Tuthill Pumps Ideal for Water and Wastewater Treatment Applications

Tuthill Pumps Ideal for Water and Wastewater Treatment Applications

Fluid Engineering is
proud to serve as the Southeast's go-to source for Tuthill Pump Group's
gear and circumferential pumps.

Tuthill Pump Group has
provided pumps for water and
wastewater treatment applications for over 40 years. Water and
wastewater
treatment necessitates metering many different chemicals and moving
waste
by-products such as sludge. Historically, many municipalities use costly
diaphragm metering pumps that are prone to vapor locking on Sodium
Hypochlorite. Sludge removal is often tried with large progressing
cavity type
pumps that require frequent maintenance. Tuthill Magnetically
Coupled
external gear and HD circumferential piston pumps
are proven
reliable
solutions for municipal chemical metering and wastewater sludge transfer
applications.

Tuthill
Magnetically Coupled external gear pumps
are proven performers for
water and wastewater
treatment applications. They provide metering accuracy up to 0.25% and
turndown
ratios exceeding 100:1. External gear pumps provide smooth flow-reducing
fluid
agitation and eliminate the need for pulsation dampeners. The smooth
flow also
makes external gear pumps flow meter and residual measurement friendly. They operate at motor
speeds eliminating the need for gear reducers. They use standard motors
and
controllers and are easily controlled through a signal feedback system
such as
4 to 20 mA.

The
valve-less flow-through design resists vapor locking by not trapping
gasses
from gassing off Sodium Hypochlorite. The compact design is easily and
quickly
repaired. Magnetically coupled external gear pumps provide unprecedented
life
expectancy, up to 20,000 hours, reducing downtime. Tuthill
Magnetically
Coupled external gear pumps
are available in 316 stainless
steel,
Hastelloy, and titanium with flow range from 1 ml/min to 10 GPM at
differential
pressures to 250 PSI. Magnetically coupled external gear pumps typically
provide improved system performance and substantial economic savings.
They have
proven performance pumping and metering treatment chemicals such as
Sodium
Hypochlorite, Ferric Chloride, Hydrofluorosilicic Acid, Methanol,
Polymer,
Sodium Bisulfite, Sulfuric Acid, Sulfurous Acid, and Alums.

Tuthill
HD circumferential piston pumps
are
an effective solution for handling polymers, sludge and other difficult
fluids.
The heavy-duty non-contact self-priming design can operate dry without
any
damage to the pump.

The Tuthill
HD
design uses an external bearing and timing gear chamber
eliminating
possible contamination, extending pump life. The low shear technology is
ideal
for pumping and metering shear sensitive polymers. The Tuthill HD
circumferential piston pump
technology easily handles a wide
viscosity
range and high differential pressures. The Tuthill HD pump
is
available in ductile iron and 316 stainless steel construction with flow
rates
up to 600 GPM and differential pressures to 450 PSI.

For sealing
effectiveness combined with intermittent run-dry capability, TuffseallTM
cartridge
lip seals
are available for the popular HD sizes. The Tuthill
HD
pump is a robust technology that has proven long life
performance. Tuthill
HD
pumps are proven solutions for metering and transfer of
typical
water and wastewater treatment chemicals such as polymer, and byproducts
such
as sludge, and fly ash.

Water and Wastewater
Solution Examples

60 MGD Vallejo
Sanitation, California uses Tuthill pumps to meter 12.5%
Sodium Hypochlorite, replacing large diaphragm pumps that were vapor
locking.
They are using a Tuthill D-Series Magnetically Coupled external
gear pump
with 2.3 ml/rev displacement constructed of Hastelloy. The pump
flow
varies from .5 to 80 GPH at 60 PSI differential pressure by a variable
frequency drive. Since there are no pulsations, the flow is now measured
by a
flow meter with an analog output signal to the variable frequency drive.

The Tuthill
Magnetically Coupled external gear pumps
have
eliminated vapor locking, eliminated the need for pulsation dampeners,
repair
time, increased the turndown ratio, and reduced chemical usage
differential
pressure by a variable frequency drive. Since there are no

pulsations,
the flow is now measured by a flow meter with an analog output signal to
the
variable frequency drive. The Tuthill Magnetically Coupled
external gear
pumps
have eliminated vapor locking, eliminated the need for
pulsation
dampeners, repair time, increased the turndown ratio, and reduced
chemical
usage.

