{"id":625,"date":"2026-09-16T06:59:27","date_gmt":"2026-09-16T06:59:27","guid":{"rendered":"https:\/\/wdlvalve.com\/product\/monel-butterfly-valves\/"},"modified":"2026-09-16T08:23:00","modified_gmt":"2026-09-16T08:23:00","slug":"monel-400-butterfly-valve","status":"publish","type":"product","link":"https:\/\/wdlvalve.com\/de\/product\/monel-400-butterfly-valve\/","title":{"rendered":"Monel 400-Absperrklappe"},"content":{"rendered":"
\n
\n

Monel 400-Absperrklappe<\/h2>\n

Die WDL Monel Butterfly Valve<\/strong> is designed for hydrofluoric
\nacid, seawater and selected reducing chemical media. Monel 400, designated
\nas UNS N04400, is a nickel-copper alloy used where common stainless steel
\nmay not provide sufficient corrosion resistance.<\/p>\n

WDL supplies Monel 400 butterfly valves in wafer, lugged and double-flanged
\ndesigns. Soft-seated, high-performance and metal-seated configurations can
\nbe supplied with manual, pneumatic or electric operation.<\/p>\n<\/section>\n

\n

Why Is Monel 400 Used for Butterfly Valves?<\/h2>\n

Monel 400 combines mechanical strength with resistance to many reducing
\nmedia. It is often considered for hydrofluoric acid systems because the
\nnickel-copper alloy can perform better than common stainless steel under
\ncorrectly controlled HF conditions.<\/p>\n

    \n
  • Suitable for many deaerated hydrofluoric acid conditions<\/li>\n
  • Resistance to seawater and flowing saltwater<\/li>\n
  • Useful performance in selected reducing acids and alkaline media<\/li>\n
  • Good mechanical properties across a broad temperature range<\/li>\n
  • Available for soft-seated and metal-seated valve designs<\/li>\n
  • Suitable for manual or automated process control<\/li>\n<\/ul>\n<\/section>\n
    \n

    Available Valve Configurations<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n
    Artikel<\/th>\nAvailable options<\/th>\n<\/tr>\n<\/thead>\n
    Main material<\/td>\nMonel 400 \/ UNS N04400<\/td>\n<\/tr>\n
    Karosserieform<\/td>\nScheibe, mit Laschen oder mit zwei Flanschen<\/td>\n<\/tr>\n
    Valve design<\/td>\nConcentric, double-offset or triple-offset<\/td>\n<\/tr>\n
    Seat options<\/td>\nPTFE, reinforced PTFE, PFA, elastomer or metal seat<\/td>\n<\/tr>\n
    Betrieb<\/td>\nHebel, Getriebe, pneumatischer Antrieb oder elektrischer Antrieb<\/td>\n<\/tr>\n
    Design references<\/td>\nAPI 609, EN 593, API 598, EN 12266-1 or project specifications<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
    \n

    Applications of Monel Butterfly Valves<\/h2>\n
      \n
    • Hydrofluoric acid production and transfer lines<\/li>\n
    • Fluoride chemical processing systems<\/li>\n
    • Seawater and marine utility pipelines<\/li>\n
    • Chemical and petrochemical processing<\/li>\n
    • Alkali and selected reducing-acid services<\/li>\n
    • Brine and salt-handling equipment<\/li>\n
    • Oil, gas and refinery auxiliary systems<\/li>\n<\/ul>\n<\/section>\n
      \n

      Monel 400 Selection Notes<\/h2>\n

      Monel 400 is not automatically suitable for every hydrofluoric acid
      \ncondition. Dissolved oxygen, aeration, oxidizing salts, temperature,
      \nconcentration and flow velocity can change the corrosion rate. The valve
      \nseat and packing must also be compatible with the process fluid.<\/p>\n

      For seawater service, flow conditions should be reviewed because stagnant
      \nseawater can create different corrosion behavior from continuously moving
      \nseawater. Mixed acids and media containing strong oxidizers may require
      \nanother nickel alloy.<\/p>\n<\/section>\n

      \n

      H\u00e4ufig gestellte Fragen<\/h2>\n

      Is Monel 400 suitable for hydrofluoric acid?<\/h3>\n

      Monel 400 is commonly considered for many hydrofluoric acid applications,
      \nparticularly under reducing or deaerated conditions. Concentration,
      \ntemperature, oxygen and impurities must be confirmed before selection.<\/p>\n

      Can Monel K-500 be used for the valve stem?<\/h3>\n

      Monel K-500 may be considered when higher stem strength is required. Its
      \ncompatibility and heat-treatment condition must be reviewed for the
      \nspecified medium.<\/p>\n

      What information is required for a quotation?<\/h3>\n

      Please provide the valve size, pressure rating, medium composition,
      \nconcentration, temperature, flange standard, seat material, actuator type
      \nand required quantity.<\/p>\n<\/section>\n

      \n

      WDL Monel Valve Supply<\/h2>\n

      WDL supplies customized Monel 400 butterfly valves with drawings, material
      \ncertificates and pressure-test documentation when specified in the order.
      \nSend the operating data to WDL for material review and quotation.<\/p>\n<\/section>\n

      Technical content reviewed: September 2026.<\/p>\n<\/article>","protected":false},"excerpt":{"rendered":"

      WDL Monel 400 Butterfly Valves are designed for hydrofluoric acid, seawater and selected reducing media. Wafer, lugged and flanged designs are available.<\/p>","protected":false},"featured_media":623,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[34,32,31,66],"product_tag":[],"class_list":["post-625","product","type-product","status-publish","has-post-thumbnail","product_cat-butterfly-valves","product_cat-valve-materials","product_cat-valve-types","product_cat-monel-valves","first","instock","shipping-taxable","product-type-simple","entry","content-bg","loop-entry"],"_links":{"self":[{"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product\/625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/comments?post=625"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/media\/623"}],"wp:attachment":[{"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/media?parent=625"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product_brand?post=625"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product_cat?post=625"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product_tag?post=625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}