While it smoothly follows the thermal movement of the piping due to thermal expansion, it absorbs the vibrations of the piping and protects the piping and equipment when impact loads such as earthquakes occur.
This is a hydraulic snubber (hydraulic vibration damper) from the German company LISEGA, which boasts the world's top market share in pipe supports (piping support devices). We have standard products in stock at our domestic factory in Japan, enabling us to respond to short delivery times. LISEGA's hydraulic snubbers have been in use for over 40 years. The most common cause of trouble with hydraulic snubbers is oil leakage due to rapid wear, damage, and corrosion; however, LISEGA has optimized the internal sealing mechanism, guides, and hydraulic oil of the hydraulic snubber, ensuring that it functions without issues for at least 23 years in the normal operating conditions of a nuclear power plant, as proven by reliable certification methods. LISEGA hydraulic snubbers guarantee excellent performance and long service life due to the following quality characteristics: - Body parts are made from corrosion-resistant materials - Adoption of a special sealing mechanism - Adoption of a special vibration-resistant guide - Built-in oil reservoir - Approved minimum maintenance-free operating period of 23 years through testing - 60-year design life - Certification of conformity testing according to KTA3205.3 - Product design in accordance with ASME-NCA3800
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basic information
Usage: Mainly for seismic protection devices of plant equipment and piping operated at high temperatures Rated Load: 3 to 1000 kN (Type 30), 550 to 5000 kN (Type 31) Stroke: 100 to 300 mm (varies by model) Main Material: Stainless Steel Ambient Temperature: Up to 80°C Operating Oil: Silicone Oil Equipped with a travel indicator Built-in oil reservoir Extensions can be used for long installation lengths Maintenance lasts up to 23 years Delivered after conducting our specified performance tests For more details, please refer to the product catalog "Standard Support 2020."
Price information
We will provide a quote based on the quantity and specifications, so please feel free to contact us.
Delivery Time
※The delivery date may vary depending on the quantity and specifications, so please feel free to contact us.
Applications/Examples of results
We have numerous delivery records for plant equipment and piping, including nuclear power plants.
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Company information
We provide a comprehensive service from design work to product supply for various supports (platforms - operation platforms, walkways, stairs, handrails, ladders, etc.) and piping support devices (pipe supports) for plants and factory equipment. In the design phase, we conduct structural analysis and strength calculations, as well as planning design and detailed work utilizing 3D CAD (including the creation of installation drawings). Additionally, we offer integrated manufacturing from primary processing to assembly, welding, and painting, all linked with 3D CAD. Regarding piping support devices (pipe supports), we supply high-quality products that are mass-produced continuously using the streamlined production technology of our German partner, LISEGA, which boasts the world's top market share. We maintain a stock of standard products at our domestic factory in Japan, enabling us to respond quickly to short delivery times. 【Products Handled】 - Spring hangers and supports - Constant hangers and supports - Hydraulic snubbers (hydraulic dampers) - Rigid hangers - Pipe shoes and pipe saddles - Secondary steel materials for piping supports (beams and brackets) - Operation platforms (platforms), walkways, stairs, handrails, ladders - Piping racks - Viscoelastic dampers - Spring-type vibration isolation devices (spring devices) - Tuned mass dampers