{"product_id":"valvula-mariposa-doble-brida-ansi-150-hierro-ductil-epdm","title":"Double Flanged Butterfly Valve ANSI 150 | Ductile Iron | SS304 Disc | EPDM Seat","description":"\u003ch2\u003eANSI 150 Double Flanged Butterfly Valve — Ductile Iron Body, SS304 Disc, EPDM Seat, API 609\u003c\/h2\u003e\n\n\u003cp\u003e\n  The \u003cstrong\u003edouble flanged butterfly valve\u003c\/strong\u003e is the most robust design with the longest face-to-face dimension in the iron butterfly family — its \u003cstrong\u003eintegrally cast flanges on the body\u003c\/strong\u003e make it radically different from the wafer butterfly (flangeless, between pipe flanges) and the Lug butterfly (threaded bolt holes). By having its own flanges, the valve bolts directly to the pipe flanges with independent bolts on each side — just like any other flanged component (gate, globe, check valves) — without relying on through-bolts that pass through both flanges. This construction makes it the standard option for \u003cstrong\u003elarge diameters\u003c\/strong\u003e where the butterfly's face-to-face length is sufficient so that the pipe flanges do not need to be perfectly aligned, and where the valve's weight in large diameters requires the structural rigidity of integral flanges. Body in \u003cstrong\u003eductile iron\u003c\/strong\u003e, disc in \u003cstrong\u003eSS304 (CF8)\u003c\/strong\u003e, stem in \u003cstrong\u003eSS420\u003c\/strong\u003e, and replaceable \u003cstrong\u003eEPDM\u003c\/strong\u003e seat in accordance with \u003cstrong\u003eAPI 609\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003ch3\u003eDouble Flanged vs. Wafer vs. Lug — the three types of butterfly valves and when to use each\u003c\/h3\u003e\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eCriterion\u003c\/th\u003e\n\n      \u003cth\u003eDouble Flanged ← This product\u003c\/th\u003e\n\n      \u003cth\u003eLug Type\u003c\/th\u003e\n\n      \u003cth\u003eWafer Type\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003ePipe Connection\u003c\/td\u003e\n\n      \u003ctd\u003eIntegral flanges — independent bolts on each side\u003c\/td\u003e\n\n      \u003ctd\u003eThreaded bolt holes — bolts directly to each flange\u003c\/td\u003e\n\n      \u003ctd\u003eFlangeless — between pipe flanges with through-bolts\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eFace-to-face length\u003c\/td\u003e\n\n      \u003ctd\u003eLonger — integral flanges add length\u003c\/td\u003e\n\n      \u003ctd\u003eShort — same as wafer\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Minimal — the most compact design\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eDead-end service\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Yes — independent integral flanges\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Yes — threaded bolt holes\u003c\/td\u003e\n\n      \u003ctd\u003e❌ No — requires both flanges\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eApplication in large diameters\u003c\/td\u003e\n\n      \u003ctd\u003e✅ First choice — structural rigidity of integral flanges\u003c\/td\u003e\n\n      \u003ctd\u003ePossible up to certain diameters\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Possible — but more flexible in large diameters\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eAlignment with piping\u003c\/td\u003e\n\n      \u003ctd\u003e✅ More tolerant — integral flanges compensate for misalignment\u003c\/td\u003e\n\n      \u003ctd\u003eMedium\u003c\/td\u003e\n\n      \u003ctd\u003eRequires precise alignment of both flanges\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eWeight\u003c\/td\u003e\n\n      \u003ctd\u003eHeavier — integral flanges add material\u003c\/td\u003e\n\n      \u003ctd\u003eMedium\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Lighter — no integral flanges\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eRelative Cost\u003c\/td\u003e\n\n      \u003ctd\u003eHigher — more complex design\u003c\/td\u003e\n\n      \u003ctd\u003eMedium\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Lower\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eValve Replacement\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Like any flanged component — without depending on through-bolt length\u003c\/td\u003e\n\n      \u003ctd\u003e✅ Easy — remove bolts from the downstream side\u003c\/td\u003e\n\n      \u003ctd\u003eRequires removing all through-bolts\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eDesign Standard\u003c\/td\u003e\n\n      \u003ctd\u003e✅ API 609\u003c\/td\u003e\n\n      \u003ctd\u003eAPI 609 \/ ISO 5752\u003c\/td\u003e\n\n      \u003ctd\u003eISO 5752 \/ API 609\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3\u003eIntegral flanges — why they matter in large diameters\u003c\/h3\u003e\n\u003cp\u003e\n  In small diameters (2\" to 6\"), wafer and Lug butterfly valves are perfectly viable — through-bolts are short, pipe flanges are perfectly aligned, and valve weight is manageable. In large diameters (8\" and above), problems arise that the double flanged design solves:\n\u003c\/p\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eStructural rigidity:\u003c\/strong\u003e A 16\" or 20\" wafer butterfly has considerable weight — pipe flanges must support this weight laterally. The integral flanges of the double flanged valve better distribute the mechanical loads from the valve's weight and pipe forces over the body.