{"product_id":"valvula-bola-ss316-asiento-metalico-ni55-ansi-150","title":"Metal Seated Ball Valve SS316 + Ni55 | ANSI 150 | Slurry and High Temperature up to 350 °C","description":"\u003ch2\u003eBall Valve with SS316 + Ni55 Metal Seat — ANSI 150 Flange for High Temperature, Slurry, and Fluids with Suspended Solids\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eball valve with SS316 + Ni55 metal seat\u003c\/strong\u003e is the solution for services where conventional PTFE seats cannot operate: high temperature above 200 °C, fluids with abrasive suspended solids that would wear out PTFE in weeks, industrial slurries with particles that would lodge between the seat and the ball preventing tight shut-off, and process fluids that can carbonize or solidify in the elastomeric seat, blocking the valve in the open or closed position. The metal-to-metal seal between the Ni55-coated SS316 ball and the SS316 + Ni55 seat withstands all these conditions that PTFE cannot handle — with operating temperatures up to \u003cstrong\u003e350 °C\u003c\/strong\u003e and abrasive wear resistance far superior to fluoropolymer.\u003c\/p\u003e\n\u003ch3\u003eWhy metal seat and not PTFE — the four services where PTFE is not viable\u003c\/h3\u003e\n\u003ch4\u003e1. High temperature above 200 °C\u003c\/h4\u003e\n\u003cp\u003ePTFE maintains its sealing properties up to approximately 180–200 °C in continuous service. Above that range, PTFE begins to creep under the seat load — it progressively loses its shape and its contact force with the ball, resulting in leaks in the closed position that worsen over time. The SS316 + Ni55 metal seat operates without degradation from -20 °C to 350 °C — covering high-pressure steam services, high-temperature thermal oils, combustion gases, and process fluids at temperatures that PTFE cannot handle.\u003c\/p\u003e\n\u003ch4\u003e2. Fluids with abrasive suspended solids\u003c\/h4\u003e\n\u003cp\u003eIn fluids with solid particles — sands, mineral fines, catalysts, process slurries, ore pulps — the particles act as an abrasive on the PTFE seat surface with each opening and closing cycle. PTFE, being a relatively soft material (Shore D hardness ~55), wears out quickly in this service. The Ni55 coating (nickel with an approximate Rockwell C hardness of 55 — equivalent to ~55 HRC) has a much higher surface hardness than PTFE and resists particle abrasion for thousands of cycles without significant material loss.\u003c\/p\u003e\n\u003ch4\u003e3. Slurries and fluids with high solids content\u003c\/h4\u003e\n\u003cp\u003eIn industrial slurries (dredging slurries, wastewater treatment slurries, ore pulps, drilling slurries), suspended solids lodge between the seat and the ball when the valve closes — creating a layer of solid material that prevents direct contact between the sealing surfaces. PTFE, being compressible, can temporarily mask these particles, but over time it permanently deforms around the incrustations and loses its seal. The metal-to-metal seal has less tendency to trap particles, and the higher hardness of the surfaces allows particles to be expelled or crushed upon closing without damaging the seat.\u003c\/p\u003e\n\u003ch4\u003e4. Fluids that would carbonize or solidify the PTFE seat\u003c\/h4\u003e\n\u003cp\u003eSome process fluids — asphalt, pitch, high-melting-point paraffins, molten polymers, thermoplastic resins — can solidify or carbonize in the PTFE seat when the valve remains closed for extended periods. The solidified material adheres to the PTFE and can block the valve's opening or tear off fragments of the seat when forcing the opening. The metal seat does not have this problem — the surface hardness of Ni55 does not allow the adhesion of solid deposits in the same way as porous PTFE on a microscopic scale.\u003c\/p\u003e\n\u003ch3\u003eThe Ni55 coating — why this material for the seat\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNi55\u003c\/strong\u003e is a hard nickel coating applied by electrochemical or thermal process on the SS316 substrate. Its main properties for valve applications:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSurface hardness:\u003c\/strong\u003e Approximately 55 HRC (Rockwell C) — comparable to hardened tool steel. Much higher than base SS316 (~22 HRC) and PTFE (~Shore D 55, equivalent to ~5 HRC). This hardness provides abrasive wear resistance.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCorrosion resistance:\u003c\/strong\u003e Nickel has excellent corrosion resistance in the most common industrial fluids — better than SS316 in some acids and alkalis. The SS316 substrate additionally provides the base resistance of stainless steel.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e Ni55 can be polished to Ra ≤ 0.4 µm — the mirror finish necessary for a tight metal-to-metal seal. The quality of the surface finish of the seat and ball directly determines the tightness of the metal seal.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e Ni55 maintains its hardness and adhesion properties up to 350 °C — sufficient for high-pressure steam services, thermal oils, and high-temperature process gases.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCoating thickness:\u003c\/strong\u003e The thickness of the Ni55 over the SS316 substrate is sufficient so that normal abrasive wear in service does not expose the base SS316 during the valve's design service life.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eMetal-to-metal seal vs. PTFE seal — comparative tightness\u003c\/h3\u003e\n\u003cp\u003eAn important difference that the specifier should be aware of: the metal-to-metal seal \u003cstrong\u003edoes not provide the same hermetic tightness as the PTFE seal under low differential pressure conditions.