{"id":4609,"date":"2019-04-02T14:38:53","date_gmt":"2019-04-02T14:38:53","guid":{"rendered":"https:\/\/www.stvvalves.com\/?post_type=product&p=4609"},"modified":"2026-06-09T19:27:49","modified_gmt":"2026-06-09T11:27:49","slug":"flange-knife-gate-valve-din-pn16-cf8-body-dn450","status":"publish","type":"product","link":"https:\/\/www.stvvalves.com\/de\/products\/flange-knife-gate-valve-din-pn16-cf8-body-dn450\/","title":{"rendered":"Flansch-Absperrschieber, DIN, PN16, CF8-Geh\u00e4use, DN450"},"content":{"rendered":"

Industrial Flange Knife Gate Valve for Slurry, Wastewater, Mining, and Process Applications<\/h2>\n

Der DN450 Flange Knife Gate Valve PN16 CF8 Body<\/strong> is specifically engineered for on-off isolation service in challenging applications involving slurry, wastewater, pulp stock, powder, abrasive media, and viscous fluids. Manufactured with a corrosion-resistant CF8 stainless steel body<\/strong>, this valve provides reliable shutoff performance, extended service life, and low maintenance requirements in demanding industrial environments.<\/p>\n

Designed according to DIN standards and rated for PN16 pressure class<\/strong>, the valve features a full-port flow design that minimizes pressure loss and allows efficient handling of media containing suspended solids. The robust knife gate structure enables smooth cutting through slurry and fiber-laden fluids, making it an ideal solution for mining, wastewater treatment, pulp & paper, power generation, cement production, and chemical processing industries.<\/p>\n

Whether installed in municipal infrastructure or heavy industrial operations, this valve delivers dependable isolation performance while reducing operational downtime and maintenance costs.<\/p>\n

\n

Product Overview<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nSpezifikation<\/th>\n<\/tr>\n<\/thead>\n
Produktname<\/td>\nFlansch-Absperrschieber<\/td>\n<\/tr>\n
Nominal Size<\/td>\nDN450 (18 Inch)<\/td>\n<\/tr>\n
Druckrate<\/td>\nPN16<\/td>\n<\/tr>\n
Body Material<\/td>\nCF8 Stainless Steel<\/td>\n<\/tr>\n
Gate Material<\/td>\nEdelstahl<\/td>\n<\/tr>\n
Seat Type<\/td>\nResilient or Metal Seated<\/td>\n<\/tr>\n
Verbindung beenden<\/td>\nFlanged<\/td>\n<\/tr>\n
Flange Standard<\/td>\nDIN PN16<\/td>\n<\/tr>\n
Betrieb<\/td>\nHandwheel, Gearbox, Pneumatic, Electric<\/td>\n<\/tr>\n
Temperature Range<\/td>\n-20\u00b0C to 200\u00b0C<\/td>\n<\/tr>\n
Applicable Media<\/td>\nSlurry, Wastewater, Pulp, Powder, Water<\/td>\n<\/tr>\n
Installation<\/td>\nBi-directional or Uni-directional (Optional)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Hauptmerkmale<\/h2>\n

Heavy-Duty CF8 Stainless Steel Construction<\/h3>\n

The valve body is manufactured from CF8 stainless steel, offering:<\/p>\n

    \n
  • Excellent corrosion resistance<\/li>\n
  • Superior durability in wet environments<\/li>\n
  • Resistance to oxidation and chemical attack<\/li>\n
  • Extended service life compared to carbon steel valves<\/li>\n<\/ul>\n

    CF8 stainless steel is widely used in wastewater plants, chemical facilities, and marine-related applications where corrosion resistance is critical.<\/p>\n

    \n

    Full Port Design<\/h3>\n

    The full-bore structure allows unrestricted flow when the valve is fully open.<\/p>\n

    Benefits include:<\/p>\n

      \n
    • Minimal pressure drop<\/li>\n
    • Improved process efficiency<\/li>\n
    • Reduced clogging risk<\/li>\n
    • Better handling of solids-containing media<\/li>\n<\/ul>\n
      \n

      Precision Machined Knife Gate<\/h3>\n

      The sharpened gate edge is designed to cut through:<\/p>\n

        \n
      • Sludge<\/li>\n
      • Pulp stock<\/li>\n
      • Fibrous materials<\/li>\n
      • Mining slurry<\/li>\n
      • Powder and bulk solids<\/li>\n<\/ul>\n

