{"product_id":"valvula-check-columpio-anticorrosiva-pfa-wcb-wafer","title":"Wafer Swing Check Valve Anti-Corrosive WCB | PFA Lined | Horizontal \u0026 Vertical | ½\" to 4\"","description":"\u003ch2\u003eCorrosion-Resistant Swing Check Valve — Wafer Type, WCB Body with PFA Lining, Horizontal and Vertical\u003c\/h2\u003e\n\nThe \u003cstrong\u003ecorrosion-resistant wafer-type swing check valve\u003c\/strong\u003e is the most versatile retention component for extreme corrosive fluids. Unlike gravity-actuated ball check valves, which require mandatory vertical installation, the wafer swing check functions correctly in \u003cstrong\u003ehorizontal and vertical pipelines with upward flow\u003c\/strong\u003e. Its wafer design — without its own flanges, installed directly between pipeline flanges — makes it the most compact and lightweight in the family of corrosion-resistant check valves, occupying minimal axial space in the line.\n\nThe body and disc are made of WCB with a continuous PFA lining — no metal surface is exposed to the fluid. The swing-type disc opens with the fluid flow in the correct direction and automatically closes when the flow stops or attempts to reverse, without a spring or external mechanism — only the disc's weight and fluid backpressure generate the closure.\n\n\u003ch3\u003eWafer Swing vs. Corrosion-Resistant Ball Check — When to Choose Each\u003c\/h3\u003e\n\nBoth valves handle extreme corrosive fluids with PFA lining but have critical operational differences:\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eCriterion\u003c\/th\u003e\n      \u003cth\u003ePFA Wafer Swing Check ← This product\u003c\/th\u003e\n      \u003cth\u003ePFA Ball Check (flanged)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHorizontal installation\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes — first choice\u003c\/td\u003e\n      \u003ctd\u003e❌ No — vertical upward only\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVertical upward installation\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes — mandatory\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eConnection format\u003c\/td\u003e\n      \u003ctd\u003e✅ Wafer — between flanges, no body of its own\u003c\/td\u003e\n      \u003ctd\u003eFlanged — with its own flanges\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAxial space required\u003c\/td\u003e\n      \u003ctd\u003e✅ Minimum — compact wafer design\u003c\/td\u003e\n      \u003ctd\u003eGreater — flanged body with ASME face-to-face\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eClosing mechanism\u003c\/td\u003e\n      \u003ctd\u003eSwing disc — closes by weight and backpressure\u003c\/td\u003e\n      \u003ctd\u003ePTFE ball — drops by gravity\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eClosing speed\u003c\/td\u003e\n      \u003ctd\u003eFast — disc pivots on a hinge\u003c\/td\u003e\n      \u003ctd\u003e✅ Immediate — ball drops instantly\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eParticle tolerance\u003c\/td\u003e\n      \u003ctd\u003eMedium — particles can prevent disc closure\u003c\/td\u003e\n      \u003ctd\u003e✅ Greater — floating ball tolerates fine solids\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCrystallizing fluids\u003c\/td\u003e\n      \u003ctd\u003e⚠️ Crystals can adhere to the disc seat\u003c\/td\u003e\n      \u003ctd\u003e✅ Greater — self-cleaning rotating ball\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eOperating Principle — Springless Swing\u003c\/h3\u003e\n\nThe disc of the swing check valve is articulated on a hinge at the top of the body. It operates in two states:\n\n*     \u003cstrong\u003eFlow in correct direction — open disc:\u003c\/strong\u003e Fluid pressure pushes the disc backward, rotating it on the hinge to the open position. The disc remains open as long as the flow maintains its direction and speed — without any active component to keep it open.\n*     \u003cstrong\u003eStopped flow or backpressure — closed disc:\u003c\/strong\u003e When flow stops or backpressure is generated, the disc falls by its own weight, and backpressure pushes it back against the body seat, sealing the passage. Closure is silent and without abrupt impact — closing speed is modulated by the disc's weight and hinge geometry.\n\n\u003cstrong\u003eSpringless:\u003c\/strong\u003e The absence of a spring eliminates the component most susceptible to corrosion and fatigue in conventional check valves. In aggressive fluids that would attack a metallic stainless steel spring in weeks or months, the springless swing check provides significantly longer service life.\n\n\u003ch3\u003eWafer Construction — Installation Advantages\u003c\/h3\u003e\n\nThe wafer format is the same concept as the wafer butterfly valve: the valve is installed compressed between two pipeline flanges, secured by the flange connection bolts. It has no own flanges — the valve body is the connecting element. Specific advantages in aggressive chemical installations:\n\n* \u003cstrong\u003eMinimum axial space:\u003c\/strong\u003e The wafer's face-to-face dimension is the shortest of all check valve types — ideal for installations with limited space between equipment.