{"id":19912,"date":"2026-10-21T11:06:13","date_gmt":"2026-10-21T03:06:13","guid":{"rendered":"https:\/\/dmcgas.com\/?post_type=product&#038;p=19912"},"modified":"2026-10-21T11:25:18","modified_gmt":"2026-10-21T03:25:18","slug":"rego-lpg-safety-valve-8685g","status":"publish","type":"product","link":"https:\/\/dmcgas.com\/en\/product\/rego-lpg-safety-valve-8685g\/","title":{"rendered":"REGO 8685G Semi-Internal Pop-Action Pressure Relief Valve for LPG Tank"},"content":{"rendered":"<h3>Product Overview<\/h3>\n<p>The <strong>RegO 8685G<\/strong> is a premium semi-internal pop-action safety relief valve designed specifically as the primary overpressure protection device for <strong>ASME portable LPG storage tanks<\/strong>. Manufactured by RegO (USA), this 250 PSI set pressure valve provides reliable emergency pressure relief for 250-gallon, 500-gallon, and 1000-gallon propane and LPG storage containers commonly used in gas distribution, cylinder filling operations, and mobile storage applications.<\/p>\n<p>As an authorized distributor of genuine RegO products, DMC Gas supplies factory-original 8685G valves that meet strict ASME Section VIII pressure vessel protection standards for liquefied petroleum gas service.<\/p>\n<h2 data-pm-slice=\"1 1 []\">Applications &amp; Installation<\/h2>\n<h3>Where to Use the RegO 8685G Safety Valve<\/h3>\n<p>The RegO 8685G is engineered for primary pressure relief in the following LPG\/propane applications:<\/p>\n<ul class=\"tight\" data-tight=\"true\">\n<li><strong>ASME Portable Storage Tanks<\/strong> &#8211; Standard primary relief device for 250-1000 gallon ASME code tanks<\/li>\n<li><strong>LPG Distribution Operations<\/strong> &#8211; Bulk delivery trucks and transport tanks<\/li>\n<li><strong>Cylinder Filling Stations<\/strong> &#8211; Bulk storage tanks at propane filling plants<\/li>\n<li><strong>Mobile &amp; Skid-Mounted Tanks<\/strong> &#8211; Temporary and portable LPG storage units<\/li>\n<li><strong>OEM Replacement<\/strong> &#8211; Direct factory replacement for original tank-mounted relief valves<\/li>\n<li><strong>Propane Bobtails &amp; Delivery Vehicles<\/strong> &#8211; Transport tank overpressure protection<\/li>\n<\/ul>\n<h3>Installation Notes<\/h3>\n<p>The 8685G features a semi-internal design with 1-1\/4&#8243; male NPT connection for straightforward installation into standard tank coupling. Downward discharge direction directs vented gas safely away from personnel and equipment. Always verify tank compatibility and local code requirements before installation. For installation guidance, contact our technical support team.<\/p>\n<h2 data-pm-slice=\"1 1 []\">Design Features &amp; Benefits<\/h2>\n<h3>Pop-Action Discharge Mechanism<\/h3>\n<p>Unlike gradual-opening relief valves, the <strong>8685G utilizes a pop-action design<\/strong> that snaps fully open immediately when tank pressure reaches the 250 PSIG set point. This rapid full-opening action:<\/p>\n<ul class=\"tight\" data-tight=\"true\">\n<li><strong>Minimizes product loss<\/strong> by quickly reducing overpressure and reseating promptly<\/li>\n<li><strong>Prevents simmering<\/strong> (partial opening at near-set pressure) that causes seat wear<\/li>\n<li><strong>Ensures full rated flow<\/strong> immediately upon activation for maximum protection<\/li>\n<li><strong>Provides reliable resealing<\/strong> after pressure normalization to prevent ongoing leakage<\/li>\n<\/ul>\n<h3>Corrosion-Resistant Construction<\/h3>\n<p>Engineered for long service life in demanding LPG environments:<\/p>\n<ul class=\"tight\" data-tight=\"true\">\n<li><strong>Forged brass valve body<\/strong> provides excellent corrosion resistance and mechanical strength<\/li>\n<li><strong>Stainless steel stem<\/strong> resists corrosion and galling for smooth operation<\/li>\n<li><strong>Steel spring<\/strong> maintains consistent tension over thousands of cycles<\/li>\n<li><strong>Resilient rubber seat seal<\/strong> ensures bubble-tight closure after repeated activations<\/li>\n<li>All materials selected for compatibility with propane and LPG mixtures per NFPA 58 standards<\/li>\n<\/ul>\n<h3>ASME Code Compliance<\/h3>\n<p>The 8685G is designed to meet ASME pressure vessel protection requirements:<\/p>\n<ul class=\"tight\" data-tight=\"true\">\n<li>Set pressure tolerance within ASME Code allowances (\u00b13% for pressures above 70 PSI)<\/li>\n<li>Flow capacity certified to meet or exceed minimum required relief rates for applicable tank sizes<\/li>\n<li>Suitable for use as the primary relief device per NFPA 58 Liquefied Petroleum Gas Code<\/li>\n<\/ul>\n<hr \/>\n<h2>Technical Specifications Detail<\/h2>\n<h3>Pressure Ratings<\/h3>\n<ul class=\"tight\" data-tight=\"true\">\n<li><strong>Start-to-discharge pressure:<\/strong> 250 PSIG (17.2 bar)<\/li>\n<li><strong>Rated flow capacity:<\/strong> 4385 SCFM (Standard Cubic Feet per