{"product_id":"valvula-bola-wcb-rosca-npt-internos-ss316v","title":"WCB Ball Valve NPT Thread | SS304 Ball | PTFE Seat | ISO 5211 | ½\" to 4\"","description":"\u003ch2\u003eWCB Body Ball Valve — NPT Thread, Three-Piece, 316 Stainless Steel Internals\u003c\/h2\u003e\n\n\u003cp\u003e\n  The \u003cstrong\u003eWCB ball valve with NPT thread and 316 stainless steel internals\u003c\/strong\u003e combines the best of two materials in a single component: the WCB carbon steel body provides the mechanical strength and economy of carbon steel for the most demanding pressure conditions, while the SS316 ball and stem ensure corrosion resistance on surfaces directly exposed to the fluid. The result is a valve with greater durability than versions with SS304 internals, at a significantly lower cost than an all-SS316 valve.\n\u003c\/p\u003e\n\u003cp\u003e\n  The three-piece design allows for complete disassembly of the internals in the field — without removing the valve from the pipeline — for inspection, cleaning, or seat replacement. The integrated ISO 5211 mounting pad guarantees compatibility with any quarter-turn pneumatic or electric actuator on the market.\n\u003c\/p\u003e\n\n\u003ch3\u003eWCB with SS316 Internals — The Right Combination of Materials\u003c\/h3\u003e\n\u003cp\u003e\n  Selecting the correct material for each part of the valve is key to efficient technical specification:\n\u003c\/p\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eWCB Body — Mechanical Strength at the Lowest Cost:\u003c\/strong\u003e The valve body does not have direct contact with the fluid during normal operation — it is protected by the PTFE seat and the ball's geometry. WCB provides the necessary mechanical strength for high pressures at a significantly lower cost than SS316. For the fluids handled by this valve (gas, steam, oil, process water), WCB is the correct body material.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eSS316 Ball and Stem — Corrosion Resistance Where It Matters:\u003c\/strong\u003e The ball is the only metallic component in direct contact with the fluid in the open position. SS316, with its molybdenum content, resists corrosion from chlorides, mildly aggressive fluids, and gases with moisture that would attack SS304 or carbon steel in the long term. The SS316 stem resists corrosion from fluid exposure in the packing area.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eSS316 vs. SS304 in Internals:\u003c\/strong\u003e Unlike Cematic flanged WCB valves that have an SS304 ball, this threaded valve has an SS316 ball and stem — greater corrosion resistance to chlorides on surfaces exposed to the fluid. It is the correct specification when the fluid may contain traces of chlorides, moisture with H₂S, or slightly aggressive condensates.\n  \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eThree-Piece Design — Field Maintenance\u003c\/h3\u003e\n\u003cp\u003e\n  The central body houses the ball and seats; the two NPT threaded end caps are screwed on both sides. By unscrewing the caps, the central body becomes fully accessible without removing the valve from the pipeline:\n\u003c\/p\u003e\n\u003cul\u003e\n\n  \u003cli\u003eReplacement of PTFE seats without disassembling the valve from the line\u003c\/li\u003e\n\n  \u003cli\u003eVisual inspection of the ball to detect scratches or scaling before they cause leaks\u003c\/li\u003e\n\n  \u003cli\u003eCleaning of deposits in fluids with solids or paraffins that crystallize on the seat\u003c\/li\u003e\n\n  \u003cli\u003eThe caps remain threaded to the piping during maintenance — without compromising system integrity\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterials of Construction\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBody:\u003c\/strong\u003e Three pieces in WCB carbon steel (ASTM A216 Gr. WCB) — high mechanical strength for gas, steam, oil, and high-pressure process fluids\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBall:\u003c\/strong\u003e SS316 stainless steel with mirror-polished finish — greater corrosion resistance than SS304 in fluids with chlorides or moisture with H₂S\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eStem:\u003c\/strong\u003e SS316 stainless steel with PTFE packing and anti-blowout design\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eSeats:\u003c\/strong\u003e Virgin PTFE — tight shut-off without leaks in both directions. Compatible with virtually all fluids that WCB handles.