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Wilfley Pumps Product Page |
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Dynamic
Seals |
Dynamic
sealing -- or hydrodynamic sealing -- is accomplished
by a combination of pumping vanes on the rear shroud of the
impeller and a secondary expeller located behind the impeller,
which rotating with the shaft, impart a rotary movement on
the liquid in the pump resulting in the liquid centrifugally
moving away from the center shaft penetration in the case.
An equilibrium in the back of the pump
is achieved between the pressure of the liquid in the pump
and the atmosphere, creating an air void at the shaft penetration
of the case while the pump is running.
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The dynamic seal provides for zero
leakage of the pumped product without the need for costly mechanical
seals, packing, and lip seals or in most cases seal water and
the associated supporting seal water systems. Product dilution
due to seal water is further eliminated.
With no rubbing seal components to fail
over time, the dynamic seal can operate reliably over the life
of the hydraulic wet end of the pump.
Dynamic seals can offer reliable service
in difficult applications that may include; varying amounts
of solids, liquids that are close to saturation prone to crystallizing,
scaling liquids and where operational upsets such as cavitation,
dead heading of the pump and even dry running can occur.
Wilfley pioneered dynamic seals obtaining
a US patent in 1920. All Wilfley pumps can be offered with Wilfley
dynamic seals for difficult applications handling clear liquids
and slurries with corrosive and erosive properties. |
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| Slurry
Pumps |
Slurry Pump Model K
Wilfley's Model K solids-handling centrifugal pump is designed
for abrasive solids applications such as those found in aggregate,
cement, lime slurries and many other common industrial and mining
applications.
Markets
Cement, sand & gravel, fines recovery systems
Industrial minerals: potash, kaolin clays, sodium carbonate,
titanium dioxide
Mineral processing: copper, iron ore, lead/zinc
Waste water: grit, lime, pH control
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Applications
Cyclone and screen feed
Cement kiln feed and transfer applications
Thickener under/over flow
Tailings
Transfer applications
Loading/unloading applications
Capacities
Size ranges from 2x1 to 14x10, from less than 50 GPM/2.2 m3/hr
up to 6,000 GPM/910 m3/hr. Head capabilities ranging up to
200 ft/90 meters depending upon pump size.
Materials of Construction
Maxalloy 5 (27% chrome hard iron)
Maxalloy 2 (chrome-moly hard iron)
White Iron
Nihard 4
Elastomers (Rubber) / Alloy steels
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Slurry Pump Model HD
Wilfley's
Model HD solids handling centrifugal pump is designed for abrasive
solids at high head applications found in aggregate, cement
or common industrial and mining applications.
Markets
Cement, aggregate
Industrial: potash, kaolin clays, sugar
Mineral processing: copper, iron ore, lead/zinc
Waste water: grit, lime, pH control
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Applications
Cyclone and screen feed
Cement kiln feed and transfer applications
Thickener under/over flow
Tailings
Transfer applications
Loading/unloading applications
Capacities
Sizes from 4x2 through 10x8 offering operating range coverage
of less than 50 GPM/2.2 m3/hr up to 6,000 GPM/910 m3/hr. Head
capabilities ranging up to 200 ft / 90 meters depending upon
pump size.
Materials of Construction
Maxalloy 5 (27% chrome hard iron)
Maxalloy 2 (chrome-moly hard iron)
Nihard 4
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| Chemical
Slurry Pumps |
| Chemical Slurry Pump Model S3 Wilfley's
Model S3 centrifugal pump is designed and constructed for
handling difficult combinations of corrosive liquids and abrasive
solids.
Markets
Fertilizer production: phosphoric acid
Industrial minerals: potash, kaolin clays, titanium dioxide
Mining
Power
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Applications
Ash handling
Cyclone feed
Thickener under/over flow
Tailings
Loading/unloading applications
Capacities
Sizes from 3x2-11, 4x3-11, 6x4-13 and
6x4-16 offer an operating range coverage of approximately
100 GPM/22 m3/hr up to 1,200 GPM/275 m3/hr. Head capabilities
ranging up to 250 ft/75 meters depending upon the model size.
Materials of Construction
WCD4 (Wilfley's proprietary hardened
CD4MCu)
Maxalloy 5 (27% chrome hard iron)
Maxalloy 8 (high chrome iron for low/high pH applications) |
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| Chemical
Pumps |
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Chemical Pump Model A7
Wilfley's Model A7 is a heavy-duty
chemical processing pump that exceeds the ASME B73.1 M-91 specifications.
It is designed for the most difficult applications, pumping
highly corrosive liquids and, in certain instances, liquids
containing solids.
Applications
Batching applications
Crystallizer recirculation/transfer
Evaporator recirculation/product transfer
Filter feed
Thickener under/over flow
Loading/unloading applications |
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Markets
Ammonium Nitrate
Caustic
Corn processing – starch
Hydrochloric acid
Kaolin clay
Lead/zinc
Molten sulfur
Milk of lime
Nitric acid
Phosphoric acid
Salt
Scrubber/contaminated liquids
Spent acids
Sugar
Sulfuric acid
Titanium dioxide
Urea melt
Waste fuels
Capacities
Sizes from 1.5x1-6 through 10x8-16 offering operating range
coverage of less than 10 GPM/2.2 m3/hr up to 4,000 GPM/910
m3/hr. Head capabilities ranging up to 600 ft/185 meters depending
upon pump size.
Materials of Construction
Alloy 20 / 904L
CD4 (CD4MCu)
WCD4 (350 BHN)
304L & 316L stainless alloys
Hastelloys B2, C, G30
Titanium
Maxalloy 5 (27% chrome hard iron)
Maxalloy 8 (high chrome iron for low/high pH applications)
Ductile iron
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Chemical Pump Model A7 NM
Wilfley's Model A7NM pump handles liquids
containing aggressive, highly corrosive chemicals such as hydrochloric
acid. Markets
Hydrochloric acid
Nitric acid
Phosphoric acid
Sulfuric acid
Applications
Pickling lines
Transfer applications
Loading/unloading applications |
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Capacities
Sizes from 1.5x1 through 6x5 offering operating range coverage
of less than 15 GPM/3.4 m3/hr up to 1000 GPM / 227 m3/hr.
Head capabilities ranging up to over 200 ft/90 meters depending
upon pump size.
Materials of Construction
W35
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