Wednesday, December 26, 2007

On In-Line Pumps

Saturday, December 01, 2007

Name : M.Vinod Email : vinod01986@gmail.com City : coimbatore Pin Code : 641012 State : tamilnadu

Explain detail about the working,construction,pressure calculation details of inline pump

Practically speaking, every pump is an in-line pump, because it is in-between the line from point of suction to the point of delivery.

In trade practice, a pump is called as an in-line pump only when the line of suction to a pump is already pressurized by a previous pump. So, if there are two pumps in series, only the second pump qualifies to be called as the in-line pump. The second pump boosts the pressure over and above the pressure contributed by the first pump. So, in trade practice the second pump is also called as the booster pump.

By another connotation, an in-line pump is such 'booster' pump, which has suction and delivery nozzles of the pump in parallel planes AND the centrelines of flow at the suction and delivery nozzles collinear. This condition of parallelism and collinearity is also satisfied in a horizontal split casing pump. But in trade practice, the term in-line pump has become synonymous with single stage or multi-stage pumps satisfying parallelism and collinearity and EITHER with a vertical motor, if the pump is mounted on a horizontal pipeline OR with a horizontal motor if the pump is mounted on a vertical pipeline. In-line pumps on vertical pipelines with horizontal motor are mostly small, single stage pumps popularly used as heat pumps, circulating heating fluid in cold climate countries.

Opening Remarks

I have been participating at different fora at various websites and have also been answering queries on Pumps received from different quarters, primarily those forwarded by Mr. Anil Upadhyay, Editor and Publisher of the magazine Pumps India.

This blog will facilitate a compilation of all those interactions.