MTH masters one of the most critical design considerations of
regenerative turbine pumps - the shaping of water passageways to
achieve maximum capacity and pressure while minimizing horsepower
requirements. By optimizing water passageway cross-sectional profiles
for each impeller, MTH improves both efficiency and pressure over
the standards realized by other techniques.
One of the most notable improvements in regenerative turbine pump
technology, incorporated in T31 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
parameters for each pump, peak efficiency is improved and “off
peak” horsepower requirements are reduced as well.
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 the T31 Series 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 T31 Series. The result is a high performance pump
providing efficiency characteristics exceeding those of much more
T31 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 this
gentle fluid entry into the impeller blades and account for the
high inlet efficiency of the T31 Series pumps.
Steep Head/Capacity Curve
Pumping capacity varies only slightly as pressure changes. Steep
pressure characteristic overcomes temporary line resistances.
Self Adjusting Impeller
T31 impellers utilize balancing holes to promote hydraulic self-centering
and to eliminate the need for external adjustment. The impeller
exerts no thrust load on the bearings, thereby extending service
life. Self-centering is equally effective whether mounted in the
horizontal or vertical position.
Extended Reliability Motors
Custom manufactured D3 motors feature a 304 stainless steel shaft
and heavy duty ball bearing for extended life. Single phase ODP
and 3 phase TEFC enclosures are standard, as well as a two-pole,
50Hz/60Hz ratings, and UL and CE Marks.