{"id":6660,"date":"2026-03-30T07:03:49","date_gmt":"2026-03-30T07:03:49","guid":{"rendered":"https:\/\/kateteco.com\/?post_type=product&p=6660"},"modified":"2026-03-30T07:03:50","modified_gmt":"2026-03-30T07:03:50","slug":"lined-butterfly-valve-full-ptfe-pfa-lining-designed-for-strong-acids-alkalis","status":"publish","type":"product","link":"https:\/\/kateteco.com\/en\/product\/lined-butterfly-valve-full-ptfe-pfa-lining-designed-for-strong-acids-alkalis\/","title":{"rendered":"Lined Butterfly Valve \u2013 Full PTFE\/PFA Lining | Designed for Strong Acids & Alkalis"},"content":{"rendered":"

Product Details<\/span><\/h2>\n

Overview<\/span><\/h3>\n

The lined butterfly valve is a corrosion-resistant industrial valve designed specifically for handling highly aggressive media. The valve body and disc are fully lined with fluoroplastics such as PTFE, FEP, or PFA, completely isolating the metal substrate from the process fluid\u00a0. This construction effectively prevents chemical attack on the valve body while maintaining excellent sealing performance. The valve uses a centerline disc design that rotates 90\u00b0 to open or close, providing quick operation with low torque requirements\u00a0.<\/span><\/p>\n

Lined butterfly valves are widely used as cost-effective alternatives to expensive alloy valves in severe corrosive service conditions, offering superior durability and reliability.<\/span><\/p>\n

Key Features<\/span><\/h3>\n

1. Full Fluoroplastic Lining<\/strong><\/span><\/p>\n

    \n
  • \n

    Complete PTFE\/FEP\/PFA lining on body and disc surfaces<\/span><\/p>\n<\/li>\n

  • \n

    Isolates metal components from corrosive media<\/span><\/p>\n<\/li>\n

  • \n

    Prevents corrosion and contamination\u00a0<\/span><\/p>\n<\/li>\n<\/ul>\n

    2. Exceptional Corrosion Resistance<\/strong><\/span><\/p>\n

      \n
    • \n

      Suitable for strong acids (sulfuric, hydrochloric, nitric, hydrofluoric)<\/span><\/p>\n<\/li>\n

    • \n

      Resistant to strong alkalis, organic solvents, and oxidizing agents<\/span><\/p>\n<\/li>\n

    • \n

      Compatible with aggressive chemicals including aqua regia\u00a0<\/span><\/p>\n<\/li>\n<\/ul>\n

      3. Reliable Sealing Performance<\/strong><\/span><\/p>\n

        \n
      • \n

        Soft PTFE seat provides bubble-tight shut-off<\/span><\/p>\n<\/li>\n

      • \n

        Meets ISO 5208 Class VI leakage standards\u00a0<\/span><\/p>\n<\/li>\n

      • \n

        Bidirectional sealing capability<\/span><\/p>\n<\/li>\n<\/ul>\n

        4. Compact & Lightweight Design<\/strong><\/span><\/p>\n

          \n
        • \n

          Wafer or lug connection for space-saving installation<\/span><\/p>\n<\/li>\n

        • \n

          Low operating torque for easy manual or automated operation<\/span><\/p>\n<\/li>\n

        • \n

          90\u00b0 quarter-turn for fast open\/close action\u00a0<\/span><\/p>\n<\/li>\n<\/ul>\n

          5. Wide Material Selection<\/strong><\/span><\/p>\n

            \n
          • \n

            Multiple lining materials available for different temperature requirements<\/span><\/p>\n<\/li>\n

          • \n

            Various actuation options: handle lever, worm gear, electric, pneumatic\u00a0<\/span><\/p>\n<\/li>\n<\/ul>\n

