Batescrew Axial Flow Pumps.
Impeller Performance Curves.

Batescrew's Technical Services Department is available to assist in developing performance data, or will provide a complete pump analysis as part of our design calculation service.
See... Free Calculation Service    Use links in the table below to access curves.

Performance curves are generated from actual test data and describe the characteristics of individual impellers under test but do not directly provide performance figures to be expected of a pump.  Curves are used for impeller comparison and selection.
To calculate expected pump performance, a true value for Total Dynamic Head is needed, found by adding all of the dynamic losses within a system, to a known value for Static Head.
Dynamic losses are influenced by the various flow velocities occurring at different points in a system and include the following:
     All losses occurring in pipes, bends etc. leading to a sump.
     The influence of sump design on pump intake loss.
     Pump losses arising in wet end, column and discharge head.
     All discharge-end losses in pipes, bends, valves, outlet bubblers etc.

Our Axial Flow impellers are identified by a three-part number, e.g.  14/15/7 is an impeller measuring 14 Diameter by 15 Pitch and having a 7 diameter Hub.

Impeller Performance Curves
Click impeller size to display its curve.

4/5/2
2880rpm
9/8/4.5 9/14/4.5 14/9/3
1488rpm
14/12/3
970rpm
17/21/8.5 32/60/16
4/5/2
variable
9/9/3 11/9/3 14/9/3
980rpm
14/12/7
1470rpm
21/24/10.5  
5/6/2.5 9/12/3 11/12/3 14/10.5/7 14/12/7
970rpm
21/26/10.5  
7/10.5/3.5 9/12/4.5 11/12/5.5 14/12/3
1491rpm
14/15/7 24/30/12