PulseGuard Pulsation Dampeners

Fluid Flow Control Animations
PulseGuard Pulsation Dampeners
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Centrifugal Pump Pulsation Dampener Installations

FOR SHOCK, "WATER" HAMMER, BACKFLOW CAVITY IMPLOSION ETC. IT IS NOT POSSIBLE TO PRESELECT THE PULSATION DAMPENER. STANDARD INSTALLATIONS How to ensure lowest in place cost and most performance by standard installation methods. FOR SHOCK, "WATER" HAMMER, BACKFLOW CAVITY IMPLOSION ETC. IT IS NOT POSSIBLE TO PRESELECT THE SOLUTION. PLEASE PROVIDE INFORMATION BELOW.


Centrifugal Pump


Pulsation Dampener site - arrow Click Here for pulsation dampeners for centrifugal pumps listed by dimensions and connection size

Choosing Shock Stop Bottles, CHECK LIST:- "Water Hammer Alleviator Work Sheet"
Meeting the Safe Use Requirements of the EC Pressure Equipment Directive.


Pump start-up surge into a pipe that is full. Shut down back flow bang in a 150 yard pipe, sucks out a vacuum, continues to flow away from pump, comes to a halt, rushes back up to hit the void. Rapid valve closure hammer valve slams in 0.1 sec. / 100 ms.
"Pump Start-Up Surge" Acceleration head to overcome the mass in the pipe system after the pump.
Please at the least review 17, 6, 7, 10, 11, 15, 16, + 24, & 25. and answer:-
1. Nitrogen or air pad pressure in top of tank, bars 2. Positive suction head 3. Negative suction head 4. Diameter of the suction line 5. Pressure losses, filters, etc. 1. Nitrogen or air pad pressure in top of tank, bars 2. Positive suction head 3. Negative suction head 4. Diameter of the suction line 5. Pressure losses, filters, etc. 17. Rate of mass transfer kg/sec or SG & GPM 18. Viscosity cP 19. R.P.M. 20. Impeller diameter 21. Metal23. Minimum design metal temperature – mdmt 24. Design temperature 25. Design pressure 26. Max diameter 27. Max height 28. Connection type6. How long after pump start does the spill back loop valve close 7. Time taken for pump start 8. Any increase in elevation 9. Any decrease in elevation 10. Average discharge pipe diameter 11. Length of discharge pipe6. How long after pump start does the spill back loop valve close 7. Time taken for pump start 8. Any increase in elevation 9. Any decrease in elevation 10. Average discharge pipe diameter 11. Length of discharge pipe12. Pressure against which the system is discharging 13. Pipe wall dilatability (wall elasticity kills shock) 14. Liquid compressibility (more system cushioning) 15. Any compatible elastomers 16. Compatible metals12. Pressure against which the system is discharging 13. Pipe wall dilatability (wall elasticity kills shock) 14. Liquid compressibility (more system cushioning) 15. Any compatible elastomers 16. Compatible metals
Pump Shut-Down "back Flow Bang" The mass and velocity of return, filling the void that was cause by continuing to flow away from the pump after it was stopped.
Please at the least review 17, 6, 7, 10, 11, 15, 16, + 24, & 25 and answer:-
1. Nitrogen or air pad pressure in top of tank, bars 2. Positive suction head Negative suction head 3. The length of the suction line 4. Diameter of the suction line 5. Pressure losses, filters, etc.1. Nitrogen or air pad pressure in top of tank, bars 2. Positive suction head Negative suction head 3. The length of the suction line 4. Diameter of the suction line 5. Pressure losses, filters, etc.17. Rate of mass transfer when pump ran kg/sec or SG & GPM 18. Viscosity cP 19. R.P.M. 20. Impeller diameter 21. Metal23. Minimum design metal temperature – mdmt 24. Design temperature 25. Design pressure 26. Max diameter 27. Max height 28. Connection type6. Time for valve to open after pump is turned off 7. Time taken for pump to spin down 8. Any increase in elevation 9. Any decrease in elevation 10. Average discharge pipe diameter 11. Length of discharge pipe6. Time for valve to open after pump is turned off 7. Time taken for pump to spin down 8. Any increase in elevation 9. Any decrease in elevation 10. Average discharge pipe diameter 11. Length of discharge pipe12. Pressure against which the system is discharging 13. Pipe wall dilatability (wall elasticity kills shock) 14. Liquid compressibility (more system cushioning) 15. Any compatible elastomers 16. Compatible metals12. Pressure against which the system is discharging 13. Pipe wall dilatability (wall elasticity kills shock) 14. Liquid compressibility (more system cushioning) 15. Any compatible elastomers 16. Compatible metals
Fast Valve Closure - "Valve Slam Hammer" Deceleration of the mass of liquid in the pipe in a small amount of time.
Please at the least review 17, 6, 7, 10, 11, 15, 16, + 24, & 25 and answer:-
1. Nitrogen or air pad pressure in top of tank, bars 2. Positive suction head Negative suction head 3. The length of the suction line 4. Diameter of the suction line 5. Pressure losses, filters, etc. 1. Nitrogen or air pad pressure in top of tank, bars 2. Positive suction head Negative suction head 3. The length of the suction line 4. Diameter of the suction line 5. Pressure losses, filters, etc. 17. Rate of mass transfer kg/sec or SG & GPM 18. Viscosity cP 19. R.P.M. 20. Impeller diameter 21. Metal6. Time taken for valve closure 7. Time taken for pump to spin down 8. Any increase in elevation 9. Any decrease in elevation 10. Average discharge pipe diameter 11. Length of discharge pipe6. Time taken for valve closure 7. Time taken for pump to spin down 8. Any increase in elevation 9. Any decrease in elevation 10. Average discharge pipe diameter 11. Length of discharge pipe12. Pressure against which the system is discharging 13. Pipe wall dilatability (wall elasticity kills shock) 14. Liquid compressibility (more system cushioning) 15. Any compatible elastomers 16. Compatible metals23. Minimum design metal temperature – mdmt 24. Design temperature 25. Design pressure 26. Max diameter 27. Max height 28. Connection type23. Minimum design metal temperature – mdmt 24. Design temperature 25. Design pressure 26. Max diameter 27. Max height 28. Connection type
Equipment recommendations we make for you, can not be better than the information you give to us.
Suitability for purpose recommendations made on the basis of data & calculations above are with the following normal responsibilities of the parties.
System Design
S.D. to consider
Pump Vendor pump vendor
Bottle Peddler

