{"id":4996,"date":"2025-07-17T09:05:35","date_gmt":"2025-07-17T01:05:35","guid":{"rendered":"https:\/\/www.shopvalves.com\/?post_type=product&#038;p=4996"},"modified":"2026-03-24T10:51:08","modified_gmt":"2026-03-24T02:51:08","slug":"spirax-sarco-bcv1","status":"publish","type":"product","link":"https:\/\/www.shopvalves.com\/en\/product\/spirax-sarco-bcv1\/","title":{"rendered":"Spirax Sarco Spirax Sarco BCV1 1\/2 \"BSP 230V and BCV20 Drain Solenoid Valve"},"content":{"rendered":"<p>Spirax Sarco Spirax Sarco BCV1 and BCV20 drain valves are small bore, normally closed valves with brass bodies and corrosion-resistant internal parts, primarily used for low and medium pressure boiler drain applications.The BCV1 and BCV20 are identical except for the orifice dimensions, which are 3mm (1\/8\") for the BCV1 and 6mm (\u00bc\") for the BCV20. The valves come with a power connector and are IP65 rated for (3x1mm) (18AWG) cable.<\/p>\n<h3>Delivery dimensions and connections<\/h3>\n<ul>\n<li>\u00bd\" Threaded Connection Model BSP-230V<\/li>\n<li>\u00bd\" Threaded Connection Model BSP-110V<\/li>\n<li>\u00bd\" Threaded Connection NPT-120V Type<\/li>\n<li>\u00bd\" Threaded NPT-120V (UL\/CSA)<\/li>\n<\/ul>\n<h3>restrictive condition<\/h3>\n<h4>BCV1<\/h4>\n<ul>\n<li>Maximum boiler or steam pressure: 14 bar g (203 psi g) (cyclic operation)<\/li>\n<li>Medium Temperature: -40-+200\u00b0C (-40- +392\u00b0F)<\/li>\n<li>Medium: water and steam<\/li>\n<li>Maximum ambient temperature: 55\u00b0C (130\u00b0F)<\/li>\n<\/ul>\n<h4>BCV1 (UL\/CSA)<\/h4>\n<table>\n<thead>\n<tr>\n<th>Maximum boiler or steam pressure<\/th>\n<th>9 bar g (130 psi g)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Medium temperature<\/td>\n<td>-40-+180 \u00b0C (-40- +356 \u00b0F)<\/td>\n<\/tr>\n<tr>\n<td>medium<\/td>\n<td>Water and steam<\/td>\n<\/tr>\n<tr>\n<td>Maximum ambient temperature<\/td>\n<td>55 \u00b0C (130 \u00b0F)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>BCV20<\/h4>\n<table>\n<thead>\n<tr>\n<th>Maximum boiler or steam pressure<\/th>\n<th>4 bar g (58 psi g)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Medium temperature<\/td>\n<td>-40-+180 \u00b0C (-40- +356 \u00b0F)<\/td>\n<\/tr>\n<tr>\n<td>medium<\/td>\n<td>Water and steam<\/td>\n<\/tr>\n<tr>\n<td>Maximum ambient temperature<\/td>\n<td>55 \u00b0C (130 \u00b0F)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Electrical parameters<\/h3>\n<table>\n<thead>\n<tr>\n<th>230 V<\/th>\n<th>207 V - 253 V<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>110 V type<\/td>\n<td>99 V - 121 V<\/td>\n<\/tr>\n<tr>\n<td>120 V<\/td>\n<td>108 V - 132 V<\/td>\n<\/tr>\n<tr>\n<td>frequency<\/td>\n<td>50 - 60 Hz<\/td>\n<\/tr>\n<tr>\n<td>maximum power<\/td>\n<td>40 VA (startup); 16 VA\/12 W (continuous)<\/td>\n<\/tr>\n<tr>\n<td>Protection level<\/td>\n<td>IP65 (Nema 4)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>material (that sth is made of)<\/h3>\n<table>\n<thead>\n<tr>\n<th>Part<\/th>\n<th>material (that sth is made of)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>valve body<\/td>\n<td>brass<\/td>\n<\/tr>\n<tr>\n<td>soft seal<\/td>\n<td>PTFE<\/td>\n<\/tr>\n<tr>\n<td>internal part<\/td>\n<td>stainless steels<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Weight (approximate)<\/h3>\n<p>0.75 kg (1.65 Ibs)<\/p>\n<h3>quantitative (science)<\/h3>\n<table>\n<thead>\n<tr>\n<th>Available types<\/th>\n<th>BCV1<\/th>\n<th>BCV20<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Orifice Size<\/td>\n<td>3 mm ( 1 \/ 8 \")<\/td>\n<td>6 mm (\u00bc\")<\/td>\n<\/tr>\n<tr>\n<td>Kv value<\/td>\n<td>0.25<\/td>\n<td>0.8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>[math: C_{V}(U K) = K_{V} \u00d7 0.963 C_{V}(U S) = K_{V} \u00d7 1.156]<\/p>\n<p>When used for boiler discharge, the capacity is shown in the table below:<\/p>\n<table>\n<thead>\n<tr>\n<th>Boiler pressure bar g (psi g)<\/th>\n<th>Displacement kg\/h (Ib\/h)<\/th>\n<th><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><\/td>\n<td>BCV1<\/td>\n<td>BCV20<\/td>\n<\/tr>\n<tr>\n<td>1 (14.5)<\/td>\n<td>175 (385)<\/td>\n<td>560 (1232)<\/td>\n<\/tr>\n<tr>\n<td>2 (290)<\/td>\n<td>250 (550)<\/td>\n<td>790 (1738)<\/td>\n<\/tr>\n<tr>\n<td>4 (580)<\/td>\n<td>350 (770)<\/td>\n<td>1120 (2464)<\/td>\n<\/tr>\n<tr>\n<td>6 (870)<\/td>\n<td>385 (847)<\/td>\n<td>-<\/td>\n<\/tr>\n<tr>\n<td>8 (1160)<\/td>\n<td>445 (979)<\/td>\n<td>-<\/td>\n<\/tr>\n<tr>\n<td>10 (1450)<\/td>\n<td>495 (1089)<\/td>\n<td>-<\/td>\n<\/tr>\n<tr>\n<td>14 (2030)<\/td>\n<td>590 (1298)<\/td>\n<td>-<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>When BCV20 is used downstream of the BCS2 discharge control system and steam trap, the discharge capacity table is as follows:<\/p>\n<table>\n<thead>\n<tr>\n<th>Pressure head through valve m (ft)<\/th>\n<th>Cold water discharge kg\/h (Ib\/h)<\/th>\n<th>Hot water with flash steam discharge kg\/h (Ib\/h)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1 (3)<\/td>\n<td>253 (557)<\/td>\n<td>63 (138)<\/td>\n<\/tr>\n<tr>\n<td>2 (6)<\/td>\n<td>358 (787)<\/td>\n<td>90 (198)<\/td>\n<\/tr>\n<tr>\n<td>3 (9)<\/td>\n<td>438 (963)<\/td>\n<td>110 (242)<\/td>\n<\/tr>\n<tr>\n<td>5 (15)<\/td>\n<td>566 (1245)<\/td>\n<td>142 (312)<\/td>\n<\/tr>\n<tr>\n<td>10 (30)<\/td>\n<td>800 (1760)<\/td>\n<td>200 (440)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Product Description<\/h3>\n<h4>BCV1<\/h4>\n<p>Spirax Sarco normally closed drain solenoid valves, available in types BCV1 and BCV1 (UL\/CSA), with brass body, stainless steel seat and PTFE seal.<\/p>\n<h4>BCV20<\/h4>\n<p>Spirax Sarco normally closed, low pressure drain valve type BCV20 with brass body, stainless steel seat and PTFE seal.<\/p>\n<h3>Ordering Instructions<\/h3>\n<p>Example: 1 - Spirax Sarco BCV1 or BCV20 drain valve BSP threaded connection 230V 50-60Hz.<\/p>\n<h3>Spare parts available<\/h3>\n<table>\n<thead>\n<tr>\n<th>Spare Parts<\/th>\n<th>item number<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Iron core and spring mechanism<\/td>\n<td>4034080<\/td>\n<\/tr>\n<tr>\n<td>Inductive coil 230 V<\/td>\n<td>4034081<\/td>\n<\/tr>\n<tr>\n<td>Coil 110\/120 V<\/td>\n<td>4034082<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Order spare parts<\/h3>\n<p>See available spare parts list for valve model number<br \/>\nExample: 1 - Iron core spring unit (item no. 4034080) for Spirax Sarco BCV20 drain valve.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-5001\" src=\"https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/07\/img_1-1.png\" alt=\"Spirax Sarco Spirax Sarco BCV1 Drain Valve Structural Drawing\" width=\"660\" height=\"780\" srcset=\"https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/07\/img_1-1.png 660w, https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/07\/img_1-1-254x300.png 254w, https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/07\/img_1-1-10x12.png 10w, https:\/\/www.shopvalves.com\/wp-content\/uploads\/2025\/07\/img_1-1-600x709.png 600w\" sizes=\"(max-width: 660px) 100vw, 660px\" \/><\/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\"><a class=\"doc-link\" href=\"https:\/\/doc.shopvalves.com\/BCV1_BCV20-TI-P403-60-EN.pdf\" target=\"_blank\" rel=\"noopener\">BCV1_BCV20-TI-P403-60-EN.pdf<\/a><br \/>\n<a class=\"doc-link\" href=\"https:\/\/doc.shopvalves.com\/TI-P403-60-Chinese.pdf\" target=\"_blank\" rel=\"noopener\">TI-P403-60-Chinese.pdf<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Spirax Sarco Spirax Sarco BCV1 and BCV20 drain valves are small bore, normally closed valves with brass bodies and corrosion resistant internal parts...<\/p>","protected":false},"featured_media":5385,"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":[96,46],"product_tag":[],"class_list":{"0":"post-4996","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-spirax-sarco","7":"product_cat-tds-blowdown-controls","8":"product_cat-boiler-controls-and-systems","10":"first","11":"instock","12":"sale","13":"shipping-taxable","14":"purchasable","15":"product-type-variable","16":"entry","17":"content-bg","18":"loop-entry"},"_links":{"self":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product\/4996","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\/5385"}],"wp:attachment":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media?parent=4996"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_brand?post=4996"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_cat?post=4996"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_tag?post=4996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}