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Flexflo Considerations and Sizing

Flexflo Considerations and Sizing. Flexflo Considerations. Highlights: -Simple, reliable operation: One moving part -Nitrogen loaded valves Flexflo valves have the fastest response time -Valves reseat completely, and can reduce chatter. Limitations

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Flexflo Considerations and Sizing

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  1. Flexflo Considerations and Sizing

  2. FlexfloConsiderations • Highlights: -Simple, reliable operation: One moving part -Nitrogen loaded valves Flexflo valves have the fastest response time -Valves reseat completely, and can reduce chatter • Limitations -Lower flowrates for nominal pipe sizes -Higher initial investment cost in many applications -Individual elastomers each have unique characteristics and limitations

  3. Loading Options • Pilot Loaded: -Standalone performance: Loading pressure sourced from flowing medium -Slow response time with liquid applications • Nitrogen Loaded -Loading with Nitrogen or other inert gas has allows for fast response time, even with liquid service -Overall total flow restricted: jacket pressure does not decrease

  4. Loading Options (continued) • Panel Loaded: -Using a panel to nitrogen load the jacket pressure allows for the benefits of gas loading, add additional features, and addresses the limitations of a loading block -Capacity Boosting properties by venting the jacket pressure • Panel Options: -Vent jacket pressure to allow full open valve -Additional gauges to provide information to operators about process pressure, nitrogen pressure(s), valve state, etc. -Test ports and alarms

  5. Sizing Capacity Table: -Capacity table looks different than most -Cv is replaced by the Maximum Flow Factor, essentially the maximum Cv value at full open -Addition Performance Curve Slope (Cs) term describes performance at less than full open

  6. Sizing Equation • Traditional Sizing Equation: Q: Flowrate in GPM Cv: Valve Coeffecient Kq: Viscosity Correction Factor P: Pressure in psi S.G. : Specific Gravity • Flexflo Sizing Equation: Ff: Flow Factor %OP: Percent Over Pressure

  7. Example Configuration: -12” Model 887 -150 psi Set Point -50 psi Back Pressure

  8. Example Configuration: -12” Model 887 -150 psi Set Point -50 psi Back Pressure Viscous Example: -Representative of Heavy Crude Oil

  9. Example Configuration: -12” Model 887 -150 psi Set Point -50 psi Back Pressure -Representative of Heavy Crude Oil -Capacity Boosting Panel Set to Vent @ 200 psi

  10. Budgetary Pricing • Valves: • 2”-6” 900 TE Top Entry Valves -$2,500 - $10,000 • 1”-6” Model 83 Valves -$1,500 - $9,000 • 4”-12” Model 887 Surge Reliever -$20,000 - $200,000 12” Model 887 150# : $105,000 • Loading Options: • Loading Block -$500-$2000 • Pilot Loading -$1000-$2000 • Panel Loaded -$5,000-$20,000

  11. Q+A Contact: Rob BarchardBarchard Engineering 780-436-6124 Rob.B@BarchardEngineering.com If you would like to receive information about upcoming presentations directly from GE, please send me an email or write down your contact information on the list up front.

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