{"id":3069,"date":"2025-03-18T09:10:17","date_gmt":"2025-03-18T01:10:17","guid":{"rendered":"https:\/\/www.shopvalves.com\/product\/spirax-sarco-brv2s-and-brv2b-sg-iron-pressure-reducing-valve\/"},"modified":"2026-03-24T11:34:01","modified_gmt":"2026-03-24T03:34:01","slug":"spirax-sarco-brv2s-and-brv2b-sg-iron-pressure-reducing-valve","status":"publish","type":"product","link":"https:\/\/www.shopvalves.com\/en\/product\/spirax-sarco-brv2s-and-brv2b-sg-iron-pressure-reducing-valve\/","title":{"rendered":"Spirax Sarco Spirax Sarco BRV2S and BRV2B Ductile Iron Pressure Reducing Valves Flange"},"content":{"rendered":"<p>Spirax Sarco BRV2S and BRV2B Ductile Iron Pressure Reducing Valves are direct acting pressure reducing valves for gases such as steam or compressed air, with a ductile iron body, available with flanged and threaded connections.The BRV2S is available with a stainless steel bellows, the BRV2B with a phosphor bronze bellows, and optional BRV2SP and BRV2BP models with an external inductor tube. Three set pressure ranges are available downstream, distinguished by signage colors.<\/p>\n<h3>Available Models<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align:left\">Available types<\/th>\n<th style=\"text-align:left\">SKU<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align:left\">DN15 BRV2S GREY (0.14 - 1.7 bar g)<\/td>\n<td style=\"text-align:left\">0457393<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN15 BRV2S GREEN (1.40 - 4.0 bar)<\/td>\n<td style=\"text-align:left\">0457493<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN15 BRV2S ORG (3.50 - 8.6 bar g)<\/td>\n<td style=\"text-align:left\">0457593<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN20 BRV2S GREY (0.14 - 1.7 bar g)<\/td>\n<td style=\"text-align:left\">0458393<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN20 BRV2S GREEN (1.40 - 4.0 bar)<\/td>\n<td style=\"text-align:left\">0458493<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN20 BRV2S ORG (3.50 - 8.6 bar g)<\/td>\n<td style=\"text-align:left\">0458593<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN25 BRV2S GREY (0.14 - 1.7 bar g)<\/td>\n<td style=\"text-align:left\">0459393<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN25 BRV2S GREEN (1.40 - 4.0 bar)<\/td>\n<td style=\"text-align:left\">0459493<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:left\">DN25 BRV2S ORG (3.50 - 8.6 bar g)<\/td>\n<td style=\"text-align:left\">0459593<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Downstream control pressure range<\/h3>\n<table>\n<thead>\n<tr>\n<th>color<\/th>\n<th>Pressure range<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>grizzly<\/td>\n<td>0.14 - 1.7 bar g<\/td>\n<\/tr>\n<tr>\n<td>greener<\/td>\n<td>1.40 - 4.0 bar g<\/td>\n<\/tr>\n<tr>\n<td>orange (color)<\/td>\n<td>3.50 - 8.6 bar g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Note: When the set pressure ranges overlap, it is better to use a lower range spring control. The products are fully compliant with the European Pressure Equipment Directive 97 \/ 23 \/ EC, with CE marking as required, and standard products with manufacturer's typical test certificates, which need to be specified when placing an order with the required certificates and test requirements.