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePTFE Seal:\u003c\/strong\u003e PTFE is compressible and conforms to the micro-irregularities of the ball — the PTFE-metal seal is tight even with very low differential pressures because the polymer flows to fill any microscopic surface imperfections.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMetal-to-metal seal:\u003c\/strong\u003e The contact between two hardened metal surfaces depends on the precision of machining and the surface finish of both parts. With an Ra ≤ 0.4 µm finish and very precise tolerance adjustment, the metal-to-metal seal is very good — but it generally allows for detectable micro-leakage in low-pressure tests that PTFE would not. In industrial practice, the metal-to-metal seal in well-made ball valves provides sufficient tightness for all services where it is specified (steam, slurries, high temperature) — but it should not be specified if total hermetic tightness is required in gas tests at low differential pressure.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eConstruction Materials\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBody:\u003c\/strong\u003e Two pieces in CF8M stainless steel (ASTM A351) — cast equivalent of SS316\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBall:\u003c\/strong\u003e Solid SS316 with Ni55 coating on the entire sealing surface — floating ball\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSeat:\u003c\/strong\u003e SS316 with Ni55 coating — metal-to-metal seal with the coated ball\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eStem:\u003c\/strong\u003e SS316 stainless steel with expanded graphite packing — graphite is the standard packing material for high-temperature services where PTFE is not sufficient\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eConnection:\u003c\/strong\u003e ANSI 150 raised face (RF) flanges, ASME B16.5 drilling\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eActuator mount:\u003c\/strong\u003e Integrated ISO 5211\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eType:\u003c\/strong\u003e Quarter-turn floating ball\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBody design:\u003c\/strong\u003e Two-piece body\u003c\/li\u003e\n\n\u003cstrong\u003eBody material:\u003c\/strong\u003e CF8M (ASTM A351) — cast SS316 equivalent\n\u003cli\u003e\n\n\u003cstrong\u003eBall:\u003c\/strong\u003e SS316 + Ni55 coating\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSeat:\u003c\/strong\u003e SS316 + Ni55 coating — metal-to-metal seal\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eStem:\u003c\/strong\u003e SS316 with expanded graphite packing\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eConnection:\u003c\/strong\u003e ANSI 150 RF flanges — face-to-face ASME B16.10\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFlange drilling:\u003c\/strong\u003e ASME B16.5\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAvailable diameters:\u003c\/strong\u003e 1½\" (DN40), 2\" (DN50), 2½\" (DN65), 3\" (DN80)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eNominal pressure:\u003c\/strong\u003e ANSI 150 — up to 290 psi (20 bar) at 38 °C\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e -20 °C to +350 °C — far exceeding PTFE's limit\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSeal type:\u003c\/strong\u003e Metal-to-metal (hard seat)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eActuator mount:\u003c\/strong\u003e ISO 5211\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eRecommended flange gasket:\u003c\/strong\u003e SS316 + graphite spiral wound for high temperature\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eComparison — ball with PTFE seat vs. ball with Ni55 metal seat\u003c\/h3\u003e\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriterion\u003c\/th\u003e\n\n\u003cth\u003eStandard PTFE Seat\u003c\/th\u003e\n\n\u003cth\u003eNi55 Metal Seat ← This Product\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaximum Temperature\u003c\/td\u003e\n\n\u003ctd\u003e180–200 °C\u003c\/td\u003e\n\n\u003ctd\u003e✅ 350 °C\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAbrasive Wear Resistance\u003c\/td\u003e\n\n\u003ctd\u003eLow — soft PTFE (~5 HRC)\u003c\/td\u003e\n\n\u003ctd\u003e✅ High — Ni55 (~55 HRC)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFluids with Suspended Solids\u003c\/td\u003e\n\n\u003ctd\u003e❌ Accelerated wear\u003c\/td\u003e\n\n\u003ctd\u003e✅ First choice\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIndustrial Slurries\u003c\/td\u003e\n\n\u003ctd\u003e❌ Not recommended\u003c\/td\u003e\n\n\u003ctd\u003e✅ Designed for this service\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFluids that solidify in the seat\u003c\/td\u003e\n\n\u003ctd\u003e❌ Risk of blockage\u003c\/td\u003e\n\n\u003ctd\u003e✅ Higher adhesion resistance\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTightness at low differential pressure\u003c\/td\u003e\n\n\u003ctd\u003e✅ Hermetic — PTFE conforms to micro-irregularities\u003c\/td\u003e\n\n\u003ctd\u003eVery good — depends on surface finish\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eClean fluids at ambient temperature\u003c\/td\u003e\n\n\u003ctd\u003e✅ First choice — lower cost\u003c\/td\u003e\n\n\u003ctd\u003ePossible — unnecessary higher cost\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHigh-temperature steam\u003c\/td\u003e\n\n\u003ctd\u003e❌ Not viable above 200 °C\u003c\/td\u003e\n\n\u003ctd\u003e✅ First choice up to 350 °C\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRelative Cost\u003c\/td\u003e\n\n\u003ctd\u003e✅ Lower\u003c\/td\u003e\n\n\u003ctd\u003eHigher — justified by service conditions\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\u003ch3\u003eAutomation — high-temperature considerations\u003c\/h3\u003e\n\u003cp\u003eIn high-temperature services (above 200 °C), actuator selection and mounting require additional considerations compared to standard services:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eStem extension (yoke extension):\u003c\/strong\u003e When the fluid temperature exceeds 80–100 °C, the temperature at the top of the stem — where the actuator is mounted — can be high enough to damage the actuator's seals and electronics. A stem extension distances the actuator from the hot body and allows sufficient thermal dissipation to protect the actuator.