Minute) air<\/li>\n<li><strong>Recommended maximum operating pressure:<\/strong> \u2264225 PSIG (90% of set pressure per API 527)<\/li>\n<li><strong>Overpressure for full flow:<\/strong> 10% above set pressure (pop-action characteristic)<\/li>\n<\/ul>\n<h3>Materials of Construction<\/h3>\n<table>\n<colgroup>\n<col \/>\n<col \/><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">Component<\/th>\n<th colspan=\"1\" rowspan=\"1\">Material<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Valve Body<\/td>\n<td colspan=\"1\" rowspan=\"1\">Forged Brass<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Valve Stem<\/td>\n<td colspan=\"1\" rowspan=\"1\">Stainless Steel<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Spring<\/td>\n<td colspan=\"1\" rowspan=\"1\">High-Tensile Steel<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Seat Disc<\/td>\n<td colspan=\"1\" rowspan=\"1\">Resilient Rubber (LPG-compatible)<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Internal Parts<\/td>\n<td colspan=\"1\" rowspan=\"1\">Corrosion-resistant alloys<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Dimensions &amp; Connection<\/h3>\n<ul class=\"tight\" data-tight=\"true\">\n<li><strong>Inlet Connection:<\/strong> 1-1\/4&#8243; Male NPT (National Pipe Taper)<\/li>\n<li><strong>Nominal Size:<\/strong> DN32<\/li>\n<li><strong>Installation Orientation:<\/strong> Semi-internal mounting<\/li>\n<li><strong>Discharge Direction:<\/strong> Downward<\/li>\n<\/ul>\n<hr \/>\n<h2>Frequently Asked Questions (FAQ)<\/h2>\n<h3>What tanks are compatible with the RegO 8685G relief valve?<\/h3>\n<p>The 8685G is designed as the primary pressure relief device for ASME portable LPG storage tanks in 250-gallon, 500-gallon, and 1000-gallon capacities. It is commonly used on propane delivery trucks, cylinder filling station bulk tanks, mobile storage units, and skid-mounted LPG systems.<\/p>\n<h3>What is the set pressure of the 8685G valve?<\/h3>\n<p>The RegO 8685G has a factory-set start-to-discharge pressure of <strong>250 PSIG<\/strong> (approximately 17.2 bar). This set point is fixed at the factory and should not be field-adjusted.<\/p>\n<h3>What materials are used in the 8685G?<\/h3>\n<p>The valve body is constructed from forged brass for corrosion resistance and durability. Internal components include a stainless steel valve stem, high-tensile steel spring, and LPG-compatible resilient rubber seat seal. This material combination is specifically selected for long life in propane and LPG service.<\/p>\n<h3>Can the 8685G be used on propane tanks?<\/h3>\n<p>Yes. The 8685G is ASME-rated specifically for liquefied petroleum gas (LPG) service, which includes propane, butane, and propane-butane mixtures. It is the standard primary relief valve for many ASME portable propane tank applications.<\/p>\n<h3>What is the flow capacity of the 8685G?<\/h3>\n<p>The RegO 8685G has a rated flow capacity of <strong>4385 SCFM<\/strong> (cubic feet per minute of air at standard conditions), providing sufficient overpressure protection for 250-1000 gallon ASME tanks per code requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Brand: REGO<br \/>\nModel: 8586G\u00a0[product_badge]<br \/>\nSet pressure: 250psi (17.2 bar)<br \/>\nConnection size: 1-1\/4 &#8220;(DN32)<br \/>\nValve body material: brass<br \/>\nApplicable medium: LPG<br \/>\nInstallation location: ASME portable storage tank<\/p>\n<p><a href=\"https:\/\/dmcgas.com\/wp-content\/uploads\/2026\/01\/qr-code-wechat-dmccn-150x150-1.jpeg\"><img decoding=\"async\" class=\" wd-lazy-fade alignnone size-full wp-image-18741\" src=\"https:\/\/dmcgas.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/dmcgas.com\/wp-content\/uploads\/2026\/01\/qr-code-wechat-dmccn-150x150-1.jpeg\" alt=\"\" width=\"150\" height=\"150\" \/><\/a><\/p>\n","protected":false},"featured_media":19904,"template":"","meta":{"_acf_changed":false},"product_brand":[230],"product_cat":[175],"product_tag":[195],"class_list":["post-19912","product","type-product","status-publish","has-post-thumbnail","product_brand-rego-en","product_cat-valve","product_tag-rego-en","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product\/19912","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":2,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product\/19912\/revisions"}],"predecessor-version":[{"id":19914,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product\/19912\/revisions\/19914"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/media\/19904"}],"wp:attachment":[{"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/media?parent=19912"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product_brand?post=19912"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product_cat?post=19912"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product_tag?post=19912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}