The
46
MGD Truckee Meadows, Utah
started using Tuthill Magnetically Coupled external pumps in
1994
to meter Methanol. Because of the trouble-free performance of the
Tuthill
external gear pumps, Truckee Meadows specified Tuthill
Magnetically
Coupled external gear pumps
for a recent expansion. In addition
to
Methanol, they are now using Tuthill pumps for 12.5% Sodium
Hypochlorite,
39-47% Ferric Chlorite, and 98% Sulfuric Acid ranging in sizes from 0.11
ml/rev
to 5.3 ml/rev displacements and constructed of 316 stainless steel,
Hastelloy,
and titanium.

Vacaville
Water Treatment, CA replaced a solenoid-actuated diaphragm pump with a
Tuthill
pump in a 12.5% Sodium Hypochlorite injection remote well application.
The
Sodium Hypochlorite is injected into the city water at the remote well
site.
The wells are used for water replenishment and are shut down during peak
electricity
demands typically from noon to 6:00 PM to eliminate electrical
surcharges. The
solenoid-actuated diaphragm pump would frequently vapor lock during
start-up,
requiring an operator to travel to the remote location to manually start
the
pump. Sending a technician to a remote well site each time was not
feasible. To
keep the well operational, they started operating it 24 hours a day
resulting
in a Substantial increase in electricity costs.

Vacaville has 16 remote well sites and now specifies
only Tuthill
Magnetically Coupled external gear pumps
for metering Sodium
Hypochlorite in their well locations.

The
15.4 MGP Napa Sanitary District,
California started replacing
diaphragm pumps with Tuthill T-Sries 2.6 ml/rev 316 stainless steel
magnetically coupled external gear pumps for Sodium Bisulfite in 2001.
The
Tuthill pumps proved to be very reliable and additional Tuthill T-Series
2.6
ml/rev pumps have been added for pumping polymer.

Pig's Eye Waste Water
Treatment Plant, in Minnesota is using a Tuthill model HD 330
circumferential piston pump in ductile iron construction for pumping
dissolved
air floatation (DAF) sludge. In a DAF system, solid particles are
separated
from the liquid phase by flotation. Air is introduced into the system,
creating
fine bubbles that adhere to or are absorbed by the solids causing the
solids to
be buoyant and rise to the surface. The solids are skimmed and then
pumped.

The pumps will see
anything from foam
to thick solids and run dry situations. Tuthill HD pumps handle this
challenging service where the alternatives of centrifugal pumps would
potentially clog, and progressing cavity pumps would be vulnerable to
run dry
conditions.

The 1.2 BGD City of
Detroit
Wastewater Treatment Plant is using Tuthill HD 600 316
stainless
steel circumferential piston pumps to meter polymer and polymer
solution,
replacing progressing cavity type pumps. The Tuthill HD 600 pumps
are
used for two polymer applications. They pump 30,000 CPS raw polymer at
120
GPM and 100 PSI, and 2000 CPS dilute polymer from 70 to 120 GPM at 60
PSI. The
City of Detroit
has been using Tuthill HD pumps for over 45 years. The Tuthill
HD
pumps typically operate for 20 years without a catastrophic
pump
failure, while the progressing cavity type pumps last only 2 to 3 years.
The
City of Detroit
recently increased their capacity by changing from HD 330 pumps to the
HD 600
pump size.

Conclusion

Tuthill pumps are
proven solutions for metering and transfer
of typical water and wastewater treatment chemicals such as Ferric
Chloride,
Hydrofluorosilicic Acid, Methanol, Polymer, Sodium Bisulfite, Sodium
Hypochlorite, Sulfuric Acid, Sulfurous Acid, Methanol, and Alums, and
byproducts such as sludge, and fly ash. Tuthill chemical and corrosion
resistant magnetically coupled external gear pumps resist vapor locking
from
out gassing Sodium Hypochlorite with their valve-less design. They are
easily
applied for metering with their high turndown ratios and accuracies up
to
0.25%. Tuthill HD circumferential piston pumps are
a
non-contact self-priming design with an external bearing and timing
gear
chamber that can operate dry without any damage to the pump. The HD low
shear
technology is ideal for pumping and metering shear sensitive polymers,
and
challenging DAF system wastewater sludge.

Source: Tuthill Process Pumps Products Marketing
Report
Report # 7 (Rev.
04/13/06)

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