Inter pressure between the Booster and PD pumps
Inter pressure between the Booster and PD pumps
(OP)
Hello,
I'm trying to size a positive displacement pumps wich delivers 1200 m3/d of oily water to be re-injected into a well at 150 (Wellhead pressure is 150 barg), the oily water is from a seperator at 12m from the grade with an operating pressure of 1.2 bara, the PD pump is 300m (include all the friction losses) from the seperator and the suction line is 6". My questions are:
1- When I propose only a PD pump, the NPSHA estimated (included acceleration head) is negative more than -100m is it clear that a booster pump is necessary or else... I ask this question because thera are some vendor's how propose a PD pump with NPSHRequired of 5.5m and the installation of dumpners reduce the pulsation and a solution for my very low NPSHA.
2- If a Booster pump is sued, How to determine the inter pressure between the booster an PD pump, knowing that the booster pump is at 200m (included all the friction losses) from the seperator.
3- In PD process data sheet, should I indicate the NPSHA with the estimated acceleration or without.
Regards
I'm trying to size a positive displacement pumps wich delivers 1200 m3/d of oily water to be re-injected into a well at 150 (Wellhead pressure is 150 barg), the oily water is from a seperator at 12m from the grade with an operating pressure of 1.2 bara, the PD pump is 300m (include all the friction losses) from the seperator and the suction line is 6". My questions are:
1- When I propose only a PD pump, the NPSHA estimated (included acceleration head) is negative more than -100m is it clear that a booster pump is necessary or else... I ask this question because thera are some vendor's how propose a PD pump with NPSHRequired of 5.5m and the installation of dumpners reduce the pulsation and a solution for my very low NPSHA.
2- If a Booster pump is sued, How to determine the inter pressure between the booster an PD pump, knowing that the booster pump is at 200m (included all the friction losses) from the seperator.
3- In PD process data sheet, should I indicate the NPSHA with the estimated acceleration or without.
Regards





RE: Inter pressure between the Booster and PD pumps
NPSHR of 5.5 m sounds reasonable for a PD pump.
2. To size the booster pump you need the flow and the head. If you have a triplex PD pump, the flow of the booster pump will have to min. 1.3 x flow of the PD pump. The head of the booster pump can be calculated as you have the flow and the pipe details.
3. One or the other. You must only mention "with acceleration head" or "without acceleration head".
RE: Inter pressure between the Booster and PD pumps
RE: Inter pressure between the Booster and PD pumps