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Flexflo TM Surge Relievers

Flexflo TM Surge Relievers. Fast, Reliable Protection. Transient Pressure Surge vs. Overpressure Condition. O verpressure condition : Pressure steadily and evenly builds in the pipeline. Pressure over time may exceed pipeline rating. Transient Pressure Surge vs. Overpressure Condition.

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Flexflo TM Surge Relievers

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  1. FlexfloTM Surge Relievers Fast, Reliable Protection

  2. Transient Pressure Surge vs. Overpressure Condition • Overpressure condition: • Pressure steadily and evenly builds in the pipeline. • Pressure over time may exceed pipeline rating.

  3. Transient Pressure Surge vs. Overpressure Condition • Overpressure condition: • Causes include: • Pumps steadily building head • Centrifugal pumps are shut down but impeller continues to spin • Malfunctioning upstream pressure regulators

  4. Transient Pressure Surge vs. Overpressure Condition • Overpressure condition: • Can be mitigated by: • Relief valves • Back pressure regulators

  5. Transient Pressure Surge vs. Overpressure Condition • Transient Pressure Surge: • Rapidly developing change in pressure of liquids. • Pressure oscillates as wave moves through pipeline • Requires fast relief

  6. Transient Pressure Surge vs. Overpressure Condition • Transient Pressure Surge: • Causes include: • Pump start-up • Pump trip (e.g. due to electrical failure) • Changes in control valve position (intentional or not)

  7. Transient Pressure Surge vs. Overpressure Condition • Transient Pressure Surge: • Causes include: • Check valves actuating • Emergency shut-down valves (ESD) • Sudden variation in demand

  8. Surge Sources • Valves closures • Pump start / shutdown • Emergency Shutdown Valves (ESD) • Check valves actuating • Sudden demand variation

  9. Applications • Anywhere there is a valve that can close, a pump that can malfunction, or an ESD that can engage, you have a potential surge • Companies who are moving, storing, refining, and producing liquids may be at risk of damage caused by surges

  10. Applications • Storage Tank Farm • As fluid is being pumped in and out of storage tanks, both the pumps and the valves represent surge potential. • Desalination • Surge Relievers protect equipment from water hammer during the desalination process

  11. Applications

  12. Applications

  13. Additional Applications

  14. Portfolio • Model 900TE • 2” – 6” • Top Entry • Model 83 • 1” – 6” • Stainless Steel • Model 80 • 4” – 12” • Can be pilot operated • Model 887 • 4” – 12” • Modified for speed

  15. Flexflo Principle of Operation • All Flexflo valves consist of certain common elements: • Flexible rubber tube • Metal core • Housed inside body

  16. Flexflo Core • Central barrier separates inlet and outlet cavities. • Slots allow fluid to flow around barrier when valve is open. • Tube stretches around core, sealing the passage between inlet and outlet.

  17. Flexflo Jacket • Jacket (space between tube and body or liner) is filled with pressurized fluid.

  18. Flexflo Principle of Operation Normal operation: Pipeline pressure is less than jacket pressure plus cracking pressure. Jacket pressure forces tube against core. Valve is closed.

  19. Flexflo Principle of Operation Valve set point is reached: Pipeline pressure exceeds jacket. Tube is forced away from core. Fluid flows around barrier into downstream line.

  20. Flexflo Principle of Operation Surge event passes: Pipeline pressure returns to normal. Jacket pressure reseats tube against core. Valve closes.

  21. Flexflo Model 900TE Regulator • Applications: • Oil, gas and water pressure control • Pressure reducing and backpressure control • Surge relief • On-off service • Benefits: • Low noise • Rugged top entry design ideal for demanding pipeline applications • Easy in-line maintenance • Accessibility without removal of pilot or plumbing • No hydraulic oil or internal springs required

  22. Flexflo Model 83 Regulator • Applications: • Oil, gas, and water pressure control • Corrosive service • Surge relief • On-off service • Benefits: • No hydraulic oil or internal springs required • Reduced capacity trims • Low noise • Ideal regulator when space is limited

  23. Flexflo Model 80 Regulator • Applications: • Oil and water pressure control • Surge relief • Benefits: • Pilot-operated or Nitrogen-loaded (with separate plenum) • Core optimized for liquid service • Line-removable design (flanges remain in line)

  24. Flexflo Model 887 Liquid Surge Reliever • Sample Applications: • Tank farms • FPSOs • Liquid loading/offloading terminals • Desalination plants • Offshore platforms • Oil boosting station • Benefits • Exceptionally fast-acting • Bubble-tight seal • Easy to maintain • Simple, reliable design • Extremely durable

  25. Loading Options • Pilot-Operated Systems • Gas-Loading Systems • Loading Block • Control Panel (CP1) • Capacity-Boosting Systems • Capacity-Boosting Panel (CB) • Capacity-Boosting, Alarm, and Test Panel (CBAT)

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