\n* \u003cstrong\u003eLighter weight:\u003c\/strong\u003e Without its own flanges, the wafer weighs significantly less than the equivalent flanged check valve — an advantage in elevated installations or in structures with load limitations.\n* \u003cstrong\u003eFewer flanged connections:\u003c\/strong\u003e By installing between existing pipeline flanges, it does not add additional connections to the line — each flanged connection in an aggressive acid line is a potential leak point.\n* \u003cstrong\u003eLower installation cost:\u003c\/strong\u003e No own flanges to bolt — the wafer is installed in minutes between pipeline flanges with existing bolts.\n\n\u003ch3\u003eValve Components\u003c\/h3\u003e\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eNo.\u003c\/th\u003e\n      \u003cth\u003eComponent\u003c\/th\u003e\n      \u003cth\u003eMaterial\u003c\/th\u003e\n      \u003cth\u003eFluid Contact\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e1\u003c\/td\u003e\n      \u003ctd\u003eBody\u003c\/td\u003e\n      \u003ctd\u003eA216 WCB + PFA lining\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes — PFA lined\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e2\u003c\/td\u003e\n      \u003ctd\u003eDisc\u003c\/td\u003e\n      \u003ctd\u003eA216 WCB + PFA lining\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes — PFA lined\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e3\u003c\/td\u003e\n      \u003ctd\u003eLining material\u003c\/td\u003e\n      \u003ctd\u003ePFA\u003c\/td\u003e\n      \u003ctd\u003e✅ Continuous chemical barrier\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e4\u003c\/td\u003e\n      \u003ctd\u003eBolt\u003c\/td\u003e\n      \u003ctd\u003eA193 B7\u003c\/td\u003e\n      \u003ctd\u003eNo\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cstrong\u003ePFA-lined body and disc — no metallic surface exposed to the fluid in any open or closed position.\u003c\/strong\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Wafer swing check valve — installation between flanges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesign Standard:\u003c\/strong\u003e ASME B16.34\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFace to face:\u003c\/strong\u003e ASME B16.10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlanges:\u003c\/strong\u003e Class 150LB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInspection and Testing:\u003c\/strong\u003e API 598\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e A216 WCB + PFA lining\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisc Material:\u003c\/strong\u003e A216 WCB + PFA lining\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Lining:\u003c\/strong\u003e PFA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBolts:\u003c\/strong\u003e A193 B7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal diameters in stock:\u003c\/strong\u003e ½\", ¾\", 1\", 1¼\", 1½\", 2\", 2½\", 3\", 4\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameters on request:\u003c\/strong\u003e 5\", 6\", 8\", 10\", 12\", 14\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e PN16 (232 psi \/ 16 bar)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Temperature:\u003c\/strong\u003e -20 °C to +200 °C — verify concentration and temperature of specific fluid\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Horizontal or vertical with upward flow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClosure:\u003c\/strong\u003e By disc weight and backpressure — springless\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVacuum Capacity:\u003c\/strong\u003e Up to 0.1 mbar according to pressure-temperature curve\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePressure-Temperature Curve\u003c\/h3\u003e\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eTemperature\u003c\/th\u003e\n      \u003cth\u003eApprox. max pressure (PFA)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e-20 °C to +50 °C\u003c\/td\u003e\n      \u003ctd\u003e~15–16 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e100 °C\u003c\/td\u003e\n      \u003ctd\u003e~12–13 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e150 °C\u003c\/td\u003e\n      \u003ctd\u003e~6–7 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e180 °C\u003c\/td\u003e\n      \u003ctd\u003e~6 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e200 °C\u003c\/td\u003e\n      \u003ctd\u003e~6 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eApproximate values according to datasheet curve. Verify official curve for final design.