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eTolerance to misalignment:\u003c\/strong\u003e In large diameters, perfect alignment of two pipe flanges separated by the valve's face-to-face length is harder to achieve in the field. The integral flanges of the double flanged valve are machined with greater precision than the assembly of two pipe flanges — reducing the risk of leaks at joints due to misalignment.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eEasier installation:\u003c\/strong\u003e The double flanged valve installs and removes exactly like a gate or globe valve — without the through-bolt coordination required for a wafer butterfly in large diameters.\n  \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eConstruction Materials\u003c\/h3\u003e\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eComponent\u003c\/th\u003e\n\n      \u003cth\u003eMaterial\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 (with integral flanges)\u003c\/td\u003e\n\n      \u003ctd\u003eDuctile iron — higher mechanical strength than gray iron\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eDisc\u003c\/td\u003e\n\n      \u003ctd\u003eSS304 (CF8) — stainless steel\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eStem\u003c\/td\u003e\n\n      \u003ctd\u003eSS420 — martensitic stainless steel\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eSeat\u003c\/td\u003e\n\n      \u003ctd\u003eEPDM — field replaceable\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eActuator Mounting\u003c\/td\u003e\n\n      \u003ctd\u003eISO 5211\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eType:\u003c\/strong\u003e Double flanged butterfly valve\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eDesign Standard:\u003c\/strong\u003e API 609\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eActuator Mounting:\u003c\/strong\u003e ISO 5211\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eFlange Drilling:\u003c\/strong\u003e ANSI 150\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Ductile iron\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eDisc:\u003c\/strong\u003e SS304 (CF8)\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eStem:\u003c\/strong\u003e SS420\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eSeat:\u003c\/strong\u003e EPDM — field replaceable\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eNominal Pressure:\u003c\/strong\u003e PN16 (230 psi \/ 16 bar) at ambient temperature\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eWorking Temperature:\u003c\/strong\u003e -20 °C to +110 °C\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eFluid Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\n  \u003cli\u003e✅ Potable water and municipal water in large diameters\u003c\/li\u003e\n\n  \u003cli\u003e✅ Clean industrial process water\u003c\/li\u003e\n\n  \u003cli\u003e✅ HVAC water — chilled water and hot water up to 110 °C\u003c\/li\u003e\n\n  \u003cli\u003e✅ Chlorinated water up to 5 ppm\u003c\/li\u003e\n\n  \u003cli\u003e✅ Non-corrosive wastewater with fine solids\u003c\/li\u003e\n\n  \u003cli\u003e✅ Compressed air and non-corrosive gases\u003c\/li\u003e\n\n  \u003cli\u003e⚠️ Water with high chlorides: SS304 disc may suffer pitting — consult version with SS316 disc\u003c\/li\u003e\n\n  \u003cli\u003e⚠️ Temperature above 110 °C: EPDM deteriorates — consult version with Viton seat\u003c\/li\u003e\n\n  \u003cli\u003e❌ Hydrocarbons: EPDM not compatible\u003c\/li\u003e\n\n  \u003cli\u003e❌ Aggressive acids and alkalis: ductile iron body does not resist\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003eAutomation — ISO 5211 in large diameters\u003c\/h3\u003e\n\u003cp\u003e\n  The ISO 5211 mounting allows the double flanged butterfly valve to be automated with pneumatic or electric actuators. In large diameters (8\" and above), the operating torque is significant — Cematic sizes the correct actuator with the verified safety factor for each diameter and process pressure:\n\u003c\/p\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eSingle or double-acting pneumatic actuator:\u003c\/strong\u003e First choice for large diameters where response speed and torque are priorities. Single-acting NC ensures closure upon air supply failure. \u003ca href=\"\/collections\/valvulas-mariposa-con-actuador-neumatico\"\u003eView butterfly valves with pneumatic actuator →\u003c\/a\u003e\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eGearbox with handwheel:\u003c\/strong\u003e For large diameters where frequent manual operation is required and the necessary torque exceeds the capacity of a lever — the gearbox multiplies the operator's force for tight closure.