Which one? Gear or Screw?
Which one? Gear or Screw?
(OP)
Hi
I want to know when handling fluids with high viscosity up to 900 which pump is better performance?
Gear pump or screw pump?
Is there any recommendation how to select a suitable pump for viscous fluids? a chart or table based on capacity, head,...?
Best Regards
I want to know when handling fluids with high viscosity up to 900 which pump is better performance?
Gear pump or screw pump?
Is there any recommendation how to select a suitable pump for viscous fluids? a chart or table based on capacity, head,...?
Best Regards





RE: Which one? Gear or Screw?
Best regards
Morten
RE: Which one? Gear or Screw?
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: Which one? Gear or Screw?
And I agree with MoltonA. A progressive cavity/eccentric screw pump is better than a gear pump for viscous fluids.
RE: Which one? Gear or Screw?
Conceivably, the best pump could be a gear, a PC pump, a two screw pump, or a three screw pump. How can anyone jump to conclusions about a PC pump, based on the given information?
RE: Which one? Gear or Screw?
RE: Which one? Gear or Screw?
Best regards
Morten
RE: Which one? Gear or Screw?
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: Which one? Gear or Screw?
I am wondering which type of Positive Displacement pump is suitable? Screw or Gear? and Why?
Moreover, i dont know about PC pump? is there any reference about these kind of pump?
Thanks
RE: Which one? Gear or Screw?
Can you explain about your resons for selecting eccentric screw pump than a gear one? Are there any criteria about this?
RE: Which one? Gear or Screw?
A PC pump at this temperature, you'd have to carefully select the elastomer for the stator. As well as the fact that you'll have a hard time finding one that will do the capacity you have listed.
With a 3 screw pump, the fuel oil will lubricate the screws, so as long as it's reasonably clean, you'll get long life.
RE: Which one? Gear or Screw?
What are the advantages of selecting a 3 screw pump than a gear pump? i think its better to select a gear pump.
RE: Which one? Gear or Screw?
RE: Which one? Gear or Screw?
RE: Which one? Gear or Screw?
RE: Which one? Gear or Screw?
http://www.youtube.com/watch?v=BM-vUd9fAbc
Progressive Cavity pump. (PC)
http://www.youtube.com/watch?v=RaFLfSjDIjo&NR=...
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Which one? Gear or Screw?
RE: Which one? Gear or Screw?
One consideration in looking at the screw pumps is the number of mechanical seals you would need. If the manufacturer recommends external bearings, you will have 2 mechanical seals on each shaft.
RE: Which one? Gear or Screw?