<\/p>\n<h3>Sizes and pipe connections<\/h3>\n<ul>\n<li>\u00bd\", \u00be\" and 1\": Screwed BSP (BS 21 Rp) or NPT<\/li>\n<li>DN15, DN20 and DN25: Flange EN 1092 PN25<\/li>\n<\/ul>\n<h3>Pressure\/Temperature Limits<\/h3>\n<table>\n<thead>\n<tr>\n<th>sports event<\/th>\n<th>parameters<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Valve body design conditions<\/td>\n<td>PN25<\/td>\n<\/tr>\n<tr>\n<td>PMA Maximum Allowable Pressure<\/td>\n<td>25 bar g @ 120 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>TMA Maximum Allowable Temperature<\/td>\n<td>210 \u00b0C @ 19 bar g<\/td>\n<\/tr>\n<tr>\n<td>Minimum permissible temperature<\/td>\n<td>-10 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>PMO Maximum Working Pressure under Saturated Steam<\/td>\n<td>19 bar g @ 210 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>TMO Maximum Operating Temperature<\/td>\n<td>210 \u00b0C @ 19 bar g<\/td>\n<\/tr>\n<tr>\n<td>Minimum working temperature<\/td>\n<td>0 \u00b0C (below this temperature, consult Spirax Sarco)<\/td>\n<\/tr>\n<tr>\n<td>Maximum downstream set pressure<\/td>\n<td>8.6 bar g<\/td>\n<\/tr>\n<tr>\n<td>Maximum differential pressure<\/td>\n<td>19 bar<\/td>\n<\/tr>\n<tr>\n<td>Recommended Maximum Pressure Reduction Ratio (at maximum flow)<\/td>\n<td>10 : 1<\/td>\n<\/tr>\n<tr>\n<td>Design maximum cold hydraulic test pressure<\/td>\n<td>38 bar g (test pressure not allowed to exceed 19 bar g with internal components installed)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>material (that sth is made of)<\/h3>\n<table>\n<thead>\n<tr>\n<th>Item<\/th>\n<th>Part<\/th>\n<th>material (that sth is made of)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>spring chamber<\/td>\n<td>Aluminum - Epoxy Coated LM24<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Adjustment handwheel<\/td>\n<td>polypropylene<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Upper spring plate<\/td>\n<td>Cast iron DIN 1691 GG 20<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>Pressure regulating spring<\/td>\n<td>Silicon Chromium BS 2803 685 A55, Spring Steel, Stainless Steel 316T\/316L<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>Bellows group washers<\/td>\n<td>Stainless steel reinforced with laminated graphite<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>Spring chamber bolt (M8 \u00d7 25mm)<\/td>\n<td>Galvanized steel BS 3692 Gr. 8.8<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>valve body<\/td>\n<td>Ductile iron DIN 1693 GGG 40.3<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>Conical Washers<\/td>\n<td>Stainless Steel ASTM A276 316L<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>top bar<\/td>\n<td>Stainless Steel ASTM A276 316L<\/td>\n<\/tr>\n<tr>\n<td>11<\/td>\n<td>Seat<\/td>\n<td>Stainless steel BS 970 431 S29<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>Seat gasket<\/td>\n<td>Stainless steel BS 1449 316 S11<\/td>\n<\/tr>\n<tr>\n<td>13<\/td>\n<td>spool<\/td>\n<td>Stainless steel AISI 420<\/td>\n<\/tr>\n<tr>\n<td>14<\/td>\n<td>Spool return spring<\/td>\n<td>Stainless steel BS 20056 316 S42<\/td>\n<\/tr>\n<tr>\n<td>15<\/td>\n<td>filter<\/td>\n<td>Stainless steel BS 1449 316 SH<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td>plug<\/td>\n<td>Stainless steel BS 970 431 S29<\/td>\n<\/tr>\n<tr>\n<td>17<\/td>\n<td>Compression Mount Assembly<\/td>\n<td>brass<\/td>\n<\/tr>\n<tr>\n<td>18<\/td>\n<td>Spring range color signage<\/td>\n<td>polypropylene<\/td>\n<\/tr>\n<tr>\n<td>19<\/td>\n<td>partitions<\/td>\n<td>Stainless Steel 316L<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>a peg<\/td>\n<td>Copper Plated Mild Steel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Note: Items 10, 11, 13, 14, 15 and 19 are parts in an assembly.<\/p>\n<h3>Flow rate for safety valve sizing<\/h3>\n<p>Full open flow rate is used for safety valve selection, Kvs value: 1.5 for DN15, 2.5 for DN20, 3.0 for DN25.