{"product_id":"38-brass-in-line-valve-viton-944402v","title":"3\/8 in. Brass Inline Check Valve, Viton | 944402V","description":"\u003cp\u003eThe 3\/8 in. brass inline check valve with Viton seal (part \u003cstrong\u003e944402V\u003c\/strong\u003e) provides compact, spring-loaded backflow prevention where fuels, hydrocarbons, or heat would destroy a standard Buna-N seat — the Viton (FKM) seal runs to a maximum of 325°F and handles 125 psi saturated steam. Rated 400 psi WOG with a low 1\/2 psi cracking pressure, polyetherimide disc, and a patented disc guide that prevents side loading. Female NPT both ends. Made in Italy.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e944402V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e3\/8 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eInline check valve (spring-loaded poppet), brass, Viton seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT × Female NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e400 psi WOG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam Rating\u003c\/td\u003e\n\u003ctd\u003e125 psi saturated steam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Temperature\u003c\/td\u003e\n\u003ctd\u003e325°F (Viton seal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCracking Pressure\u003c\/td\u003e\n\u003ctd\u003e1\/2 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat \/ Seal\u003c\/td\u003e\n\u003ctd\u003eViton (FKM fluoroelastomer) — fuels, hydrocarbons, elevated temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide — corrosion and abrasion resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eDimensions\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Diameter\u003c\/td\u003e\n\u003ctd\u003e0.40\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.18 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eMaterials of Construction\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody \u0026amp; End Connection\u003c\/td\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat\u003c\/td\u003e\n\u003ctd\u003eViton (FKM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003ePerformance \u0026amp; Testing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eViton (FKM) seal — fuels, oils, hydrocarbons, and service heat that Buna-N cannot take\u003c\/li\u003e\n\u003cli\u003eLow 1\/2 psi cracking pressure — opens with minimal upstream pressure\u003c\/li\u003e\n\u003cli\u003eSpring-loaded for fast seating; perfect seating at both high and low pressure\u003c\/li\u003e\n\u003cli\u003ePatented disc guide prevents side loading — stable, chatter-resistant operation\u003c\/li\u003e\n\u003cli\u003eCompact, high-capacity design with a head-loss-minimizing flow profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot lead-free\u003c\/strong\u003e — for potable water supply lines, choose a lead-free certified valve (see Lead-Free Valves in our Valves menu)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"series-sizes\"\u003e\n\u003ch3\u003eOther Sizes in This Series\u003c\/h3\u003e\n\u003cp\u003eBrass Inline Check Valve, Viton (FKM) seal, Female NPT (3\/8\"–4\"; 400 WOG through 2\", 175 WOG above). Jump to another size or add it straight to your cart:\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/8 in. (this page)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e944402V\u003c\/td\u003e\n\u003ctd\u003e$19.99\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/12-brass-in-line-check-viton-944403v\"\u003e1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944403V\u003c\/td\u003e\n\u003ctd\u003e$22.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262549207:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/34-brass-in-line-check-viton-944404v\"\u003e3\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944404V\u003c\/td\u003e\n\u003ctd\u003e$33.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262680279:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-in-brass-inline-check-valve-viton-944405v\"\u003e1 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944405V\u003c\/td\u003e\n\u003ctd\u003e$37.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841076439:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-14-brass-in-line-check-944406v\"\u003e1-1\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944406V\u003c\/td\u003e\n\u003ctd\u003e$65.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262876887:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-1-2-in-brass-inline-check-valve-viton-944407v\"\u003e1-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944407V\u003c\/td\u003e\n\u003ctd\u003e$93.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850546391:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-in-brass-inline-check-valve-viton-944408v\"\u003e2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944408V\u003c\/td\u003e\n\u003ctd\u003e$120.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850611927:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-1-2-in-brass-inline-check-valve-viton-944409v\"\u003e2-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944409V\u003c\/td\u003e\n\u003ctd\u003e$247.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850841303:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-in-brass-inline-check-valve-viton-944410v\"\u003e3 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944410V\u003c\/td\u003e\n\u003ctd\u003e$385.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854347479:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/4-in-brass-inline-check-valve-viton-944411v\"\u003e4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944411V\u003c\/td\u003e\n\u003ctd\u003e$552.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854478551:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cp\u003eBackflow prevention on fuel and oil transfer lines, hydrocarbon processing, hot-water and steam-condensate service to 125 psi steam, compressed air with oil carryover, and heated industrial loops beyond the 210°F limit of Buna-N. The 1\/2 psi cracking pressure also suits low-head gravity and recirculation systems. Not for potable water supply (not lead-free).\u003c\/p\u003e\u003ch2\u003eCross-References \u0026amp; Interchange\u003c\/h2\u003e\u003cp\u003eReplacing another brand's 3\/8 in. brass inline check valve with FKM\/Viton trim? Match nominal size, end connections, cracking pressure, and pressure rating for a direct fit — or send us your part number and we will confirm the interchange. Water, air, or general-purpose service? The \u003ca style=\"color:#FE8C03\" href=\"\/products\/3-8-in-brass-inline-check-valve-buna-n-944402\"\u003e3\/8 in. Buna-N version (944402)\u003c\/a\u003e costs less and covers everything up to 210°F. Corrosive chemicals? Step up to the \u003ca style=\"color:#FE8C03\" href=\"\/products\/3-8-in-316-stainless-steel-inline-check-valve-949402\"\u003e3\/8 in. 316 SS inline check valve (949402)\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eAvailability\u003c\/h2\u003e\u003cp\u003eIn stock — ships direct from the manufacturer, typically 1–3 business days.\u003c\/p\u003e\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types Explained (Swing vs. Spring vs. Wafer)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/valve-pressure-temperature-ratings-chart\"\u003eValve Pressure \u0026amp; Temperature Ratings Chart\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262418135,"sku":"944402V","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944402V_178e6e1f-8466-4dfe-a26c-64494c7f804b.jpg?v=1778884480","url":"https:\/\/apexflowsolutions.com\/products\/38-brass-in-line-valve-viton-944402v","provider":"Apex Flow Solutions","version":"1.0","type":"link"}