Check What You Require* Establish the Allowable residual pressure amplitude: - (Shock rebound or "resonance" is sometimes referred to as "Pulsation")

Pressure normung “PN” 10 Bar & ANSI B16.5 150#
Depending on materials and design temperature approx. 275 psi 19 Bar. Shock pressure max.

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Stop Drive belt break-up, keep instant load changes less than 14%.

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To stop tooth chatter wear, depending on machine inertia, keeps pressure transients less than 12%.

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To Stop premature Lift & "weeping", keep all pressure waves that are sustained for in excess of 40 ms below 9% less than static set pressure.
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Prevent bust disk fatigue, by keeping repetitive spikes to less than + / - 4% of steady state pressure.

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If in doubt stay below 5psi transient over pressure to stop pipe fatigue
Examples: 25 ft of 1" pipe with a 100 Hz frequency. Keep the shocks below 10 psi 6500 ft of 20" @ 0.5 Hz, keep below 30 psi.
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For a quotation, Please fax a copy of the printable version of this page to
USA 011 910-270-2739 or UK 01144-(0)161-480-9627

pump start up surgerapid valve closure hammer
shut down back flow bang

PulseGuard Pulsation Dampeners
Dampeners that do, flow goes through but pressure pulsation does not.

PulseGuard pulsation dampeners are designed to address pressure pulsation, which is caused by the resistance of the system to flow. Therefore our dampeners focus on the system related responsibility and are less related to pump liability.

 



Fluid Flow Control Pulsation Dampeners