{"product_id":"valvula-mariposa-wafer-ss316-disco-recubierto-ptfe","title":"Wafer Butterfly Valve SS316 | PTFE Coated SS316 Disc | Greater Chemical Resistance","description":"\u003ch2\u003eSS316 Wafer Butterfly Valve — PTFE Coated Disc and PTFE Seat for Maximum Chemical Protection\u003c\/h2\u003e\n\n\u003cp\u003e\n  This SS316 wafer butterfly valve takes chemical protection a step further than the standard SS316 disc version: the disc features a \u003cstrong\u003ePTFE coating over its entire surface\u003c\/strong\u003e, completely eliminating contact between the disc's metal and the process fluid. In the open position, the disc is the only component remaining within the flow — with PTFE coating, no metallic part is exposed to the fluid, regardless of the level of chemical aggressiveness.\n\u003c\/p\u003e\n\u003cp\u003e\n  The combination of an SS316 body, PTFE-coated SS316 disc, and PTFE seat makes this valve the right choice when the fluid is aggressive enough to attack the SS316 of the disc in continuous service, but does not require the level of protection of an anti-corrosion valve with a full PFA liner.\n\u003c\/p\u003e\n\n\u003ch3\u003eConstruction Materials\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBody:\u003c\/strong\u003e CF8M Stainless Steel (cast equivalent of SS316)\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eDisc:\u003c\/strong\u003e SS316 Stainless Steel with full-surface PTFE coating — \u003cstrong\u003eno metal-fluid contact in any open position\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eSeat:\u003c\/strong\u003e PTFE — seals circumferentially with the coated disc upon closing\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eShaft \/ Stem:\u003c\/strong\u003e SS316 Stainless Steel with PTFE seals\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\u003eMounting Type:\u003c\/strong\u003e Wafer — between DIN PN10\/16 or ANSI 150 flanges\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eNominal Pressure:\u003c\/strong\u003e PN10 \/ PN16\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -20 °C to +150 °C\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eAvailable Diameters:\u003c\/strong\u003e DN50 (2\") to DN600 (24\")\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eDesign Standard:\u003c\/strong\u003e EN 593\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eActuator Interface:\u003c\/strong\u003e ISO 5211\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen to Specify a PTFE Coated Disc Instead of a Standard SS316 Disc?\u003c\/h3\u003e\n\u003cp\u003e\n  The uncoated SS316 disc resists corrosion from most aqueous fluids. The PTFE coated disc is the right choice when:\n\u003c\/p\u003e\n\u003cul\u003e\n\n  \u003cli\u003eThe fluid contains chloride concentrations that would cause pitting in the SS316 disc over time (seawater at elevated temperatures, concentrated brines)\u003c\/li\u003e\n\n  \u003cli\u003eThe fluid is a moderately-high concentration acid where SS316 would show generalized corrosion with prolonged contact\u003c\/li\u003e\n\n  \u003cli\u003eZero metallic contamination of the fluid is required — the PTFE coating ensures that no metallic ions from the disc contaminate the process\u003c\/li\u003e\n\n  \u003cli\u003eThe fluid is a moderate oxidant that would attack the SS316 disc in continuous open and close cycles\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eComparison of the Three SS316 Butterfly Valve Variants\u003c\/h3\u003e\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eVariant\u003c\/th\u003e\n\n      \u003cth\u003eDisc\u003c\/th\u003e\n\n      \u003cth\u003eSeat\u003c\/th\u003e\n\n      \u003cth\u003eBest for\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eSS316 + EPDM\u003c\/td\u003e\n\n      \u003ctd\u003eUncoated SS316\u003c\/td\u003e\n\n      \u003ctd\u003eEPDM\u003c\/td\u003e\n\n      \u003ctd\u003eWater, HVAC, general