            Technical Specifications<\/span><\/h3>\n
            \n
            \n
            <\/div>\n
            <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n
            Parameter<\/span><\/th>\nDetails<\/span><\/th>\n<\/tr>\n<\/thead>\n
            Model Series<\/span><\/td>\nD71F \/ D371F \/ D671F \/ D971F<\/span><\/td>\n<\/tr>\n
            Size Range<\/span><\/td>\nDN50 \u2013 DN600 (NPS 2\u2033 \u2013 24\u2033)\u00a0<\/span><\/td>\n<\/tr>\n
            Pressure Rating<\/span><\/td>\nPN10 \u2013 PN16 \/ Class 150\u00a0<\/span><\/td>\n<\/tr>\n
            Connection Type<\/span><\/td>\nWafer \/ Lug \/ Flanged\u00a0<\/span><\/td>\n<\/tr>\n
            Operation<\/span><\/td>\nLever handle, worm gear, electric actuator, pneumatic actuator\u00a0<\/span><\/td>\n<\/tr>\n
            Temperature Range<\/span><\/td>\nPTFE: -20\u00b0C ~ 180\u00b0C \/ PFA: -20\u00b0C ~ 200\u00b0C\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

            Material Options<\/span><\/h3>\n
            \n
            \n
            <\/div>\n
            <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n
            Component<\/span><\/th>\nStandard Material<\/span><\/th>\nOptional Materials<\/span><\/th>\n<\/tr>\n<\/thead>\n
            Body<\/strong><\/span><\/td>\nCast Iron, Ductile Iron<\/span><\/td>\nCast Steel, Stainless Steel (304\/316)\u00a0<\/span><\/td>\n<\/tr>\n
            Lining<\/strong><\/span><\/td>\nPTFE (F4)<\/span><\/td>\nFEP (F46), PFA, PCTFE\u00a0<\/span><\/td>\n<\/tr>\n
            Disc<\/strong><\/span><\/td>\nStainless Steel + PTFE fully lined<\/span><\/td>\nStainless Steel + PFA lined, Duplex + PTFE\u00a0<\/span><\/td>\n<\/tr>\n
            Stem<\/strong><\/span><\/td>\nStainless Steel (2Cr13, 304)<\/span><\/td>\n316 Stainless Steel, Monel\u00a0<\/span><\/td>\n<\/tr>\n
            Seat<\/strong><\/span><\/td>\nPTFE<\/span><\/td>\nReinforced PTFE, PFA\u00a0<\/span><\/td>\n<\/tr>\n
            O-Ring \/ Packing<\/strong><\/span><\/td>\nFKM (Viton)<\/span><\/td>\nEPDM, PTFE\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

            Applicable Media<\/span><\/h3>\n
              \n
            • \n

              Strong Acids<\/strong>: Sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, phosphoric acid\u00a0<\/span><\/p>\n<\/li>\n

            • \n

              Strong Alkalis<\/strong>: Sodium hydroxide, potassium hydroxide<\/span><\/p>\n<\/li>\n

            • \n

              Organic Solvents<\/strong>: Acetone, methanol, toluene, various organic compounds\u00a0<\/span><\/p>\n<\/li>\n

            • \n

              Oxidizing Agents<\/strong>: Chlorine, hydrogen peroxide, hypochlorite\u00a0<\/span><\/p>\n<\/li>\n

            • \n

              Other<\/strong>: Aqua regia, salt solutions, corrosive gases\u00a0<\/span><\/p>\n<\/li>\n<\/ul>\n

              Typical Applications<\/span><\/h3>\n
                \n
              • \n

                Chemical Processing<\/strong>: Reaction vessel feed lines, acid transfer systems, solvent handling\u00a0<\/span><\/p>\n<\/li>\n

              • \n

                Pharmaceutical Manufacturing<\/strong>: API production, corrosive fluid control, CIP systems\u00a0<\/span><\/p>\n<\/li>\n

              • \n

                Hydrometallurgy<\/strong>: Ore leaching circuits, electrolyte circulation<\/span><\/p>\n<\/li>\n

              • \n

                Environmental Protection<\/strong>: Wastewater treatment, flue gas desulfurization (FGD), acid neutralization\u00a0<\/span><\/p>\n<\/li>\n

              • \n

                Electroplating Industry<\/strong>: Plating bath circulation, rinse water systems<\/span><\/p>\n<\/li>\n

              • \n

                Chlor-Alkali Industry<\/strong>: Chlorine handling, brine systems<\/span><\/p>\n<\/li>\n<\/ul>\n