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eChemical Compatibility\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e✅ Hydrochloric acid HCl — any concentration\u003c\/li\u003e\n  \u003cli\u003e✅ Nitric acid HNO₃ — including concentrated\u003c\/li\u003e\n  \u003cli\u003e✅ Hydrofluoric acid HF — any concentration\u003c\/li\u003e\n  \u003cli\u003e✅ Liquid chlorine Cl₂\u003c\/li\u003e\n  \u003cli\u003e✅ Sulfuric acid H₂SO₄ — including concentrated\u003c\/li\u003e\n  \u003cli\u003e✅ Sodium hypochlorite NaClO\u003c\/li\u003e\n  \u003cli\u003e✅ Concentrated alkalis (NaOH, KOH)\u003c\/li\u003e\n  \u003cli\u003e✅ Aggressive organic solvents\u003c\/li\u003e\n  \u003cli\u003e✅ High-purity fluids — no metallic leaching\u003c\/li\u003e\n  \u003cli\u003e⚠️ Fluids with solid particles: PFA ball check is more suitable — particles can prevent tight closure of the swing disc\u003c\/li\u003e\n  \u003cli\u003e⚠️ Always verify specific process concentration and temperature\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMain Applications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eReflux prevention in horizontal acid lines:\u003c\/strong\u003e The most frequent application and the main differentiator compared to the ball check. Any horizontal process line with HF, H₂SO₄, HCl, HNO₃ or ClO₂ requiring retention without reflux — the PFA wafer swing check is the first choice due to its compatibility with horizontal installation.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003ePump protection in corrosive lines:\u003c\/strong\u003e Installed at the discharge of pumps handling corrosive fluids, the swing check prevents aggressive acid from returning to the pump when it stops — protecting the pump's seals and internal components from return water hammer.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eChemical and petrochemical industry:\u003c\/strong\u003e Retention in transport, dosing, and recirculation lines for mineral acids, strong alkalis, and aggressive solvents. The wafer format minimizes the number of flanged connections in the line — critical in acid installations where each joint is a potential leak point.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eMining — acid leaching and SX-EW:\u003c\/strong\u003e Retention in H₂SO₄ leaching circuits and in copper electrodeposition electrolyte lines. The wafer format is especially valued in these installations where space between equipment is limited and the weight of components in metal structures is relevant.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eWater treatment — aggressive reagent dosing:\u003c\/strong\u003e Retention in dosing lines for liquid chlorine, concentrated hypochlorite, and pH adjustment acids. Horizontal installation is possible — an advantage in plants where dosing lines run in horizontal collectors.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003ePharmaceutical and semiconductors:\u003c\/strong\u003e Prevention of cross-contamination between aggressive process fluid lines. PFA does not release extractables into the fluid — essential in high-purity processes where metallic contamination is unacceptable.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eProtection and safety circuits:\u003c\/strong\u003e Prevention of unwanted mixing between two incompatible reagent lines — if both lines converge at one point, the corrosion-resistant check valve in each line ensures that no reagent can flow back into the incompatible reagent line.\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor the complete range of corrosion-resistant valves, see \u003ca href=\"\/en\/collections\/valvulas-de-bola-anticorrosivas-interiores-de-pfa\"\u003ePFA corrosion-resistant valve category →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-check-wafer-columpio-anticorrosiva-wcb-pfa-pcdfl.pdf?v=1777579579\" title=\"Ficha Técnica de Válvula Check Tipo Columpio Anticorrosiva PFA Cematic\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #b72222;\"\u003e\u003cstrong\u003eTechnical Data Sheet\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Cematic","offers":[{"title":"1\"","offer_id":51432693137721,"sku":"PCDFL06","price":5828.55,"currency_code":"MXN","in_stock":false},{"title":"1 1\/2\"","offer_id":51432693170489,"sku":"PCDFL08","price":6276.9,"currency_code":"MXN","in_stock":false},{"title":"2\"","offer_id":51432693203257,"sku":"PCDFL10","price":7621.95,"currency_code":"MXN","in_stock":false},{"title":"2 1\/2\"","offer_id":51432693236025,"sku":"PCDFL12","price":10312.05,"currency_code":"MXN","in_stock":false},{"title":"3\"","offer_id":51432693268793,"sku":"PCDFL14","price":12553.8,"currency_code":"MXN","in_stock":false},{"title":"4\"","offer_id":51432693301561,"sku":"PCDFL18","price":17934.0,"currency_code":"MXN","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/V_lvula_check_tipo_columpio_anticorrosiva_PFA_con_cuerpo_WCB_y_asiento_recubierto_Clase_150.jpg?v=1774293027","url":"https:\/\/cematic.com.mx\/en\/products\/valvula-check-columpio-anticorrosiva-pfa-wcb-wafer","provider":"Cematic","version":"1.0","type":"link"}