{"id":355,"date":"2026-05-13T22:43:05","date_gmt":"2026-05-13T14:43:05","guid":{"rendered":"https:\/\/www.develfluid.com\/?post_type=product&p=355"},"modified":"2026-05-13T22:50:13","modified_gmt":"2026-05-13T14:50:13","slug":"pressure-balance-stainless-steel-expansion-bellows","status":"publish","type":"product","link":"https:\/\/www.develfluid.com\/index.php\/product\/pressure-balance-stainless-steel-expansion-bellows\/","title":{"rendered":"Pressure Balance Stainless Steel Expansion Bellows"},"content":{"rendered":"
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Product Description<\/h2>\n

The Pressure Balance Expansion Joint from DevelFluid is a sophisticated engineering solution designed to accommodate axial and lateral movements while simultaneously neutralizing internal pressure thrust. Fully compliant with EJMA 10th edition codes, this unit utilizes a balancing bellows constant to the line bellows to eliminate the need for heavy-duty main anchors. It is engineered to withstand extreme conditions with working temperatures up to 1200\u00b0C and pressures up to 150 Bar, utilizing premium materials such as Inconel 600, Hastelloy X, and SS316L. This makes it indispensable for high-pressure systems and connections to sensitive equipment like turbines, pumps, and compressors, with both standard and custom flanged configurations available for quick delivery.<\/p>\n<\/div>\n

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Technical Advantages<\/h2>\n
    \n
  • Self-Balancing Mechanism:<\/strong> The unique design automatically balances the force generated by internal pressure, preventing the blind plate force from being transmitted to the piping system or connected machinery.<\/li>\n
  • Equipment Protection:<\/strong> By minimizing nozzle loads, it protects expensive and sensitive equipment such as turbines and pumps from structural stress and misalignment.<\/li>\n
  • Space & Cost Efficiency:<\/strong> It eliminates the requirement for massive main anchors and heavy structural supports, significantly reducing civil engineering costs and saving installation space.<\/li>\n
  • Flexible Material Solutions:<\/strong> Bellows are manufactured from premium alloys including SS304, SS316, Inconel 600, and Hastelloy X to suit diverse domestic and international industrial standards.<\/li>\n<\/ul>\n<\/div>\n
    \n

    Applications<\/h2>\n
      \n
    • Power Industry:<\/strong> Steam turbine exhaust lines and boiler feed-water systems.<\/li>\n
    • Petrochemical & Refining:<\/strong> High-pressure process lines where anchor space is limited.<\/li>\n
    • Chemical Processing:<\/strong> Handling corrosive media under fluctuating pressure and temperature conditions.<\/li>\n
    • Marine & Aerospace:<\/strong> Compact piping systems requiring high reliability and safety.<\/li>\n<\/ul>\n<\/div>\n
      \n

      Installation & Design Standards<\/h2>\n
        \n
      • Standard Compliance:<\/strong> Fully designed and manufactured according to EJMA 10th edition codes and GB\/T 12777 standards.<\/li>\n
      • Structural Integrity:<\/strong> Features integrated tie rods or balancing frames to ensure stable performance under maximum operating loads.<\/li>\n
      • Customization & Supply:<\/strong> Available in standard sizes from DN400 to DN1600 (larger sizes up to DN3000 available), with flexible options for both import and domestic project models.<\/li>\n<\/ul>\n<\/div>\n
        \n

        Product Parameters (Devel Standard)<\/h2>\n
        \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
        Specifications<\/th>\nDetails<\/th>\n<\/tr>\n<\/thead>\n
        Nominal Diameter (DN)<\/td>\nDN400 – DN1600 (larger sizes up to DN3000 available)<\/td>\n<\/tr>\n
        Max Working Pressure<\/td>\nUp to 150 Bar<\/td>\n<\/tr>\n
        Max Working Temperature<\/td>\nUp to 1200\u00b0C<\/td>\n<\/tr>\n
        Bellows Material<\/td>\nSS304, SS316, Inconel 600, Hastelloy X<\/td>\n<\/tr>\n
        Design Code<\/td>\nEJMA 10th Edition<\/td>\n<\/tr>\n
        Connection Standard<\/td>\nANSI, DIN, JIS, GB (Flanged or Weld-end)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
        \n

        The Size of Expansion Bellows (Pressure Balance Type)<\/h2>\n
        \n\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
        Nominal Diameter
        \n(DN)<\/th>\n        		Number of
        \nconvolutions (n)<\/th>\n        		Install Length*
        \nWeld end (mm)<\/th>\n        		Install Length*
        \nWeld end (mm)<\/th>\n        		Install Length*
        \nWeld end (mm)<\/th>\n<\/tr>\n
        mm<\/th>\ninch<\/th>\n<\/tr>\n<\/thead>\n
        400<\/td>\n16<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n780<\/td>\n<\/tr>\n
        450<\/td>\n18<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n870<\/td>\n<\/tr>\n
        500<\/td>\n20<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n920<\/td>\n<\/tr>\n
        600<\/td>\n24<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1010<\/td>\n<\/tr>\n
        700<\/td>\n28<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1140<\/td>\n<\/tr>\n
        800<\/td>\n32<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1240<\/td>\n<\/tr>\n
        900<\/td>\n36<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1370<\/td>\n<\/tr>\n
        1000<\/td>\n40<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1500<\/td>\n<\/tr>\n
        1200<\/td>\n48<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1600<\/td>\n<\/tr>\n
        1250<\/td>\n50<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1750<\/td>\n<\/tr>\n
        1300<\/td>\n52<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1800<\/td>\n<\/tr>\n
        1350<\/td>\n54<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1850<\/td>\n<\/tr>\n
        1400<\/td>\n56<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1900<\/td>\n<\/tr>\n
        1450<\/td>\n58<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n1950<\/td>\n<\/tr>\n
        1500<\/td>\n60<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n2000<\/td>\n<\/tr>\n
        1600<\/td>\n64<\/td>\n8 (4+4)<\/td>\n1200 ~ 2500<\/td>\n1500 ~ 3000<\/td>\n2100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

        Note: *Install length based on the Devel factory standard. Other lengths can be changed according to your requirement.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Product Description The Pressure Balance Expansion Join […]<\/p>\n","protected":false},"featured_media":359,"template":"","meta":{"CBBTypography":[]},"product_brand":[],"product_cat":[29],"product_tag":[],"class_list":{"0":"post-355","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-expansion-bellows","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/product\/355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/media\/359"}],"wp:attachment":[{"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/media?parent=355"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=355"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=355"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.develfluid.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}