/\">Gambaran Keseluruhan Pengatur Tekanan Balik Siri Fisher MR98<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Overpressure Protection: Relief Valve Working Principles Essential Safety Systems for Gas Pipeline Pressure Control \u26a0\ufe0f Critical Safety Note Overpressure protection is a fundamental consideration in all pipeline system designs. Its purpose is to maintain the downstream pressure of the regulator at a safe maximum value. Without proper protection, system failure can result in catastrophic consequences. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8002,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[384,1],"tags":[491,492,493,494,489,490,315,317],"class_list":["post-8293","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-blogs","tag-fisher-h200","tag-fisher-ezr","tag-gas-safety","tag-pressure-regulation","tag-relief-valve","tag-overpressure-protection","tag-fisher-627","tag-fisher-mr98"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Overpressure Protection: Relief Valve Working Principles | YUNRUI<\/title>\n<meta name=\"description\" content=\"Learn about overpressure protection systems and Fisher relief valve series (H200, H800, 289, 627, 630, MR98, EZR, 63EG) for safe gas pipeline operation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.yunrui-controls.com\/ms\/overpressure-protection-relief-valve\/\" \/>\n<meta property=\"og:locale\" content=\"ms_MY\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Overpressure Protection: Relief Valve Working Principles and Fisher Series Guide\" \/>\n<meta property=\"og:description\" content=\"Learn about overpressure protection systems and Fisher relief valve series (H200, H800, 289, 627, 630, MR98, EZR, 63EG) for safe gas pipeline operation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.yunrui-controls.com\/ms\/overpressure-protection-relief-valve\/\" \/>\n<meta property=\"og:site_name\" content=\"Fisher, E+H &amp; 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