                Actuation Options<\/span><\/h3>\n
                \n
                \n
                <\/div>\n
                <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n
                Actuator Type<\/span><\/th>\nDescription<\/span><\/th>\n<\/tr>\n<\/thead>\n
                Lever Handle<\/strong><\/span><\/td>\nStandard for DN50-DN150, manual 90\u00b0 operation with position lock<\/span><\/td>\n<\/tr>\n
                Worm Gear<\/strong><\/span><\/td>\nFor DN200 and above or high torque applications, self-locking design\u00a0<\/span><\/td>\n<\/tr>\n
                Electric Actuator<\/strong><\/span><\/td>\nVoltage: AC220V\/110V\/380V, DC24V; with manual override; explosion-proof available (Ex d\u2161BT4)\u00a0<\/span><\/td>\n<\/tr>\n
                Pneumatic Actuator<\/strong><\/span><\/td>\nDouble-acting or spring-return (fail-safe); air pressure 0.4-0.7MPa; optional positioner, solenoid valve, limit switches\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

                Installation & Maintenance<\/span><\/h3>\n

                Installation Guidelines<\/strong><\/span><\/p>\n

                  \n
                1. \n

                  Thoroughly clean pipelines before installation to remove debris\u00a0<\/span><\/p>\n<\/li>\n

                2. \n

                  Verify flow direction arrow matches actual media flow\u00a0<\/span><\/p>\n<\/li>\n

                3. \n

                  Install valve in upright position on horizontal pipelines whenever possible<\/span><\/p>\n<\/li>\n

                4. \n

                  Ensure flange bolts are tightened evenly in a diagonal pattern\u00a0<\/span><\/p>\n<\/li>\n

                5. \n

                  For actuated valves, allow adequate clearance for maintenance access<\/span><\/p>\n<\/li>\n<\/ol>\n

                  Maintenance Recommendations<\/strong><\/span><\/p>\n

                    \n
                  1. \n

                    Perform spark testing on lining layer to detect any damage\u00a0<\/span><\/p>\n<\/li>\n

                  2. \n

                    Inspect lining for cracking or peeling during regular maintenance cycles\u00a0<\/span><\/p>\n<\/li>\n

                  3. \n

                    Replace seat and O-ring during scheduled overhauls<\/span><\/p>\n<\/li>\n

                  4. \n

                    Check stem packing for leakage and re-tighten if necessary<\/span><\/p>\n<\/li>\n<\/ol>\n

                    Customization Options<\/span><\/h3>\n

                    Custom configurations are available based on specific service conditions:<\/span><\/p>\n

                      \n
                    • \n

                      High-temperature service<\/strong>: PFA lining for up to 200\u00b0C\u00a0<\/span><\/p>\n<\/li>\n

                    • \n

                      Vacuum service<\/strong>: Heavy-duty lining with enhanced adhesion<\/span><\/p>\n<\/li>\n

                    • \n

                      Sanitary applications<\/strong>: FDA-compliant PTFE lining for food\/pharmaceutical use\u00a0<\/span><\/p>\n<\/li>\n

                    • \n

                      Explosive environments<\/strong>: Explosion-proof electric or pneumatic actuators (Ex d\u2161BT4\/CT6)\u00a0<\/span><\/p>\n<\/li>\n

                    • \n

                      Special connections<\/strong>: ANSI, DIN, JIS flange standards available\u00a0<\/span><\/p>\n<\/li>\n<\/ul>\n

                      For custom requirements or technical assistance, please contact us with your detailed operating conditions.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

                      The lined butterfly valve features a full PTFE (F4), FEP (F46), or PFA lining on both the body and disc, providing exceptional corrosion resistance against strong acids, alkalis, solvents, and oxidizing agents\u00a0. With a compact wafer or lug design and 90\u00b0 lever or gear operation, this valve delivers reliable sealing and long service life in aggressive chemical environments. Available in sizes from DN50 to DN600, pressure ratings PN10-PN16, and temperature ranges from -20\u00b0C to 180\u00b0C\u00a0. It is widely used in chemical processing, pharmaceutical manufacturing, hydrometallurgy, and environmental protection applications.<\/p>\n","protected":false},"featured_media":6661,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[54,55],"product_tag":[],"class_list":{"0":"post-6660","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-manual-valve","7":"product_cat-butterfly-valve","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product\/6660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/comments?post=6660"}],"version-history":[{"count":2,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product\/6660\/revisions"}],"predecessor-version":[{"id":6665,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product\/6660\/revisions\/6665"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/media\/6661"}],"wp:attachment":[{"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/media?parent=6660"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product_brand?post=6660"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product_cat?post=6660"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/kateteco.com\/en\/wp-json\/wp\/v2\/product_tag?post=6660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}