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Recent content by pmpvlvguy

  1. pmpvlvguy

    immediate need for 8" check valves

    I am a manufacturer of safety related check valves. We can provide N-Stamped or safety related product for emergencies in less than a week depending on model and materials. Please give me a call at 714-528-2301 ext. 232. Regards, Rob Gormley Senior Product Manager Curtiss Wright Flow...
  2. pmpvlvguy

    Emergency Standby Diesel Generators

    I would like to speak with you about your experience with BWR Feedwater check valve performance and EDG performance. Please contact me at rgormley@et.curtisswright.com
  3. pmpvlvguy

    Pump head increased... How??

    You can underfile the edges of the impeller vanes. This will get you up to 3% more head.
  4. pmpvlvguy

    Swing Check Valve

    CHD01 The vmin value of the check valve is the minimum velocity required to hold the disc fully open without oscillation. A swing Check Vmin is 12 fps and above. A Nozzle Check Vmin is a function of spring sizing and orientation and is as low as 3 fps with a weak spring. These values assume...
  5. pmpvlvguy

    Check Valves Waterhammer Characteristics

    The only accurate way to predict the accurate closing time and corresponding pressure surge magnitude of a specific check valve design is to use dynamic performance curves. These curves are specific to check valve models but can be used for different size valves with the same approximate...
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