Priming a Pump in Suction Lift Service
Priming a Pump in Suction Lift Service
(OP)
Problem Statement: The pump (shown in the crude sketch attached) is a basic overhung, centrifugal pump which is required to pump out salt water from a pond (at approximately 20 m3/h). Due to the suction line extending over the bund wall to enter the pond, there is an accumulation of air in the suction line between the water level and the top of the pipe, when the pump is stopped. When the pump is put online, the air is drawn into the pump and causes seal failure due to dry-running.
Additional Info: The suction line is approximately 100m in overall length.
Request: What options are available to evacuate the suction line of air? Currently, I am investigating the feasibility of having the suction line drilled right through the bund wall horizontally. What other options are available?
Additional Info: The suction line is approximately 100m in overall length.
Request: What options are available to evacuate the suction line of air? Currently, I am investigating the feasibility of having the suction line drilled right through the bund wall horizontally. What other options are available?





RE: Priming a Pump in Suction Lift Service
Either that or stop it draining out in the first place with a foot valve
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Priming a Pump in Suction Lift Service
RE: Priming a Pump in Suction Lift Service
This is an example http://www.builditsolar.com/Projects/WaterHeating/...
However given you have quite a long line the vessel might need to be excessively large....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Priming a Pump in Suction Lift Service
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Priming a Pump in Suction Lift Service
Artisi - I am open to any, and all proposals, but obviously, cost efficiency will be a major driver.
RE: Priming a Pump in Suction Lift Service
as suggested by LittleInch, with a gate or butterfly valve on the discharge of the pump.
Operation: close the discharge valve, run the air ejector until the casing in full, start the pump unit and open the discharge valve, and close the isolation between ejector and case, shut off the air supply to the ejector.
The simplest trouble free method.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Priming a Pump in Suction Lift Service
RE: Priming a Pump in Suction Lift Service
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Priming a Pump in Suction Lift Service
foot valve in high concentration brine service may be problematic.RE: Priming a Pump in Suction Lift Service
http://parkusa.com/index.php/products/waste-water/...