{"id":2143,"date":"2026-10-04T15:35:49","date_gmt":"2026-10-04T15:35:49","guid":{"rendered":"https:\/\/yocl.com\/?post_type=product&#038;p=2143"},"modified":"2026-10-04T15:35:59","modified_gmt":"2026-10-04T15:35:59","slug":"waterproof-breather-explosion-relief-valves","status":"publish","type":"product","link":"https:\/\/yocl.com\/ar\/product\/waterproof-breather-explosion-relief-valves\/","title":{"rendered":"MS Series Waterproof Breather &amp; Explosion Relief Valves"},"content":{"rendered":"<h2>\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629<\/h2>\n<p>YOCL Electric waterproof breather and explosion relief valves combine routine enclosure pressure equalization with pressure relief during internal pressure buildup. The MS series includes eight threaded metal valves and the MS-FBFSL-F550 battery pack PRV vent.<\/p>\n<p>The threaded valves use an e-PTFE membrane for normal breathing. At the relief threshold, internal pressure opens a built-in piston to release gas through a direct passage. The valve returns to its normal breathing state after pressure falls below the threshold.<\/p>\n<p>The F550 PRV is designed for battery boxes, with a PP+GF30 body, a 304 stainless steel cover and a silicone sealing ring. Its specifications are listed separately below.<\/p>\n<h2>\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n<ul>\n<li>Normal membrane breathing helps equalize pressure inside and outside the enclosure.<\/li>\n<li>Threaded models provide a pressure-actuated relief passage and return to normal operation after pressure falls.<\/li>\n<li>Eight threaded models offer 304 stainless steel or 6061 aluminium bodies.<\/li>\n<li>IP67 protection is specified for the threaded valves and the F550 PRV.<\/li>\n<li>The battery pack PRV combines pressure balancing with gas release following abnormal battery-cell venting.<\/li>\n<\/ul>\n<h2>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0641\u0646\u064a\u0629<\/h2>\n<h3>Threaded Valve Models<\/h3>\n<p>Air permeability is measured at <strong>70 mbar<\/strong>. Each value is a minimum for the corresponding model.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0627\u0644\u0645\u0648\u062f\u064a\u0644<\/th>\n<th>Body Material<\/th>\n<th>Metric Thread<\/th>\n<th>Air Permeability at 70 mbar<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>MS-FBFBXG-B10<\/td>\n<td>304 stainless steel<\/td>\n<td>M12 \u00d7 1.5<\/td>\n<td>\u22651200 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-B10<\/td>\n<td>6061 aluminium<\/td>\n<td>M12 \u00d7 1.5<\/td>\n<td>\u2265800 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-B15<\/td>\n<td>6061 aluminium<\/td>\n<td>M20 \u00d7 1.5<\/td>\n<td>\u22651500 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-B25<\/td>\n<td>6061 aluminium<\/td>\n<td>M32 \u00d7 1.5<\/td>\n<td>\u22652000 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-B55<\/td>\n<td>6061 aluminium<\/td>\n<td>M40 \u00d7 1.5<\/td>\n<td>\u22653000 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-H15<\/td>\n<td>6061 aluminium<\/td>\n<td>Specify in enquiry<\/td>\n<td>\u22651200 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-H25<\/td>\n<td>6061 aluminium<\/td>\n<td>M32 \u00d7 1.5<\/td>\n<td>\u22651200 mL\/min<\/td>\n<\/tr>\n<tr>\n<td>MS-FBFLC-H55<\/td>\n<td>6061 aluminium<\/td>\n<td>M40 \u00d7 1.5<\/td>\n<td>\u22653000 mL\/min<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Specify the required mating thread for <strong>MS-FBFLC-H15<\/strong> in the enquiry.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0627\u0644\u0645\u0639\u0644\u0645\u0629<\/th>\n<th>Threaded Valve Specification<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Brand<\/td>\n<td>YOCL \u0643\u0647\u0631\u0628\u0627\u0626\u064a<\/td>\n<\/tr>\n<tr>\n<td>Product type<\/td>\n<td>Waterproof breather and explosion pressure relief valve<\/td>\n<\/tr>\n<tr>\n<td>Protection rating<\/td>\n<td>IP67<\/td>\n<\/tr>\n<tr>\n<td>Pressure-relief opening range<\/td>\n<td>4\u201315 kPa<\/td>\n<\/tr>\n<tr>\n<td>Long-term working temperature<\/td>\n<td>\u221240\u00b0C to +120\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Temperature resistance<\/td>\n<td>\u221240\u00b0C to +150\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Flame retardancy designation<\/td>\n<td>UL 94 V-0<\/td>\n<\/tr>\n<tr>\n<td>Breather membrane<\/td>\n<td>e-PTFE<\/td>\n<\/tr>\n<tr>\n<td>Relief mechanism<\/td>\n<td>Pressure-actuated piston<\/td>\n<\/tr>\n<tr>\n<td>Return to normal breathing<\/td>\n<td>After internal pressure falls below the relief threshold<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The <strong>4\u201315 kPa<\/strong> value is the stated opening-pressure range. Specify the required opening pressure when selecting a model. The air-permeability figures describe membrane breathing at the given test pressure.