FlexfloTM Surge Relievers Fast, Reliable Protection

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

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

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

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

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

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

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

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

Applications Storage Tank Farm Desalination 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

Applications Transmission Refineries At various stages of liquid transmission, surges can occur This includes pump stations, custody transfer stations, and near ESDs Refineries Surge potential exists before and after liquids are refined, typically at receiving, storing, or distribution

Applications Airports Loading/ Unloading Terminals Jet fuel storage and transportation through an airport is a potential surge hazard Loading/ Unloading Terminals Often near bodies of water, surge protection is extremely critical to prevent pipeline breaks at these terminals that load and unload large vessels

Additional Applications Water transportation Processing plant Power plants Mining Coal slurry FPSO Offshore platforms Redistribution of water Distillation towers Petrochemical feed stock Corn oil storage Deep mine pumping River crossings

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

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

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.

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

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.

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.

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

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 Key design feature Top Entry Sizes 2 – 6 in. Max differential 1200 psid Max Inlet/ Outlet 1480 psig Temperature -29 to +66 C

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 Key design feature Stainless steel construction Sizes 1 – 6 in. Max differential 1200 psid Max Inlet/ Outlet 1480 psig Temperature -29 to +66 C

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) Sizes 4 – 12 in. Max differential 1200 psid Max Inlet/ Outlet 1480 psig Temperature -29 to +66 C

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 Sizes 4 – 12 in. Max differential 1200 psid Max Inlet/ Outlet 1480 psig Temperature -29 to +66 C

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)