\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT conical thread (ANSI B1.20.1)\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eLever:\u003c\/strong\u003e Coated carbon steel or stainless steel depending on model\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eActuator Mounting Pad:\u003c\/strong\u003e Integrated ISO 5211\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eType:\u003c\/strong\u003e Floating ball, quarter-turn\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBody Design:\u003c\/strong\u003e Three-piece body\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e WCB (ASTM A216 Gr. WCB)\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBall:\u003c\/strong\u003e Polished SS316\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eStem:\u003c\/strong\u003e SS316 with anti-blowout design\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eSeats:\u003c\/strong\u003e Virgin PTFE\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eStem Packing:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT conical thread (ANSI B1.20.1)\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eAvailable Diameters:\u003c\/strong\u003e ½\" (DN15), ¾\" (DN20), 1\" (DN25), 1¼\" (DN32), 1½\" (DN40), 2\" (DN50), 2½\" (DN65), 3\" (DN80), 4\" (DN100)\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eNominal Pressure:\u003c\/strong\u003e Up to PN64 (64 bar) at ambient temperature\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -20 °C to +180 °C with PTFE seat\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003ePort:\u003c\/strong\u003e Full Port\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eActuator Mounting Pad:\u003c\/strong\u003e ISO 5211\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eComparison — WCB Threaded Ball Valve vs. Full SS316\u003c\/h3\u003e\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eCriterion\u003c\/th\u003e\n\n      \u003cth\u003eWCB Ball + SS316 Internals ← This\u003c\/th\u003e\n\n      \u003cth\u003eFull SS316 Ball Valve\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eBody Mechanical Strength\u003c\/td\u003e\n\n      \u003ctd\u003e✅ High — WCB greater resistance than CF8M at elevated temperatures\u003c\/td\u003e\n\n      \u003ctd\u003eHigh — CF8M comparable at ambient temperature\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eBody Corrosion Resistance\u003c\/td\u003e\n\n      \u003ctd\u003eOnly non-corrosive fluids for WCB body\u003c\/td\u003e\n\n      \u003ctd\u003e✅ High — SS316 resists chlorides and dilute acids\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eInternals Corrosion Resistance\u003c\/td\u003e\n\n      \u003ctd\u003e✅ SS316 — greater than SS304\u003c\/td\u003e\n\n      \u003ctd\u003e✅ SS316\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eRelative Cost\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Lower — WCB more economical than SS316 in large diameters\u003c\/td\u003e\n\n      \u003ctd\u003eHigher\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eMain Service\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Gas, steam, oil, process water without high chlorides\u003c\/td\u003e\n\n      \u003ctd\u003eSeawater, moderate chemical, corrosive fluids\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eCompatibility with WCB Piping Class\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Yes — standard material in Oil \u0026amp; Gas piping classes\u003c\/td\u003e\n\n      \u003ctd\u003eRequires specific SS316 piping class\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3\u003eFluid Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e✅ Natural gas, LPG, and dry industrial gases\u003c\/li\u003e\n\n  \u003cli\u003e✅ Crude oil, process oils, and hydrocarbon condensates\u003c\/li\u003e\n\n  \u003cli\u003e✅ Low and medium pressure steam up to 150 °C with PTFE\u003c\/li\u003e\n\n  \u003cli\u003e✅ Process water without high chlorides\u003c\/li\u003e\n\n  \u003cli\u003e✅ Compressed air and industrial gases\u003c\/li\u003e\n\n  \u003cli\u003e✅ Mineral and hydraulic oils\u003c\/li\u003e\n\n  \u003cli\u003e✅ Natural gas with traces of H₂S and moisture — SS316 internals resist better than SS304\u003c\/li\u003e\n\n  \u003cli\u003e⚠️ Water with chlorides \u0026gt;200 ppm: WCB body may corrode externally — use full SS316\u003c\/li\u003e\n\n  \u003cli\u003e⚠️ Concentrated acidic or alkaline fluids: WCB body is not resistant — use SS316 or PFA\u003c\/li\u003e\n\n  \u003cli\u003e❌ Seawater, HF, concentrated acids: use \u003ca href=\"\/en\/collections\/valvula-de-bola-acero-inoxidable\"\u003eSS316 ball valve →\u003c\/a\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eAutomation — ISO 5211\u003c\/h3\u003e\n\u003cp\u003e\n  The ISO 5211 mounting pad allows direct mounting of pneumatic or electric quarter-turn actuators. For gas and oil services where fail-safe closure of the control system is a safety requirement, specify a normally closed (NC) single-acting pneumatic actuator.