Water Passage Design
MTH masters one of the most critical design
considerations for regenerative turbine pumps -- the shaping of
water passageways to achieve highest capacity pressure while minimizing
horsepower requirements. By optimizing water passageway cross-sectional
profiles for each impeller, MTH improves both efficiency and pressure
in the T41 Series, and exceeds standards realized by previous
techniques.
Impeller Profile
One of the most notable improvements in regenerative
turbine pump technology incorporated in T41 Series pumps involves
the ability to determine the optimum impeller width and blade
length. These factors have a significant effect on the required
horsepower versus pressure curve for regenerative turbine pumps.
By optimizing these for each T41 Series pump, peak efficiency
is improved and "off peak" horsepower requirements are
reduced as well.
Impeller Blades
After the most favorable impeller profile has
been determined for a particular water passageway cross-section,
MTH calculates the number of blades needed to maximize the performance
of that pump. Current blade design in T41 Series pumps increases
both efficiency and design pressure without the manufacturing
difficulties associated with producing contoured blade impellers.
State-of-the-art computer controlled machines simplify manufacturing
of the various MTH impellers utilized in the T41 Series. The result
is a high performance pump providing efficiency characteristics
exceeding those of more expensive units.
NPSH Requirements
T41 Series regenerative turbine pumps meet
low net positive suction head (NPSH) requirements without efficiency
loss. This is achieved by keeping the inlet fluid velocity low
and then gently accelerating to passageway velocities. Special
ramps are responsible for an almost shockless fluid entry into
the impeller blades and account for the high inlet efficiency
in the T41 Series pumps.
Click here to
see 60Hz English information on the T41 Series Pumps
Composite Curves: T41B thru T41P
Select a family curve to see an individual curve and performance.
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