{"id":436,"date":"2026-09-14T02:48:14","date_gmt":"2026-09-14T02:48:14","guid":{"rendered":"https:\/\/wdlvalve.com\/?post_type=product&p=436"},"modified":"2026-09-18T02:28:46","modified_gmt":"2026-09-18T02:28:46","slug":"h44h-asme-schwenk-ruckschlagventil","status":"publish","type":"product","link":"https:\/\/wdlvalve.com\/de\/product\/h44h-asme-schwenk-ruckschlagventil\/","title":{"rendered":"H44H ASME-R\u00fcckschlagventil mit Schwenkklappe"},"content":{"rendered":"
\n

Product Overview<\/h2>\n

H44H ASME-R\u00fcckschlagklappe<\/strong> is designed to prevent reverse flow in industrial pipeline systems. WDL Valve supplies this valve in ASME Class 150, 300, 600 and 900 pressure ratings, with optional higher-pressure configurations according to project requirements.<\/p>\n

The valve is manufactured according to ASME B16.34 and related API inspection requirements. The disc adopts a swing-type structure with a straight-through flow passage, allowing installation in horizontal pipelines and suitable vertical pipeline arrangements. The internal rocker pin structure helps reduce potential external leakage points.<\/p>\n

For standard pressure classes, the body and cover are bolted. For high-pressure designs above Class 600, the middle flange can be supplied with a pressure self-sealing structure to reduce body weight and improve sealing reliability under pressure.<\/p>\n

Key Product Features<\/h2>\n
    \n
  • Swing disc design for automatic non-return service.<\/li>\n
  • Straight-through flow passage helps reduce pressure loss.<\/li>\n
  • Suitable for horizontal installation and selected vertical pipeline service.<\/li>\n
  • Internal rocker pin structure helps reduce external leakage risk.<\/li>\n
  • Bolted cover structure for standard pressure classes.<\/li>\n
  • Pressure self-sealing cover design available for high-pressure service.<\/li>\n
  • Carbon steel, stainless steel, Monel and hard-faced sealing options are available.<\/li>\n<\/ul>\n

