Rotary or Recip.?

[gilus02]

A Reciprocating pump has been previously chosen for working in the following condition:

FLUID HANDLED Heavy Residue
PUMPING TEMPERATURE (oC)= 50
VISCOSITY @ P.T CP= 415.44
VAPOR PRESSURE @P.T BARA= 6.029×10^(-8)
DENSITY@P.T (KG/M3)= 975.85

OPERATING CONDITIONS
CAPACITY (M3/Hr)= 0.5
DISCHARGE PRESSURE (BARA)= 1.47
SUCTION PRESSURE (BARA)= 1
DIFFERENTIAL PRESSURE (BAR)= 0.47
DIFFERENTIAL HEAD (M)= 5.79

But I want to propose a rotary pump for the similar condition.
am i making right decision?

Thanks for you help!
Mohammad

 

[LittleInch]

Only if you can find a vendor to do it - make sure before you profer this as a solution.

I have been told previously that about 300cP was the practical limit for a centifugal unit and this one is also very small (0.5 m3/hr??) Small gear pumps or piston pumps are ideal for this sort of duty.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[micalbrch]

There are plenty of manufacturers for metering pumps, progressive cavity (eccentric screw) pumps or - as already suggested - gear pumps in the market. No problem. Choose a good one and not the cheapest.