<br \/>\nConvert the formula:<\/p>\n<ul>\n<li>Cv (US) = Kv x 1.156<\/li>\n<li>Cv (UK) = Kv x 0.963<\/li>\n<\/ul>\n<h3>weights<\/h3>\n<table>\n<thead>\n<tr>\n<th>caliber<\/th>\n<th>Threaded connection weight (kg)<\/th>\n<th>Flange connection weight(kg)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DN15 - \u00bd\"<\/td>\n<td>1.60<\/td>\n<td>3.90<\/td>\n<\/tr>\n<tr>\n<td>DN20 - \u00be\"<\/td>\n<td>1.70<\/td>\n<td>4.25<\/td>\n<\/tr>\n<tr>\n<td>DN25 - 1\"<\/td>\n<td>1.95<\/td>\n<td>4.65<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Installation Instructions<\/h3>\n<p>Install the pressure reducing valve on horizontal piping in the direction of flow according to the arrow on the valve body.BRV2SP\/BRV2BP When using an external inductor tube, remove the plug (16) and install the 6mm O\/D compression mount (17).The other end of the 6mm inductor tube should be installed in the piping at least 1m downstream of the valve.<\/p>\n<h3>Ordering Instructions<\/h3>\n<p>Order according to the description in the table of available spare parts, stating the size, type and pressure range of the pressure reducing valve. Example: Regulating spring for pressure reducing valve DN15 BRV2, pressure range 3.5 - 8.6 bar g (orange); 1 - Pressure reducing valve DN15 BRV2S, ductile iron body, flanged connection EN1092 PN25, stainless steel bellows, fitted with orange spring (3.5 - 8.6 bar g).<\/p>\n<p>Detailed safety information, installation and maintenance are provided in the Installation and Maintenance Guide (IM-P045-10) supplied with the product.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/03\/img_3-1.png\" alt=\"Spirax Sarco BRV2S Ductile Iron Flanged Pressure Reducing Valve - Diagrams\" width=\"592\" height=\"1120\" class=\"alignnone size-full wp-image-5155\" srcset=\"https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/03\/img_3-1.png 592w, https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/03\/img_3-1-159x300.png 159w, https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/03\/img_3-1-541x1024.png 541w, https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/03\/img_3-1-6x12.png 6w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><\/p>\n<p><!-- \u6280\u672f\u8d44\u6599\u4e0b\u8f7d\u533a\u5757 --><\/p>\n<div class=\"valve-documents\">\n<h3 class=\"doc-title\">Technical Data Download<\/h3>\n<div class=\"doc-links\">\n<a href=\"https:\/\/doc.shopvalves.com\/BRV2S_BRV2B-TI-P045-14-EN.pdf\" class=\"doc-link\" target=\"_blank\">BRV2S_BRV2B-TI-P045-14-EN.pdf<\/a><br \/><a href=\"https:\/\/doc.shopvalves.com\/TI-P045-14-Chinese.pdf\" class=\"doc-link\" target=\"_blank\">TI-P045-14-Chinese.pdf<\/a>    <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Spirax Sarco Spirax Sarco BRV2S and BRV2B ductile iron pressure reducing valves are direct acting pressure reducing valves for steam or compressed air...<\/p>","protected":false},"featured_media":3577,"template":"","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"product_brand":[24],"product_cat":[103,50],"product_tag":[58,59,65],"class_list":{"0":"post-3069","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-spirax-sarco","7":"product_cat-pressure-reducing-and-surplussing-valves","8":"product_cat-control-systems","9":"product_tag-spiraxsarco-pressure-reducing-valves","10":"product_tag-spiraxsarco-steam-pressure-reducing-valves","11":"product_tag-spiraxsarco-valves","13":"first","14":"instock","15":"shipping-taxable","16":"purchasable","17":"product-type-variable","18":"entry","19":"content-bg","20":"loop-entry"},"_links":{"self":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product\/3069","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media\/3577"}],"wp:attachment":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media?parent=3069"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_brand?post=3069"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_cat?post=3069"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_tag?post=3069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}