    Technical Specifications<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Manufacturer<\/th>\nWDL-Ventil<\/td>\n<\/tr>\n
    Produkttyp<\/th>\nASME swing check valve<\/td>\n<\/tr>\n
    Modell<\/th>\nH44H-150LB \/ 300LB \/ 600LB \/ 900LB<\/td>\n<\/tr>\n
    Nominal Size<\/th>\nDN50-DN600, depending on pressure class<\/td>\n<\/tr>\n
    Pressure Rating<\/th>\nASME Class 150, 300, 600, 900; higher classes upon request<\/td>\n<\/tr>\n
    Connection<\/th>\nRF flanged ends<\/td>\n<\/tr>\n
    Structure<\/th>\nSwing disc check valve, straight-through flow passage<\/td>\n<\/tr>\n
    Body Materials<\/th>\nASTM A216 WCB, ASTM A351 CF8, CF8M, CF3, CF3M and other materials upon request<\/td>\n<\/tr>\n
    Applicable Service<\/th>\nWater, steam, oil, gas and compatible industrial media, depending on selected material<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Geltende Normen<\/h2>\n
    \n\n\n\n\n\n
    Type<\/th>\nEntwicklung und Fertigung<\/th>\nFace-to-Face<\/th>\nFlange Dimension<\/th>\nDruck-Temperatur-Nennwerte<\/th>\nInspection and Test<\/th>\n<\/tr>\n<\/thead>\n
    Swing check valve \/ lift check valve<\/td>\nASME B16.34 \/ BS 1868<\/td>\nASME B16.10<\/td>\nASME B16.5<\/td>\nASME B16.34<\/td>\nAPI 598<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Pressure Test Data<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n
    Nenndruck
    \nClass<\/th>\n    		Shell-Test<\/th>\nWater Seal Test<\/th>\nAir Seal Test<\/th>\n<\/tr>\n
    MPa<\/th>\nlbf\/in2<\/th>\nMPa<\/th>\nlbf\/in2<\/th>\nMPa<\/th>\nlbf\/in2<\/th>\n<\/tr>\n<\/thead>\n
    150<\/td>\n3.1<\/td>\n450<\/td>\n2.2<\/td>\n315<\/td>\n0.5-0.7<\/td>\n60-100<\/td>\n<\/tr>\n
    300<\/td>\n7.8<\/td>\n1125<\/td>\n5.6<\/td>\n815<\/td>\n0.5-0.7<\/td>\n60-100<\/td>\n<\/tr>\n
    600<\/td>\n15.3<\/td>\n2225<\/td>\n11.2<\/td>\n1630<\/td>\n0.5-0.7<\/td>\n60-100<\/td>\n<\/tr>\n
    900<\/td>\n23.1<\/td>\n3350<\/td>\n16.8<\/td>\n2440<\/td>\n0.5-0.7<\/td>\n60-100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Main Materials<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n
    Body \/ Cover<\/th>\nDisc and Bracket<\/th>\nPin Shaft<\/th>\nDisc Sealing Surface<\/th>\nSeat Sealing Surface<\/th>\n<\/tr>\n<\/thead>\n
    ASTM A216 WCB<\/td>\nWCB<\/td>\nF6a<\/td>\n13Cr \/ STL<\/td>\n13Cr \/ STL<\/td>\n<\/tr>\n
    ASTM A351 CF8<\/td>\nCF8<\/td>\nF304<\/td>\n304 \/ STL<\/td>\n304 \/ STL<\/td>\n<\/tr>\n
    ASTM A351 CF8M<\/td>\nCF8M<\/td>\nF316<\/td>\n316 \/ STL<\/td>\n316 \/ STL<\/td>\n<\/tr>\n
    Monel<\/td>\nMonel<\/td>\nMonel<\/td>\nMonel<\/td>\nMonel<\/td>\n<\/tr>\n
    ASTM A351 CF3<\/td>\nCF3<\/td>\nF304L<\/td>\n304L \/ STL<\/td>\n304L \/ STL<\/td>\n<\/tr>\n
    ASTM A351 CF3M<\/td>\nCF3M<\/td>\nF316L<\/td>\n316L \/ STL<\/td>\n316L \/ STL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Class 150 Dimensions<\/h3>\n
    \n\n\n\n\n\n\n\n
    Gr\u00f6\u00dfe<\/th>\n2″<\/th>\n2-1\/2″<\/th>\n3″<\/th>\n4″<\/th>\n5″<\/th>\n6″<\/th>\n8″<\/th>\n10″<\/th>\n12″<\/th>\n14″<\/th>\n16″<\/th>\n18″<\/th>\n20″<\/th>\n24″<\/th>\n<\/tr>\n<\/thead>\n
    DN<\/th>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n300<\/td>\n350<\/td>\n400<\/td>\n450<\/td>\n500<\/td>\n600<\/td>\n<\/tr>\n
    L mm<\/th>\n203<\/td>\n216<\/td>\n241<\/td>\n292<\/td>\n330<\/td>\n356<\/td>\n495<\/td>\n622<\/td>\n699<\/td>\n787<\/td>\n914<\/td>\n978<\/td>\n978<\/td>\n1275<\/td>\n<\/tr>\n
    H mm<\/th>\n142<\/td>\n166<\/td>\n178<\/td>\n236<\/td>\n252<\/td>\n266<\/td>\n314<\/td>\n368<\/td>\n429<\/td>\n455<\/td>\n410<\/td>\n560<\/td>\n600<\/td>\n880<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Class 300 Dimensions<\/h3>\n
    \n\n\n\n\n\n\n\n
    Gr\u00f6\u00dfe<\/th>\n2″<\/th>\n2-1\/2″<\/th>\n3″<\/th>\n4″<\/th>\n5″<\/th>\n6″<\/th>\n8″<\/th>\n10″<\/th>\n12″<\/th>\n14″<\/th>\n16″<\/th>\n18″<\/th>\n20″<\/th>\n24″<\/th>\n<\/tr>\n<\/thead>\n