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eON\/OFF or modulating electric actuator:\u003c\/strong\u003e For installations without a compressed air network or with SCADA integration. \u003ca href=\"\/collections\/valvulas-mariposa-con-actuador-electrico\"\u003eView butterfly valves 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\u003eMunicipal potable water distribution — large diameters:\u003c\/strong\u003e The most frequent application of the double flanged butterfly valve in Mexico. Municipal potable water distribution networks in diameters from 8\" to 24\" use double flanged butterfly valves as section isolation valves. Water operating agencies (SACMEX, CONAGUA, SIAPA, regional OOA) specify the double flanged valve for these diameters in accordance with potable water network design standards.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eWater treatment plants (WTP and WWTP) — large diameters:\u003c\/strong\u003e Isolation of sections in raw water, treated water, and effluent lines in treatment plants where main line diameters exceed 8\". The double flanged valve provides the necessary structural rigidity for larger diameter valves in these installations.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eHigh-flow pumping systems:\u003c\/strong\u003e Isolation valves on the suction and discharge of high-flow pumps in municipal, industrial, and irrigation pumping stations. Ductile iron resists mechanical vibrations from pumps, and EPDM covers standard pumping water.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eIndustrial HVAC — large buildings and facilities:\u003c\/strong\u003e Distribution of chilled water and hot water in climate control systems for large-scale facilities — airports, hospitals, shopping centers, and industrial campuses — where main piping diameters require the double flanged butterfly valve.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eLarge-scale agricultural irrigation systems:\u003c\/strong\u003e Irrigation canals, distribution systems for irrigation districts, and pressurized irrigation headers in large-scale agriculture where main distribution diameters are 8\" to 20\" or more.\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n\n    \u003cstrong\u003eGeneral industry — large diameter process lines:\u003c\/strong\u003e Any industrial application with large diameter process lines with fluids compatible with ductile iron and EPDM — cooling water, process water, industrial effluents — where the double flanged valve provides the necessary robustness and ease of installation.\n  \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\n  For the flangeless, more compact wafer version, see \u003ca href=\"\/products\/valvula-mariposa-wafer-hierro-disco-ss316\"\u003eiron wafer butterfly valve →\u003c\/a\u003e\u003cbr\u003e\n  For the Lug version with dead-end service in smaller diameters, see \u003ca href=\"\/products\/valvula-mariposa-lug-ansi-150-hierro-ductil-epdm\"\u003eLug ANSI 150 butterfly valve →\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\u003e\u003ca rel=\"noopener\" title=\"Ficha Técnica de Válvula Mariposa Doble Brida Asiento EPDM\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-de-mariposa-disco-ss304-brida-150lb-asiento-epdm-ficha-tecnica-pmdf.pdf.pdf?v=1743448368\" target=\"_blank\"\u003e\u003cspan style=\"color: #a31717;\"\u003e\u003cstrong\u003eTechnical Data Sheet (Spanish)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/butterfly-valve-ss304-disc-epdm-seat-150lb-flanged-pmdf.pdf?v=1772468544\" title=\"Butterfly Valve SS304 disc EPDM seat 150LB flanges Data Sheet Cematic\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #a31717;\"\u003e\u003cstrong\u003eData Sheet (English)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Cematic","offers":[{"title":"24\"","offer_id":50266773029177,"sku":"PMDF600","price":7516.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-mariposa-concentrica-doble-brida-asiento-epdm_e628ebdf-8dc6-42fd-8b01-6edb4ad86ebe.jpg?v=1755097640","url":"https:\/\/cematic.com\/products\/valvula-mariposa-doble-brida-ansi-150-hierro-ductil-epdm","provider":"Cematic","version":"1.0","type":"link"}