PIPELINE SHOCK PREVENTION |
Pressure over Time problems that we solve: |
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Looking at a simple schematic with a centrifugal pump, several alleviators can be used to guard you against startup surge, resonant pump shaft deflection and valve closure shock. |
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1. Reservoir 2. Centrifugal Pump 3. Motorized progressive Valve - Open when pump starts, then close as pressure begins to fall. Avoids acceleration head surge. Open when pump is stopped to prevent vacuum into which liquid rushes back and causes shock 4. Vacuum Breaker - valve used where pump may be stopped suddenly and there is no power for an item 4. to be opened 5. Pressure Instrument taping - Pressure over time traces taken at this point 6. Startup Surge Alleviator - JUMBOFLEX by SHOCKGUARD Ltd. for surge free "soft start" 7. Resonance Decoupler - WAVEGUARD by PULSEGUARD Ltd. stop system response damaging the pump, decouples pump from system 8. Block valves - Liquid over pressure, from expansion 9. High Temp Expansion compensator - Volume compensators by SHOCKGUARD Ltd. LIQUIBELLO all metal, or FLEXORBER with EI DuPont TEFLON 10. SURGEGUARD by SHOCKGUARD Ltd. low pre-fill, high compression ratio units for valve slam water hammer prevention 11. Emergency fast shut down valve |
Explanations - Understanding Frequencies / How shock and surge prevention works
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Visit LIQUID DYNAMICS Intl. Ltd. LDi offers analytical and modeling services. They predict these and similar problems, before pipe systems are built. ShockGuard is a licensed run time user of the LDi Ltd. software, ShockView. ShockView enables us to quickly and accurately run your proposed piping system, in our computers and you what the maximum level of pump start up surge, or shutdown shock will be. |
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Understanding How it Works www.Shock-Guard.com / www.ShockGuard.co.uk Other Important Sites to Help You
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