    DN<\/th>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n300<\/td>\n350<\/td>\n400<\/td>\n450<\/td>\n500<\/td>\n600<\/td>\n<\/tr>\n
    L mm<\/th>\n267<\/td>\n292<\/td>\n318<\/td>\n356<\/td>\n400<\/td>\n444<\/td>\n533<\/td>\n622<\/td>\n711<\/td>\n838<\/td>\n864<\/td>\n978<\/td>\n1016<\/td>\n1346<\/td>\n<\/tr>\n
    H mm<\/th>\n165<\/td>\n185<\/td>\n205<\/td>\n228<\/td>\n250<\/td>\n275<\/td>\n325<\/td>\n378<\/td>\n410<\/td>\n480<\/td>\n530<\/td>\n575<\/td>\n630<\/td>\n860<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Class 400 Dimensions<\/h3>\n
    \n\n\n\n\n\n\n\n
    Gr\u00f6\u00dfe<\/th>\n2″<\/th>\n2-1\/2″<\/th>\n3″<\/th>\n4″<\/th>\n5″<\/th>\n6″<\/th>\n8″<\/th>\n10″<\/th>\n12″<\/th>\n14″<\/th>\n16″<\/th>\n18″<\/th>\n20″<\/th>\n<\/tr>\n<\/thead>\n
    DN<\/th>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n300<\/td>\n350<\/td>\n400<\/td>\n450<\/td>\n500<\/td>\n<\/tr>\n
    L mm<\/th>\n292<\/td>\n330<\/td>\n356<\/td>\n406<\/td>\n457<\/td>\n495<\/td>\n597<\/td>\n673<\/td>\n762<\/td>\n889<\/td>\n902<\/td>\n1016<\/td>\n1054<\/td>\n<\/tr>\n
    H mm<\/th>\n190<\/td>\n203<\/td>\n229<\/td>\n267<\/td>\n292<\/td>\n330<\/td>\n381<\/td>\n406<\/td>\n457<\/td>\n528<\/td>\n546<\/td>\n597<\/td>\n635<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Class 600 Dimensions<\/h3>\n
    \n\n\n\n\n\n\n\n
    Gr\u00f6\u00dfe<\/th>\n2″<\/th>\n2-1\/2″<\/th>\n3″<\/th>\n4″<\/th>\n5″<\/th>\n6″<\/th>\n8″<\/th>\n10″<\/th>\n12″<\/th>\n14″<\/th>\n16″<\/th>\n18″<\/th>\n20″<\/th>\n24″<\/th>\n<\/tr>\n<\/thead>\n
    DN<\/th>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n300<\/td>\n350<\/td>\n400<\/td>\n450<\/td>\n500<\/td>\n600<\/td>\n<\/tr>\n
    L mm<\/th>\n292<\/td>\n330<\/td>\n356<\/td>\n432<\/td>\n508<\/td>\n559<\/td>\n660<\/td>\n787<\/td>\n838<\/td>\n889<\/td>\n991<\/td>\n1092<\/td>\n1194<\/td>\n1397<\/td>\n<\/tr>\n
    H mm<\/th>\n203<\/td>\n229<\/td>\n235<\/td>\n286<\/td>\n292<\/td>\n330<\/td>\n381<\/td>\n457<\/td>\n584<\/td>\n835<\/td>\n684<\/td>\n752<\/td>\n975<\/td>\n1111<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Class 900 Dimensions<\/h3>\n
    \n\n\n\n\n\n\n\n
    Gr\u00f6\u00dfe<\/th>\n2″<\/th>\n2-1\/2″<\/th>\n3″<\/th>\n4″<\/th>\n5″<\/th>\n6″<\/th>\n8″<\/th>\n10″<\/th>\n12″<\/th>\n14″<\/th>\n16″<\/th>\n<\/tr>\n<\/thead>\n
    DN<\/th>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n300<\/td>\n350<\/td>\n400<\/td>\n<\/tr>\n
    L mm<\/th>\n368<\/td>\n419<\/td>\n381<\/td>\n457<\/td>\n559<\/td>\n610<\/td>\n737<\/td>\n838<\/td>\n965<\/td>\n1029<\/td>\n1130<\/td>\n<\/tr>\n
    H mm<\/th>\n216<\/td>\n254<\/td>\n292<\/td>\n318<\/td>\n343<\/td>\n368<\/td>\n432<\/td>\n546<\/td>\n660<\/td>\n782<\/td>\n838<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Class 1500 Dimensions<\/h3>\n
    \n\n\n\n\n\n\n\n
    Gr\u00f6\u00dfe<\/th>\n2-1\/2″<\/th>\n3″<\/th>\n4″<\/th>\n5″<\/th>\n6″<\/th>\n8″<\/th>\n10″<\/th>\n12″<\/th>\n14″<\/th>\n16″<\/th>\n<\/tr>\n<\/thead>\n
    DN<\/th>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n300<\/td>\n350<\/td>\n400<\/td>\n<\/tr>\n
    L mm<\/th>\n419<\/td>\n470<\/td>\n546<\/td>\n673<\/td>\n705<\/td>\n832<\/td>\n991<\/td>\n1130<\/td>\n1257<\/td>\n1384<\/td>\n<\/tr>\n
    H mm<\/th>\n193<\/td>\n246<\/td>\n288<\/td>\n324<\/td>\n373<\/td>\n466<\/td>\n536<\/td>\n857<\/td>\n950<\/td>\n1020<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Typische Anwendungsbereiche<\/h2>\n
      \n
    • Water, steam, oil and gas pipeline systems<\/li>\n
    • Petrochemical and chemical process units<\/li>\n
    • Power plant auxiliary pipeline systems<\/li>\n
    • Industrielle Hochdruckrohrleitungen<\/li>\n
    • Backflow prevention service in ASME piping systems<\/li>\n<\/ul>\n