\n\u003c\/p\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eNC or Double-Acting Pneumatic Actuator:\u003c\/strong\u003e First choice with available air supply. \u003ca href=\"\/en\/collections\/valvulas-bola-con-actuador-neumatico\"\u003eSee ball valve sets with pneumatic actuator →\u003c\/a\u003e\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eElectric Actuator:\u003c\/strong\u003e For installations without an air supply or with integrated Modbus. \u003ca href=\"\/en\/collections\/valvulas-bola-con-actuador-electrico\"\u003eSee ball valve sets with electric actuator →\u003c\/a\u003e\n  \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eMain Applications\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eOil and Gas:\u003c\/strong\u003e Isolation of crude oil, natural gas, and condensate lines in production facilities, manifolds, and collection stations. The WCB + SS316 combination is the standard specification in Oil \u0026amp; Gas piping classes for threaded valves in hydrocarbon services — WCB handles the pressure, and SS316 internals resist traces of H₂S and moisture in natural gas.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eLPG and Natural Gas — Industrial Distribution:\u003c\/strong\u003e Service points, equipment isolation, and safety valves in LPG and natural gas distribution networks in industrial facilities, hospitals, hotels, and buildings. NPT thread integrates directly into existing installations.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eSteam and Condensate:\u003c\/strong\u003e Isolation of steam traps, equipment bypasses, and service points in steam distribution systems. WCB supports standard steam pressures, and SS316 internals resist the slightly acidic condensate formed by dissolved CO₂.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eChemical Industry — Fluids Non-Corrosive to the Body:\u003c\/strong\u003e Isolation of service points in process lines where the fluid is not aggressive to the WCB body but may have traces of corrosive agents that justify SS316 in the internals instead of SS304.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eManufacturing and General Industry:\u003c\/strong\u003e Control of plant services — steam, water, thermal oil, and compressed air — in industrial installations where WCB is the standard material and the robustness of carbon steel is valued over the relative fragility of SS316 to mechanical impact.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eWater Treatment Plants:\u003c\/strong\u003e Service points in process water distribution, instrumentation isolation, and bypass valves in plants where the fluid is process water without high chlorides and WCB is sufficient for the body.\n  \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\n  For the complete range of WCB ball valves, see \u003ca href=\"\/en\/collections\/valvulas-bola-acero-carbono\"\u003ecarbon steel ball valves category →\u003c\/a\u003e\n\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-bola-rosca-npt-acero-carbono-wcb-ptfe-pb02.pdf?v=1776281824\" title=\"Ficha técnica válvula de bola cuerpo WCB - asiento PTFE - conexiones roscadas NPT - Cematic\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #b12020;\"\u003e\u003cstrong\u003eData Sheet\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Cematic","offers":[{"title":"1\/2\"","offer_id":52049526882617,"sku":"PB0204","price":476.89,"currency_code":"MXN","in_stock":true},{"title":"3\/4\"","offer_id":52049526915385,"sku":"PB0205","price":580.18,"currency_code":"MXN","in_stock":true},{"title":"1\"","offer_id":52049526948153,"sku":"PB0206","price":778.66,"currency_code":"MXN","in_stock":true},{"title":"1 1\/4\"","offer_id":52049526980921,"sku":"PB0207","price":1032.82,"currency_code":"MXN","in_stock":true},{"title":"1 1\/2\"","offer_id":52049527013689,"sku":"PB0208","price":1429.79,"currency_code":"MXN","in_stock":true},{"title":"2\"","offer_id":52049527046457,"sku":"PB0210","price":1875.29,"currency_code":"MXN","in_stock":true},{"title":"2 1\/2\"","offer_id":52049527079225,"sku":"PB0212","price":3734.33,"currency_code":"MXN","in_stock":true},{"title":"3\"","offer_id":52049527111993,"sku":"PB0214","price":4926.12,"currency_code":"MXN","in_stock":true},{"title":"4\"","offer_id":52049527144761,"sku":"PB0218","price":8580.51,"currency_code":"MXN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-bola-wcb-internos-ss316-rosca-npt-iso5211_5e86de0f-52c4-4c32-b376-66c4ae9f617c.jpg?v=1776278619","url":"https:\/\/cematic.com.mx\/en\/products\/valvula-bola-wcb-rosca-npt-internos-ss316v","provider":"Cematic","version":"1.0","type":"link"}