        This feature ensures reliable shutoff even in difficult operating conditions.<\/p>\n

        \n

        Low Maintenance Requirements<\/h3>\n

        The simple valve structure minimizes wear components and reduces maintenance frequency, helping operators lower lifecycle costs.<\/p>\n

        \n

        Why Choose a CF8 Stainless Steel Knife Gate Valve?<\/h2>\n

        Outstanding Corrosion Resistance<\/h3>\n

        CF8 stainless steel performs exceptionally well in:<\/p>\n

          \n
        • Wastewater systems<\/li>\n
        • Chemical processing<\/li>\n
        • Industrial water treatment<\/li>\n
        • Coastal and humid environments<\/li>\n<\/ul>\n

          Compared with cast iron or carbon steel valves, CF8 offers significantly improved resistance to corrosion and oxidation.<\/p>\n

          \n

          Longer Service Life<\/h3>\n

          The stainless steel body withstands aggressive operating environments, reducing the need for frequent replacements and maintenance.<\/p>\n

          \n

          Improved Reliability<\/h3>\n

          The robust construction ensures dependable performance under demanding operating conditions.<\/p>\n

          \n

          Technische Spezifikationen<\/h2>\n

          Design Standards<\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          Standard<\/th>\nBeschreibung<\/th>\n<\/tr>\n<\/thead>\n
          DIN<\/td>\nFlange Connection Standard<\/td>\n<\/tr>\n
          EN 12266<\/td>\nPressure Testing<\/td>\n<\/tr>\n
          ISO 5211<\/td>\nActuator Mounting (Optional)<\/td>\n<\/tr>\n
          MSS SP-81<\/td>\nKnife Gate Valve Design (Optional)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

          Materials of Construction<\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n\n\n
          Component<\/th>\nMaterial<\/th>\n<\/tr>\n<\/thead>\n
          K\u00f6rper<\/td>\nCF8 Stainless Steel<\/td>\n<\/tr>\n
          Gate<\/td>\nSS304 \/ SS316<\/td>\n<\/tr>\n
          Stengel<\/td>\nEdelstahl<\/td>\n<\/tr>\n
          Sitz<\/td>\nEPDM \/ NBR \/ PTFE \/ Metal<\/td>\n<\/tr>\n
          Verpackung<\/td>\nPTFE<\/td>\n<\/tr>\n
          Fasteners<\/td>\nEdelstahl<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
          \n

          Working Principle<\/h2>\n

          The knife gate valve operates through a vertical sliding gate mechanism.<\/p>\n

          Opening Process<\/h3>\n
            \n
          1. The handwheel, gearbox, or actuator raises the gate.<\/li>\n
          2. The gate moves completely out of the flow path.<\/li>\n
          3. Full flow capacity is achieved.<\/li>\n<\/ol>\n

            Closing Process<\/h3>\n
              \n
            1. The gate moves downward.<\/li>\n
            2. The sharpened edge cuts through media.<\/li>\n
            3. The gate seats firmly against the sealing surface.<\/li>\n
            4. Flow is completely isolated.<\/li>\n<\/ol>\n

              This simple and effective design makes knife gate valves particularly suitable for applications involving suspended solids and abrasive materials.<\/p>\n

              \n

              Anwendungen<\/h2>\n

              Mining Industry<\/h3>\n

              Knife gate valves are extensively used in mining operations for:<\/p>\n

                \n
              • Tailings pipelines<\/li>\n
              • Slurry transportation<\/li>\n
              • Ore processing systems<\/li>\n
              • Thickener discharge lines<\/li>\n<\/ul>\n

                The valve’s cutting action effectively handles abrasive and high-solid-content media.<\/p>\n

                \n

                Wastewater Treatment Plants<\/h3>\n

                Ideal for:<\/p>\n

                  \n
                • Sludge systems<\/li>\n
                • Sewage treatment facilities<\/li>\n
                • Clarifier systems<\/li>\n
                • Effluent discharge pipelines<\/li>\n<\/ul>\n

                  The corrosion-resistant CF8 body ensures long-term reliability in harsh wastewater environments.<\/p>\n

                  \n

                  Pulp and Paper Industry<\/h3>\n

                  Suitable for:<\/p>\n