      Ordering Information<\/h2>\n

      When requesting a quotation, please provide the valve size, pressure class, body material, sealing material, medium, working temperature, flange standard, installation direction and any special inspection requirements.<\/p>\n

      Dimensions, materials, sealing structure and pressure-temperature limits are subject to the final WDL Valve technical drawing and approved project datasheet.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

      Das ASME-Schwenk-R\u00fcckschlagventil H44H ist f\u00fcr den automatischen R\u00fcckflussschutz in Rohrleitungssystemen der Klassen 150, 300, 600 und 900 ausgelegt. Mit seiner Schwenkscheibenkonstruktion, dem geraden Durchflusskanal und w\u00e4hlbaren Werkstoffen aus Kohlenstoffstahl oder Edelstahl eignet es sich f\u00fcr den Einsatz mit Wasser, Dampf, \u00d6l, Gas sowie f\u00fcr industrielle Anwendungen.<\/p>","protected":false},"featured_media":870,"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":[72],"product_cat":[37,32,31,40,41],"product_tag":[],"class_list":["post-436","product","type-product","status-publish","has-post-thumbnail","product_brand-wdl-valve","product_cat-check-valves","product_cat-valve-materials","product_cat-valve-types","product_cat-carbon-steel-valves","product_cat-stainless-steel-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\/436","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=436"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/media\/870"}],"wp:attachment":[{"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/media?parent=436"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product_brand?post=436"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product_cat?post=436"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/wdlvalve.com\/de\/wp-json\/wp\/v2\/product_tag?post=436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}