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePneumatic actuator for high temperature:\u003c\/strong\u003e An aluminum or stainless steel pneumatic actuator with the correct stem extension is the most common configuration for automating high-temperature valves — it has no electronic components in the actuator body that could be damaged by temperature.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eElectric actuator for high temperature:\u003c\/strong\u003e Conventional electric actuators have a maximum ambient temperature of 60–80 °C. For services where the valve body temperature exceeds 150 °C, specify a high-temperature electric actuator or a pneumatic actuator with an extension.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003ca href=\"\/collections\/valvulas-bola-con-actuador-neumatico\"\u003eSee ball valve assemblies with pneumatic actuator →\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"\/collections\/valvulas-bola-con-actuador-electrico\"\u003eSee ball valve assemblies with electric actuator →\u003c\/a\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eMain industries and applications\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWastewater treatment — primary and secondary sludge:\u003c\/strong\u003e Isolation and control of sludge in municipal and industrial wastewater treatment plants. Primary sludge (density ~1.02–1.05 g\/cm³, solids 2–8%) and secondary sludge (solids 0.5–2%) contain particles that would rapidly degrade PTFE — the valve with a Ni55 metal seat is the standard specification for this service.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMining — ore pulps and process slurries:\u003c\/strong\u003e Isolation in ore pulp lines in flotation, leaching, and concentration plants. Mineral pulps (20–50% by weight solids, abrasive particles of quartz, pyrites, and other hard minerals) are the most abrasive service for valves — the Ni55 of the seat and ball provides the necessary wear resistance for an acceptable service life.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHigh-temperature steam (150–350 °C):\u003c\/strong\u003e Isolation of high-pressure steam lines in industrial process plants, cogeneration, and thermal power plants where the temperature exceeds the PTFE limit. The valve with a Ni55 seat and graphite packing covers the full range of process steam up to 350 °C.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eRefining — heavy oils and asphalt:\u003c\/strong\u003e Control of high-viscosity, high-temperature fluids in vacuum distillation units, coking, and asphalt production. Heavy oil and asphalt at temperatures of 200–350 °C would solidify in the PTFE seat upon cooling — the metal seat does not have this problem.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePaper industry — pulp and process slurries:\u003c\/strong\u003e Isolation in cellulose pulp lines (2–12% solids), kaolin slurries, and lime slurries in kraft paper plants. Cellulose pulp has fibers that lodge between the PTFE seat and the ball — the metal seat provides greater resistance to fiber trapping.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHigh-temperature thermal oils:\u003c\/strong\u003e Industrial heating systems with thermal oil (Therminol, Dowtherm, Mobiltherm) at temperatures of 200–350 °C in presses, calenders, reactors, and temperature-controlled process systems. Thermal oil at these temperatures exceeds the PTFE limit — the Ni55 seat with graphite packing is the correct specification.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCombustion gases and high-temperature fluids:\u003c\/strong\u003e Isolation in high-temperature process gas lines, air preheaters, and heat recovery units where the fluid temperature consistently exceeds 200 °C.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eFor the complete range of flanged SS316 ball valves, see the \u003ca href=\"\/collections\/valvulas-bola-brida-ansi\"\u003eANSI flanged ball valves category →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e\n\u003cp data-end=\"1787\" data-start=\"1711\"\u003e\u003ca rel=\"noopener\" title=\"High Temperature Ball Valve Metal Seat Data Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-de-bola-2pc-ansi-150-sello-duro-pbfhs1.pdf?v=1764112833\" target=\"_blank\"\u003e\u003cspan style=\"color: #ab2929;\"\u003e\u003cstrong\u003eData Sheet\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Cematic","offers":[{"title":"1 1\/2\"","offer_id":51221398618425,"sku":"PBFHS108","price":643.0,"currency_code":"USD","in_stock":true},{"title":"2\"","offer_id":51221398651193,"sku":"PBFHS110","price":781.0,"currency_code":"USD","in_stock":true},{"title":"2 1\/2\"","offer_id":51221398683961,"sku":"PBFHS112","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"3\"","offer_id":51221398716729,"sku":"PBFHS114","price":1440.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/v_lvula_de_bola_asiento_met_lico_SS316_sello_duro_ANSI_150.jpg?v=1773961981","url":"https:\/\/cematic.com\/products\/valvula-bola-ss316-asiento-metalico-ni55-ansi-150","provider":"Cematic","version":"1.0","type":"link"}