{"id":518,"date":"2025-09-16T14:43:28","date_gmt":"2025-09-16T14:43:28","guid":{"rendered":"https:\/\/xtech-eng.com\/?post_type=product&p=518"},"modified":"2025-12-17T08:09:45","modified_gmt":"2025-12-17T08:09:45","slug":"smb-series","status":"publish","type":"product","link":"https:\/\/xtech-eng.com\/?product=smb-series&lang=en","title":{"rendered":"Nippon Gear_SMB series"},"content":{"rendered":"

Limitorque SMB Series: The “Legendary” Valve Actuator for Thermal & Nuclear Power<\/strong><\/h1>\n

In the world of valve actuation, the Limitorque SMB Series<\/b> by Nippon Gear is a global icon of unrivaled durability and performance. With a history of decades operating in the most demanding nuclear and thermal power plants, the SMB Series stands as the gold standard for applications requiring absolute safety and reliability.<\/p>\n

Why is Limitorque SMB Series the Global #1 Choice?<\/strong><\/h2>\n

1. Massive Torque Capability (Up to 27,000 N\u00b7m)<\/strong><\/h3>\n

The SMB line offers 8 unit sizes to meet every load requirement, from light to ultra-heavy duty:<\/p>\n

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  • \n

    Torque:<\/b> Up to 27,500 N\u00b7m<\/b>.<\/p>\n<\/li>\n

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    Thrust:<\/b> Up to 1,100 kN<\/b>.<\/p>\n<\/li>\n

  • \n

    High Compatibility:<\/b> Works seamlessly with Gate and Globe valves, as well as quarter-turn valves (Butterfly, Ball) when combined with secondary gearboxes.<\/p>\n<\/li>\n<\/ul>\n

    2. Intelligent & Safe Operating Mechanism<\/strong><\/h3>\n
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    • \n

      Instant Electric\/Manual Switch:<\/b> Simply engage the declutch lever for manual operation. When the motor starts, the system automatically resets to electric mode<\/b>, ensuring automatic operation priority.<\/p>\n<\/li>\n

    • \n

      Ultra-Precise Torque & Limit Switches:<\/b> Protects valves from overload and ensures precise stopping at any position in the stroke, preventing deviations thanks to the intermittent gearing mechanism.<\/p>\n<\/li>\n<\/ul>\n

      3. Rugged “Heavy-Duty” Engineering<\/strong><\/h3>\n
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      • \n

        Ultra-Durable Gearing:<\/b> Bronze-aluminum alloy worm gears combined with Chrome-moly steel worm shafts, operating in a sealed housing immersed in extreme-pressure grease.<\/p>\n<\/li>\n

      • \n

        Specialized Motors:<\/b> High-torque, low-inertia design with multiple power supply options (AC\/DC\/Pneumatic\/Hydraulic).<\/p>\n<\/li>\n

      • \n

        Maximum Protection:<\/b> Options for IP55, IP67<\/b> standards and rigorous Explosion-proof<\/b> certifications (d2G4, ed3aG3…).<\/p>\n<\/li>\n<\/ul>\n

        4. “Non-Disruptive” Maintenance<\/strong><\/h3>\n

        The smart design allows for easy component replacement without removing the entire actuator:<\/p>\n

          \n
        • \n

          Two-piece drive sleeve for easy replacement.<\/p>\n<\/li>\n

        • \n

          Self-locking<\/b> mechanism prevents the valve from falling freely even when the motor is removed for maintenance.<\/p>\n<\/li>\n<\/ul>\n

          Applications in Key Strategic Industries<\/strong><\/h2>\n
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          • \n

            Energy:<\/b> Nuclear, thermal, and hydroelectric power plants.<\/p>\n<\/li>\n

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            Oil, Gas & Chemicals:<\/b> Areas requiring the highest explosion safety standards.<\/p>\n<\/li>\n

          • \n

            Marine & Shipbuilding:<\/b> Valve operation in corrosive seawater environments.<\/p>\n<\/li>\n<\/ul>\n

            Technical Specifications Summary (SMB Series)<\/strong><\/h2>\n
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            \n
            \n
            \n\n\n\n\n\n\n\n\n\n\n
            Model<\/span><\/td>\nAllowable Thrust (kN)<\/span><\/td>\nAllowable Torque (N\u00b7m)<\/span><\/td>\nMax Shaft Diameter (mm)<\/span><\/td>\n<\/tr>\n<\/thead>\n
            SMB-000<\/b><\/span><\/td>\n30<\/span><\/td>\n170<\/span><\/td>\n30<\/span><\/td>\n<\/tr>\n
            SMB-00<\/b><\/span><\/td>\n62<\/span><\/td>\n360<\/span><\/td>\n44<\/span><\/td>\n<\/tr>\n
            SMB-0<\/b><\/span><\/td>\n105<\/span><\/td>\n1000<\/span><\/td>\n58<\/span><\/td>\n<\/tr>\n
            SMB-2<\/b><\/span><\/td>\n320<\/span><\/td>\n2700<\/span><\/td>\n80<\/span><\/td>\n<\/tr>\n
            SMB-4<\/b><\/span><\/td>\n1100<\/span><\/td>\n11500<\/span><\/td>\n152<\/span><\/td>\n<\/tr>\n
            SMB-5T<\/b><\/span><\/td>\n\u2013<\/span><\/td>\n27500<\/span><\/td>\n230<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
            \n
            <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

            In the world of valve actuation, the Limitorque SMB Series<\/b> by Nippon Gear is a global icon of unrivaled durability and performance. With a history of decades operating in the most demanding nuclear and thermal power plants, the SMB Series stands as the gold standard for applications requiring absolute safety and reliability.<\/p>\n","protected":false},"featured_media":969,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[218],"product_tag":[],"class_list":{"0":"post-518","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-multi-turn-type-en","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/xtech-eng.com\/index.php?rest_route=\/wp\/v2\/product\/518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xtech-eng.com\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/xtech-eng.com\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/xtech-eng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=518"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xtech-eng.com\/index.php?rest_route=\/wp\/v2\/media\/969"}],"wp:attachment":[{"href":"https:\/\/xtech-eng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=518"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/xtech-eng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=518"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/xtech-eng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=518"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/xtech-eng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}