Auto start Pumps

[thalathb]

Hi All,

Could any one provide help for this matter please, What are the main systems I could not use Auto start pumps or not recomended.

Thanks and Regards
TH

 

[Unotec]

Ropes

<<A good friend will bail you out of jail, but a true friend
will be sitting beside you saying ” Damn that was fun!” - Unknown>>

 

[JLSeagull]

Level
Often if a pump is taking suction from the bottom of a vessel, increasing level above a medium setpoint starts the pump and as the level falls a lower level stops the pump. In such cases for hazardous processes the common practice would include a separate lower level signal to stop the pump in a manner that is outside the controls provided by an automatic selection.

Of course, if the pump is going into a vessel, then the high level would stop the pump and low level would start the pump.

 

[tickle]

I am with Unotec.

 

[786392]

Dear thalathb Hello/Good afternoon,
Somehow your query seems to me as lacking some details.
As to
Where is the pump installed/to be installed?
What is the pump drive?
If on a sump with E/Motor drive then control of level through some float buoyancy actuated mechanical cum electrical switch on-off system should do.

Best Regards
Qalander(Chem)

 

[jamesbanda]

You will find automatic pump starts have varing views from process engineers.

For a continous plant I prefer all pumps to be field start for comissioning. I want my field technicans to hear the pump on starting so to shut it down if it sounds horrible. I've also investigated incidents when we have left drains no blanked or open and a pump started.. a field technican quickly stoped the pump to preven esclation of the issue..

So for hazardous plants unless there is a clear safety reason for remote start I would want only remote stops, and all field starts.

But for remote applications, and regular starts then automatic start should be acceptable.