You were looking for:

      EUROSTOP SAFETY BUTTERFLY VALVE

      safety_butterfly_valve

      Range:

      • DN 150 - 1400
      • PN 10 - 16 - 25

      The EUROSTOP Safety valve is the most critical security component for high-performance water networks and hydroelectric power plants. Engineered as an automatic protection device, it is designed to detect and respond to abnormal flow conditions—such as downstream pipe bursts or turbine overspeed—triggering a guaranteed autonomous closure. By utilizing a specialized counterweight and hydraulic damping system, it protects infrastructure from catastrophic flooding and water hammer without requiring external power during the emergency phase.

      Applications: Water Hydro Irrigation Industry

      Key Advantages (Protection & Efficiency)

      • Controlled Closing Cycle: Equipped with a hydraulic damper, the valve closes in two distinct stages. This prevents the sudden slamming of the disc, eliminating dangerous pressure surges and protecting the integrity of the pipeline.
      • Energy-Free Operation: The closing movement is powered by a weighted lever (counterweight), ensuring the valve returns to the safe (closed) position even during a total power failure.

      Functional Logic: Two-Stage Closure

      To ensure maximum safety, the hydraulic damper is calibrated to provide:

      1. Fast Closing: To quickly stop the majority of the backflow immediately after the pump stops.
      2. Slow Final Closing: To gently seat the disc in the final degrees of rotation, preventing the "slam" effect and water hammer.

      Applications

      • Pumping Stations: Installed on the discharge side of the pumps to prevent backflow and surges.
      • Lifting Plants: Protection of high-elevation transmission lines.
      • Water Treatment Plants: Management of flow direction in complex piping layouts.
      • Hydroelectric Systems: Backflow prevention in penstocks and turbine circuits

      Materials

       • Body and disc: 500-7 spheroidal cast iron
       • Gasket: EPDM
       • Ring nut: SR235JR carbon steel
       • Rear and front shaft: EN 10088 X30Cr13 (420) stainless steel
       • Bushing: EN 10088 X30Cr13 (420) stainless steel
       • Seal seat: Stainless steel EN 10088-2 X2CrNiMo 17,12,2 (316L)
       • Plate, lever and counterweight: Steel Fe 360B

      Corrosion Protection

       • Epoxy coating with a minimum thickness of 250 microns in compliance with EN 14901
       • Upon request, it is possible to provide a reinforced epoxy coating with a minimum thickness of 300 microns in compliance with EN 14901

      The EUROSTOP Safety valve is the most critical security component for high-performance water networks and hydroelectric power plants. Engineered as an automatic protection device, it is designed to detect and respond to abnormal flow conditions—such as downstream pipe bursts or turbine overspeed—triggering a guaranteed autonomous closure. By utilizing a specialized counterweight and hydraulic damping system, it protects infrastructure from catastrophic flooding and water hammer without requiring external power during the emergency phase.

      Applications: Water Hydro Irrigation Industry

      Key Advantages 

      • Autonomous Failsafe Operation: The valve utilizes a weighted lever (counterweight) system to ensure a full closure even in the event of a total power failure or control system malfunction.
      • Controlled Hydraulic Closing: Equipped with a high-precision hydraulic damping cylinder, the valve closes in two stages to prevent surges and water hammer, protecting the integrity of the upstream pipeline.
      • Versatile Protection Logic: Can be equipped with a mechanical "overspeed paddle" for autonomous pipe-burst detection or integrated with electronic sensors for sophisticated plant protection.
      • Redundant Sealing Performance: Built on the proven double eccentric platform, providing a bi-directional, 100% leak-proof seal (Leak Rate A) once the safety cycle is completed.

      Safety Mechanisms & Logic

      The EUROSTOP Safety valve is highly configurable to suit different safety protocols:

      • Over-velocity Detection (Pipe Burst): A mechanical paddle or electronic flow meter triggers the release of the counterweight if a set velocity threshold is exceeded.
      • Turbine Guard Logic: In hydroelectric plants, the valve acts as the primary safety barrier, closing automatically to prevent turbine runaway or to isolate the unit during emergency trips.
      • Remote Emergency Trip: Activation via solenoid valve (SCADA) allows operators to shut down the line instantly from a remote control room.
      • Gravity-Assisted Energy: The counterweight provides the constant, stored energy required to close the valve, ensuring the system always fails "safe."

      Applications

      • Hydroelectric Power Plants: Essential as a Turbine Guard Valve to protect the generation unit and the penstock.
      • Downstream of Reservoirs: To prevent total drainage of the tank or dam in case of a main line failure.
      • High-Risk Urban Areas: Where a pipe burst would cause significant property damage and infrastructure collapse.
      • Pump Stations: Protection against massive backflow and water hammer during sudden outages.