Positive displacement pump - No pulsation
Positive displacement pump - No pulsation
(OP)
Hi,
I typically use peristalitic pumps to pump thick sand slurry (60 to 75% solids weight for weight) with a yield stress of up to 120 pa. My flow rate requirements are 1 to 10 litres a second. I typically use the Bredel SPX range, which work well. However, the pulsation in the flow is not ideal. I need a positive displacement pump that can maintain a perfectly smooth continuous laminar flow from the end of the discharge pipe (i.e no variation in the projection of the slurry as it flows from the end of the pipe). I am thinking to buy a screw pump and mount it below my delivery tank which holds 4 m3 of slurry agitated with a mixer. However, i have no experience with these types of pumps and i'm not sure it can deliver a perfectly smooth flow. I also have to fix the flow rates so an inline flow meter would have to be used to set the pump speed to deliver the specified flow rate.
The distance I am pumping is 10m from the mixer tank to the discharge point. It can be increased slightly to help smooth the flow rate if necessary.
I'd appreciate any advice on other options to smooth the flow using any type of positive displacement pump. I've been banging my head against a wall for almost two years now.
Many thanks
I typically use peristalitic pumps to pump thick sand slurry (60 to 75% solids weight for weight) with a yield stress of up to 120 pa. My flow rate requirements are 1 to 10 litres a second. I typically use the Bredel SPX range, which work well. However, the pulsation in the flow is not ideal. I need a positive displacement pump that can maintain a perfectly smooth continuous laminar flow from the end of the discharge pipe (i.e no variation in the projection of the slurry as it flows from the end of the pipe). I am thinking to buy a screw pump and mount it below my delivery tank which holds 4 m3 of slurry agitated with a mixer. However, i have no experience with these types of pumps and i'm not sure it can deliver a perfectly smooth flow. I also have to fix the flow rates so an inline flow meter would have to be used to set the pump speed to deliver the specified flow rate.
The distance I am pumping is 10m from the mixer tank to the discharge point. It can be increased slightly to help smooth the flow rate if necessary.
I'd appreciate any advice on other options to smooth the flow using any type of positive displacement pump. I've been banging my head against a wall for almost two years now.
Many thanks





RE: Positive displacement pump - No pulsation
However, if possible (location) I suggest you rent a "Screw" pump and run some tests.
prognosis: Lead or Lag
RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
http://www.watson-marlow.com/Documents/knowledge-h...
Walt
RE: Positive displacement pump - No pulsation
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RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
I used to peddle Monoflo pumps many, many moons ago and was trained in their Manchester, England factory. I recall that natural rubber stator is the very best material for sand; back then the best they could do for a rotor would have been some sort of hardened stainless. The rotor actually rolls along the stator and does not scrape along it. While it will certainly wear out; I think I would try the PC pump first; certainly no pulsations.
If the owner wants somethng that will last the longest, a shovel and a laborer would be the best choice; although depending on the laborer's technique, pulsations could be a problem.
RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
P slurry application ?
I wonder what is the different on progressive cavity and screw pump suitability applicationn, is scree pump is more for higher flow
RE: Positive displacement pump - No pulsation
RE: Positive displacement pump - No pulsation
Is it possible to change the process to utilize a screw converyor?