Pressure filter: pump upstream or D/S?
Pressure filter: pump upstream or D/S?
(OP)
Hi,
If I need to put pump for a pressure filter, what do you recommen, uostream of the filter or downstream of that?
I am interested to hear your experiences.
Thanks
If I need to put pump for a pressure filter, what do you recommen, uostream of the filter or downstream of that?
I am interested to hear your experiences.
Thanks





RE: Pressure filter: pump upstream or D/S?
RE: Pressure filter: pump upstream or D/S?
RE: Pressure filter: pump upstream or D/S?
RE: Pressure filter: pump upstream or D/S?
It makes sense. Just I heard, at the similar conditions,
(Filter+Pump)has more removal efficiency than (Pump+filter).Because some particles "escape" from filter in the latter case. Is that right?
Thanks again
RE: Pressure filter: pump upstream or D/S?
Sometimes true; a strong pump can force flow through & cause channeling in the wrong type of downstream filter, especially if poorly maintained. Whereas, flow will simply cease if clogged filter is on pump inlet side (since max. ΔP is less, maybe only 1 atm depending on initial head).
Don't base design on anecdotal comments. For most conditions, filter should be downstream of pump.
RE: Pressure filter: pump upstream or D/S?
You have provided little information for anyone to make any type of informed comment.
However, you can rest assured that there is no difference in filter efficiency whether the filter preceeds the pump or is after the pump.
The pump location in the process depends on a number of factors such as your discharge pressure, your feed pressure and source, the storage requirements, elevation changes, treatment methods, type of filter, etc. You have not provided any of this information.
RE: Pressure filter: pump upstream or D/S?
Where vacuum filters are used, they typically involve an open top vessel with the pump located after the filter.
Vacuum filters are more efficient than pressure filters at removing very finely divided suspended solids and colloidal particles from water (without filter aid). This is scientifically well documented and, in fact, patents have been awarded based on this phenomenon (none are still in force).
Unless you change the design from pressure filter to gravity filter, then the pump should go before the filter. And, if the pump has the potential to exceed the maximum allowable working pressure of the vessel (for example, if the filter is completely plugged and the pump is deadheaded), then a properly sized pressure relief valve should be installed after the pump.
S. Bush
www.water-eg.com