services\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eSS316 + Standard PTFE Disc\u003c\/td\u003e\n\n      \u003ctd\u003eUncoated SS316\u003c\/td\u003e\n\n      \u003ctd\u003ePTFE\u003c\/td\u003e\n\n      \u003ctd\u003eDiluted acids and alkalis, higher temperature\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eSS316 + Coated PTFE Disc ← This Product\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003ePTFE Coated SS316\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003ePTFE\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eFluids that attack SS316 disc — high chlorides, moderate acids, zero metallic contamination\u003c\/strong\u003e\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatible Fluids\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e✅ Sulfuric acid H₂SO₄ up to 40%\u003c\/li\u003e\n\n  \u003cli\u003e✅ Hydrochloric acid HCl up to 30%\u003c\/li\u003e\n\n  \u003cli\u003e✅ Nitric acid HNO₃ up to 30%\u003c\/li\u003e\n\n  \u003cli\u003e✅ Seawater and concentrated brines\u003c\/li\u003e\n\n  \u003cli\u003e✅ Sodium hypochlorite NaClO up to 15%\u003c\/li\u003e\n\n  \u003cli\u003e✅ Ferric chloride FeCl₃ — any concentration\u003c\/li\u003e\n\n  \u003cli\u003e✅ NaOH up to 40%\u003c\/li\u003e\n\n  \u003cli\u003e✅ Purified and demineralized water without metallic contamination\u003c\/li\u003e\n\n  \u003cli\u003e✅ Water treatment solutions with moderate oxidizers\u003c\/li\u003e\n\n  \u003cli\u003e⚠️ For HF, H₂SO₄ \u0026gt;70%, concentrated ClO₂: use \u003ca href=\"\/collections\/valvulas-de-bola-anticorrosivas-interiores-de-pfa\"\u003ePFA anti-corrosion valve →\u003c\/a\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Operation Versions\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eManual with lever:\u003c\/strong\u003e DN50 to DN200\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eManual with gear reducer:\u003c\/strong\u003e DN200 to DN600\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eWith pneumatic actuator:\u003c\/strong\u003e Single acting NC or NO, double acting. ISO 5211 + NAMUR.\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eWith electric actuator:\u003c\/strong\u003e 24 VDC, 110 VAC, 220 VAC. ON\/OFF or modulating 4–20 mA.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\n  For the complete range of SS316 butterfly valves, see \u003ca href=\"\/collections\/valvulas-mariposa-acero-inoxidable\"\u003estainless steel butterfly valves category →\u003c\/a\u003e\n\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Ficha Técnica de Válvula Mariposa Wafer en SS316 Disco y Asiento en Teflón Cematic\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-mariposa-wafer-ss316-asiento-disco-ptfe-pmss11.pdf?v=1765218770\" target=\"_blank\"\u003e\u003cspan style=\"color: #ab2727;\"\u003e\u003cstrong\u003eData Sheet (Spanish)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ab2727;\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/wafer-butterfly-vave-ss316-body-ptfe-seat-disc-pmss11.pdf?v=1778782440\" title=\"Wafer Buttefly Valve PTFE Disc and Seat - Data Sheet Cematic\" rel=\"noopener\" target=\"_blank\"\u003eData Sheet (English)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Cematic","offers":[{"title":"2\"","offer_id":51205118427449,"sku":"PMSS1110","price":459.0,"currency_code":"USD","in_stock":true},{"title":"3\"","offer_id":51205118460217,"sku":"PMSS1114","price":647.0,"currency_code":"USD","in_stock":true},{"title":"4\"","offer_id":51205118492985,"sku":"PMSS1118","price":970.0,"currency_code":"USD","in_stock":true},{"title":"6\"","offer_id":51205118525753,"sku":"PMSS1122","price":1523.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-mariposa-wafer-acero-inoxidable-316-asiento-disco-ptfe.jpg?v=1759853296","url":"https:\/\/cematic.com\/products\/valvula-mariposa-wafer-ss316-disco-recubierto-ptfe","provider":"Cematic","version":"1.0","type":"link"}