aida2011
Mechanical
- Jun 25, 2013
- 62
Dear friends,
I have a PACO pump (Grundfos) rated at 230 m3/h and 40 m head (4.0 bar). I enclosed the pump specs and curve for you all to analyze.
In actual running condition, the pump can deliver 230 m3/h but it cannot deliver the required pressure. The pump can deliver up to 1.2 bar only, far from the rated 4.0 bar. The maximum load recommended by the manufacturer is 63 amp, but at 1.2 bar the load is already 57 amp. The plant requires at least 2 bar, so we have to run two pumps to obtain 2.1 bar. If we run both, we will not have a spare pump.
The pump is not running on VFD. We need to throttle the outlet valve a bit to prevent motor load increase that would trip the pump. The motor power is 45 kW. Please I need your expert inputs.
Miss Aida Hanani
Plant Engineer
Malaysia
I have a PACO pump (Grundfos) rated at 230 m3/h and 40 m head (4.0 bar). I enclosed the pump specs and curve for you all to analyze.
In actual running condition, the pump can deliver 230 m3/h but it cannot deliver the required pressure. The pump can deliver up to 1.2 bar only, far from the rated 4.0 bar. The maximum load recommended by the manufacturer is 63 amp, but at 1.2 bar the load is already 57 amp. The plant requires at least 2 bar, so we have to run two pumps to obtain 2.1 bar. If we run both, we will not have a spare pump.
The pump is not running on VFD. We need to throttle the outlet valve a bit to prevent motor load increase that would trip the pump. The motor power is 45 kW. Please I need your expert inputs.
Miss Aida Hanani
Plant Engineer
Malaysia