<\/p>\n<h3>MS-FBFSL-F550 Battery Pack PRV<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u0627\u0644\u0645\u0639\u0644\u0645\u0629<\/th>\n<th>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0627\u0644\u0645\u0648\u062f\u064a\u0644<\/td>\n<td>MS-FBFSL-F550<\/td>\n<\/tr>\n<tr>\n<td>Product type<\/td>\n<td>Battery pack pressure relief vent<\/td>\n<\/tr>\n<tr>\n<td>Main body material<\/td>\n<td>PP+GF30<\/td>\n<\/tr>\n<tr>\n<td>Cover material<\/td>\n<td>304 stainless steel<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u0644\u0648\u0646<\/td>\n<td>\u0623\u0633\u0648\u062f<\/td>\n<\/tr>\n<tr>\n<td>Breathable membrane<\/td>\n<td>e-PTFE<\/td>\n<\/tr>\n<tr>\n<td>Sealing ring<\/td>\n<td>Silicone rubber<\/td>\n<\/tr>\n<tr>\n<td>Protection rating<\/td>\n<td>IP67<\/td>\n<\/tr>\n<tr>\n<td>Air permeability<\/td>\n<td>\u22656000 mL\/min at 7 kPa<\/td>\n<\/tr>\n<tr>\n<td>Pressure specification (WIP)<\/td>\n<td>20\u201350 kPa<\/td>\n<\/tr>\n<tr>\n<td>Temperature resistance<\/td>\n<td>\u221240\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Storage condition<\/td>\n<td>Room temperature<\/td>\n<\/tr>\n<tr>\n<td>Flame retardancy designation<\/td>\n<td>V-0<\/td>\n<\/tr>\n<tr>\n<td>Intended functions<\/td>\n<td>Battery-box pressure equalization and pressure relief following abnormal battery-cell venting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Operating Principle<\/h2>\n<p>During normal operation, the threaded valve allows gas to move through its membrane from the higher-pressure side to the lower-pressure side. This supports outward breathing under positive enclosure pressure and inward breathing under negative enclosure pressure.<\/p>\n<p>When internal pressure reaches the relief threshold, the piston opens a direct gas passage. After pressure decreases, the threaded valve resumes membrane breathing.<\/p>\n<p>The F550 PRV provides battery-box pressure balancing and a relief function for abnormal gas release from battery cells.<\/p>\n<h2>Selection and Ordering<\/h2>\n<p>Provide the following information when requesting a quotation:<\/p>\n<ul>\n<li>Model and quantity.<\/li>\n<li>Required mating thread for a threaded valve, including the H15 configuration.<\/li>\n<li>Required opening pressure and normal breathing performance.<\/li>\n<li>Enclosure service temperature and mounting arrangement.<\/li>\n<li>For the F550 PRV, the required pressure specification and battery-box interface.<\/li>\n<\/ul>\n<p>Select the model using its individual material, breathing value and pressure specification. Use the long-term working-temperature range when assessing continuous service for the threaded models.<\/p>","protected":false},"excerpt":{"rendered":"<p>YOCL Electric waterproof breather and explosion relief valves combine membrane pressure equalization with pressure-actuated gas release. The series includes eight threaded metal models and a separate battery pack PRV configuration.<\/p>\n<ul>\n<li>Threaded valves: IP67, with a 4\u201315 kPa opening-pressure range.<\/li>\n<li>304 stainless steel or 6061 aluminium bodies by model.<\/li>\n<li>Threaded-model air permeability: \u2265800\u20133000 mL\/min at 70 mbar, depending on model.<\/li>\n<li>F550 PRV: PP+GF30 body, 304 stainless steel cover and e-PTFE membrane.<\/li>\n<li>Separate model tables support thread, pressure and temperature selection.<\/li>\n<\/ul>","protected":false},"featured_media":2142,"template":"","meta":[],"product_brand":[],"product_cat":[143],"product_tag":[],"class_list":["post-2143","product","type-product","status-publish","has-post-thumbnail","product_cat-enclosure-vent-plugs","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/product\/2143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/media\/2142"}],"wp:attachment":[{"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/media?parent=2143"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/product_brand?post=2143"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/product_cat?post=2143"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/yocl.com\/ar\/wp-json\/wp\/v2\/product_tag?post=2143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}