Pump Efficiencies
Pump Efficiencies
(OP)
I have a discussion with a pump manufacturer about the pump efficiencies. After order it appears that they cannot comply with their quoted efficiencies. They have "forgotten" to include the absorbed power for the double mechanical seals (varies from 0.5 to 1 kW) in their quotation. Now this is unacceptable for me but I cannot find something about guaranteed efficiencies in API 610 or ISO standard. Can somebody give me a clue??
Kind Regard,
Chris





RE: Pump Efficiencies
May not be worth worrying about...pump meets a range of effeciency or is close enough to be picked / ordered. In my world, the 1kw loss is not that big a deal. I'm better moving on to other bigger details / problems. My way of looking at is if pump runs 24/7/365, what are we talking about? Maybe $1,000 a year on high end
RE: Pump Efficiencies
Table 14 of API 610 indeed states that eficciency is NOT a rated value.
Thanks for the input.
Chris
Kind Regard,
Chris
RE: Pump Efficiencies
My previous employer used to request the vendor provide horsepower required by the seal. Other than that, I'm not aware of a standard requiring guaranteed efficiencies.
RE: Pump Efficiencies
RE: Pump Efficiencies
thanks for the info, unfortunately we had to go single source. Pump manufacturer already had about 150 pumps on Client's site. Now with the upgrade they have about 300 pumps on site there. Must be a goldmine for spare parts !!
Pump Manuacturer treats us (engineering contractor) as balast.
Kind regards,
Chris
Kind Regard,
Chris
RE: Pump Efficiencies
It sounds like they did not provide you what they quoted then... right?
Charlie
www.facsco.com