{"id":19953,"date":"2026-10-22T15:30:37","date_gmt":"2026-10-22T07:30:37","guid":{"rendered":"https:\/\/dmcgas.com\/?post_type=product&#038;p=19953"},"modified":"2026-10-22T15:56:55","modified_gmt":"2026-10-22T07:56:55","slug":"rego-excess-flow-valve-1519a4","status":"publish","type":"product","link":"https:\/\/dmcgas.com\/en\/product\/rego-excess-flow-valve-1519a4\/","title":{"rendered":"REGO 1519A4 Excess Flow Valves for Liquid or Vapor Line Service"},"content":{"rendered":"<h3>Application: where an in-line valve is the only option<\/h3>\n<p>A tank-mounted excess flow valve protects the tank connection. It cannot protect what happens 200 feet downstream. The 1519 series is built for that gap:\u00a0<strong>top installation, in any position, on liquid or vapor service lines<\/strong>, for long runs or branch piping where a tank-mounted valve cannot suffice.<\/p>\n<p>Typical duty: bulk plant and cylinder-filling headers, vapor equalizing lines, branch drops off a main run, and any line where a single tank valve would leave a long unprotected section.<\/p>\n<h3>Features: what each design detail actually does<\/h3>\n<ul>\n<li><strong>Precision-machined poppet, stem and guide.<\/strong>\u00a0The poppet only closes at its rated flow if the guide holds it square; a machined fit is what keeps closure repeatable instead of drifting with wear.<\/li>\n<li><strong>Generous flow channels.<\/strong>\u00a0Full-area passages keep pressure drop low, so the valve does not become the bottleneck on a long liquid run.<\/li>\n<li><strong>Cotter pin through the spring retainer.<\/strong>\u00a0Vibration on a pump or compressor line can walk a retainer out of its groove; the pin removes that failure path.<\/li>\n<li><strong>Stainless steel spring.<\/strong>\u00a0A spring that does not corrode or relax holds the same closing flow over its service life \u2014 which is the whole point of a safety device.<\/li>\n<\/ul>\n<h3>Materials<\/h3>\n<div class=\"outer-table\">\n<table>\n<thead>\n<tr>\n<th>\n<div>Component<\/div>\n<\/th>\n<th>\n<div>1519A \/ 1519B series<\/div>\n<\/th>\n<th>\n<div>A1519 series<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<div>Body<\/div>\n<\/td>\n<td>\n<div>Brass<\/div>\n<\/td>\n<td>\n<div>Cadmium-plated steel<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<div>Valve poppet with stem<\/div>\n<\/td>\n<td>\n<div>Brass<\/div>\n<\/td>\n<td>\n<div>\u2014<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<div>Valve disc<\/div>\n<\/td>\n<td>\n<div>\u2014<\/div>\n<\/td>\n<td>\n<div>Cadmium-plated steel<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<div>Stem<\/div>\n<\/td>\n<td>\n<div>\u2014<\/div>\n<\/td>\n<td>\n<div>Stainless steel<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<div>Spring<\/div>\n<\/td>\n<td>\n<div>Stainless steel<\/div>\n<\/td>\n<td>\n<div>Stainless steel<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<div>Guide<\/div>\n<\/td>\n<td>\n<div>Brass<\/div>\n<\/td>\n<td>\n<div>Ductile iron<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>FAQ<\/h2>\n<p><strong>What is an in-line excess flow valve used for?<\/strong><br \/>\nIt protects a long run or branch line that a tank-mounted valve cannot reach. The 1519 series installs on top of liquid or vapor LPG lines, in any position, and closes when flow exceeds its rated closing flow.<\/p>\n<p><strong>Which size do I need for a 2 in LPG line?<\/strong><br \/>\nTwo models fit 2 in NPT: 1519A4 \/ A1519A4 at 100 GPM liquid propane closing flow, and 1519B4 \/ A1519B4 at 133 GPM. Choose by the flow the line must pass, not by pipe size alone \u2014 same 2 in body, 33% difference in closing flow.<\/p>\n<p><strong>What is the difference between 1519A and 1519B?<\/strong><br \/>\nOnly the closing flow. 1519A4 closes at 100 GPM propane, 1519B4 at 133 GPM, in the same 2 in body with the same 4 13\/16 in effective length. The 1519B exists only in the 2 in size.<\/p>\n<p><strong>What is the difference between 1519 and A1519?<\/strong><br \/>\nBody material. 1519A \/ 1519B use a brass body, brass poppet with integral stem and brass guide. A1519 uses a cadmium-plated steel body and disc, stainless steel stem and ductile iron guide. Flow ratings are the same for equivalent sizes.<\/p>\n<p><strong>Can it be installed vertically or at an angle?<\/strong><br \/>\nYes. It is designed for top installation in any position. Published closing flows are based on horizontal installation; outlet up gives slightly more flow, outlet down slightly less.<\/p>\n<p><strong>What are the closing flows at 25 and 100 PSIG?<\/strong><br \/>\nFrom 5,000 \/ 8,500 SCFH on the 1 in model up to 45,000 \/ 82,000 SCFH on the 3 in A1519A6. The 100 PSIG figure runs 1.70\u20131.82\u00d7 the 25 PSIG figure across the range.<\/p>\n<p><strong>Does the rating apply to butane or anhydrous ammonia?<\/strong><br \/>\nFor liquid service, multiply the propane liquid flow by 0.94 for butane and 0.90 for anhydrous ammonia. The factors are published for liquid flow only, not vapor.<\/p>\n<p><strong>Is it UL Listed, and what warranty does it carry?<\/strong><br \/>\nYes \u2014 UL Listed, and covered by RegO&#8217;s 10-year warranty.<\/p>\n<p><strong>What connections does it have?<\/strong><br \/>\nInlet NPT, outlet female NPT, in 1, 1\u00bd, 2 and 3 in.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Brand: REGO<br \/>\nModel: 1519A4[product_badge]<br \/>\nConnection size: 2 &#8220;NPT<br \/>\nMaterial: Brass<br \/>\nTemperature range: -40 \u2103~73 \u2103<br \/>\nApplicable occasions:Liquid or Vapor Line Service<\/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":19945,"template":"","meta":{"_acf_changed":false},"product_brand":[230],"product_cat":[175],"product_tag":[195],"class_list":["post-19953","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\/19953","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":1,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product\/19953\/revisions"}],"predecessor-version":[{"id":19954,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product\/19953\/revisions\/19954"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/media\/19945"}],"wp:attachment":[{"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/media?parent=19953"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product_brand?post=19953"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product_cat?post=19953"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/dmcgas.com\/en\/wp-json\/wp\/v2\/product_tag?post=19953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}