Questions about pulsation dampeners for recip pump
Questions about pulsation dampeners for recip pump
(OP)
Guys here's a couple questions for you. These are in relation to gas-charged, bladder-type pulsation dampeners used on the suction and discharge of piston (reciprocating) pumps used in boiler feedwater service.
1) Does it make any difference if I charge the bladder with air instead of nitrogen? I say no, since the properties of the two gases (density, speed of sound, etc.) are very similar.
2) Do any of you know anybody who makes high-temperature bladders? My pumping temperature is 240° F and the bladders don't last too long in this service. We are changing them out about every month which is not acceptable. It's not possible to cool the pumpage, unfortunately.
1) Does it make any difference if I charge the bladder with air instead of nitrogen? I say no, since the properties of the two gases (density, speed of sound, etc.) are very similar.
2) Do any of you know anybody who makes high-temperature bladders? My pumping temperature is 240° F and the bladders don't last too long in this service. We are changing them out about every month which is not acceptable. It's not possible to cool the pumpage, unfortunately.
Thanks!
Pete





RE: Questions about pulsation dampeners for recip pump
RE: Questions about pulsation dampeners for recip pump
Not sure if that would be a practical solution for you.
RE: Questions about pulsation dampeners for recip pump
electricpete,
A long run of uninsulated pipe will introduce a lot of line losses between the main piping and the dampener, enough to generate too much resistance for the dampener to do its work. They should always be installed as close as possible to pump suction & discharge to minimize line losses between the pump and the damper.
RE: Questions about pulsation dampeners for recip pump
The orientation below the pipe should allow the fluid to cool off and cool water will remain at the bottom.
Diamter of pipe should help address losses which limit effectiveness.
Just a thought. If there is a material out there to handle the temperature that should work as well.
RE: Questions about pulsation dampeners for recip pump
RE: Questions about pulsation dampeners for recip pump
BobPE
RE: Questions about pulsation dampeners for recip pump
RE: Questions about pulsation dampeners for recip pump
One question how often does someone check the pre-charge in the pulsation dampers.
Echoing the questions of BobPE can you give us more info and include pre-charge in the dampers.
regards
desertfox
RE: Questions about pulsation dampeners for recip pump
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