1.Product Overview

Our products include fluid viscous dampers (FVD) and shock transmission units (STU). Our services include providing purchase recommendation to our clients based on type of structures and seismic resistance strategy of target. Highlights of our FVD products include,

  • Stable in output with excellent performance
  • Highly reliable and easy to install
  • Provide customized service for special needs
  more 
  • Virtually unaffected by ambient temperature
  • Metal spray coating on surfaces of all products
  • Ball connection option for small earthquake and wind resistance

Contact

  886-2-87919198#417
  ast-proj@sinotech.org.tw


2.Warranty

All FVD products are produced under strict quality control systems that meet global and local standards for manufacturing management and quality assurance.
  • Fluid viscous damper (FVD) products all passed TAF laboratory's object and performance assurance test.
  • All products provide warranty certificate that include serial number and test results of the product.
  • Sinotech Inc. provides 15 years limited warranty.

3.FVD

Sinotech FVD products offer significant damping ratio increase and seismic stress reduction in any structure against earthquake and wind.

Contact

  886-2-87919198#417
  ast-proj@sinotech.org.tw

Operating Principles

Fluid viscous damper (FVD) is a velocity dissipating device. Its structure is an incompletely closed cylinder with piston, transforming force into heat to dissipate. The damping force comes from the viscous fluid's inertia and unbalanced pressure, expressed as


where, F is Resistance, C is damping coefficient, V is piston velocity and α is velocity index.Fluid viscous damper has the following properties:
  • Lacking structural stiffness, not affecting structure's cyclic behaviors,
  • Damping applies the same force in the same phase as the velocity,
  • Dissipation determined by C、α. Under the same designed damping force, α<1 has better non-linear dissipating capability

Product Highlights

  • High performance: operation meets design theory, and the variability is far lower than the required specifications.
  • High stability: structure and assembly are high quality, and no maintenance or replacement required during its lifespan.
  • Shock absorption: easy installment, quickly achieving the goal of structural damping or reinforcement.
  • Analysis benefit: damping force has clear dynamic equation, allowing easy dynamic simulation analysis.

Test Comparison

Fluid viscous damper (FVD) products all passed TAF laboratory's object and performance assurance test, exceeding both Taiwanese and international specifications and demonstrating designing excellence.


4.STU

Sinotech Inc.'s shock transmission unit provides the structures at two ends with extra dynamic binding, able to create rigid link and latching force when structure is bearing greater than the service load, effectively transmits the impact among the structure.

Contact

  886-2-87919198#417
  ast-proj@sinotech.org.tw

Operating Principles

Earthquake shock transmission unit(STU) is a velocity locking device. The operating mechanism is like velocity-triggered rigid link, in two conditions according to weight-bearing characteristics:
  • Low-velocity load: when structure is under low-velocity load (service load, temperature load, etc.) STU will only provide under 10% of the designed force and is negligible for actual structural analysis.
  • Dynamic load: when structure under dynamic load (earthquake, wind, train moving, etc.) STU instantly provides the designed force to lock structures at the two ends and effectively change overall structural bearing behaviors.

Product Highlights

  • High performance: provide designed damping force within very short stroke once reaching the locking velocity
  • High quality: verified by hydraulic and overloading, excellent quality with long lasting stable performance without oil leak.
  • Low impact: when external force does not reach the locking velocity, all forces are less than 10% of the.
  • Rust-proof: entire surface is protected by metal spraying coating, and passed the salt spray test; rust-proof even for outdoor installation

Test Comparison

Our STU product has passed AASHTO tests and has been certified by TAF laboratory, guaranteed to meet the designed effectiveness.