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Commercial Pump
Specification Tools
Taco Flanges
• All casings available with Class 125 flanges or Class 250 flanges
Heavier Construction / Durability
Taco Casting = 76 lb B&G Casting = 64 lbTaco FI2510 B&G 2½ BB
Superior Wall ThicknessAll Taco volutes are cast to a thickness required for 250psi working
pressure
Taco FI2510 B&G 2½ BB
Additional Casing FeaturesALL models are
Flanged
Anti-rotational vane
Drain
Externally Flushed SealWe have the ability to externally flush our seal
Taco provides standard seal
flush tap
External Flush
• We have given the commercial sector the ability to adopt the best maintenance practices used in critical municipal applications.
Externally Flushed Seal
B&G Cover Untapped
B&G does NOT provide standard seal flush taps.
Cover NOT tapped.
B&G 2½ BB Cover
All casings / volutes are tapped for gauges and flush lines
Standard Tappings
Tappings
All casings / volutes are tapped for gauge installation
Standard Gauge Tappings
Overhanging tangential discharge volutes are less desirable because they incur both bending & torsion stresses
Competition uses overhanging tangential discharge
All Taco FI volutes are centerline discharge
Centerline discharge evenly distributes the
piping loads to the base
Piping Load
Centerline DischargeCenterline geometry does not trap air
• Better suited to support inevitable piping loads associated with improper installation
Piping Load
Foot
Foot Mounted Volutes
• Taco foot mounted volutes with feet positioned directly below the pipe flange provide better support
Lost Foam Impellers• Tools are made of aluminum• No tool wear when injecting foam• Each piece is dimensionally identical
Lost Foam ImpellersFoam impellers prior to casting
Dip foam in clay slurry…
Lost Foam Process
….and let dry
• Lost foam is precision investment casting process
• Foam is vaporized and replaced by molten bronze
Lost Foam Impellers
• Advantages:– Superior surface quality creating smoother passageways
– Higher efficiencies & hydraulic performance
– Repeatability
• No tooling wear
Lost Foam Impellers
Sand Cast Impellers• Competitors use a sand casting process• Over time, sand packing abrades and degrades patterns• “This is like making a copy of a copy of a copy indefinitely.”
• The difference…
Lost Foam Impellers
Lost Foam
Domestic Sand Cast
• The difference…
Lost Foam Impellers
Lost FoamOffshore Sand
Cast
Dry Shaft Design
Taco FI2510 bearing assembly with impeller and cut-away cover
• Benefits:– More reliable by preventing shaft corrosion
– Easier to service
• Sleeve slides on with no additional tools required.
• Competition’s press/shrunk/glue-on sleeves difficult to replace
Dry Shaft Design
Impeller
Slip-on Shaft Sleeve
Stationary Seat
Cover
Rotating Element
Dry Shaft Design
Pump Shaft
Seal Components
Slip-on Shaft Sleeve
Rotating Element
Stationary Seat
Sleeve O-Ring
Carbon rotating element (shiny black)
Forms seal against the stationary ceramic seat
mounted in cover
EPT O-ring inserted into shaft
sleeve
EPT bellows forms tight seal between
rotating element and bronze sleeve.
Dry Shaft Design
Retainer & spring are 316 SS
Bronze Sleeve
ASTM B584-932
SAE660
Stationary Seat
Pump Shaft
Dry Shaft Design
Cover
EPT Elastomer
Cup
Ceramic Seat
Dry Shaft Design
O-Ring creates seal against back of impeller
Pump shaft
Dry Shaft Design
Back of impeller is sealed against
shaft sleeve o-ring
Impeller Cover
Dry Shaft Design
EPT O-ring Impeller machined sealing surface
Impeller washer
Impeller bolt
Dowdy washer provides tight seal between impeller
washer & bolt
Impeller washer o-ring forms tight seal on smooth machined surface on front of impeller
Impeller washer
Dowdy Washer w/
EPT Elastomer
B&G Shaft SleevePermanently affixed shaft sleeve
makes maintenance difficult
• B&G utilizes glue
• Armstrong utilizes shrink fit
B&G 2½ BB Bearing Frame
• All pumps should have a drain pan per best practices
• Moisture buildup– Seal leaks – Chilled water pump sweating
• .1875 Thick Steel
Factory Installed Drain Pan
Superior Base
Taco FI2510 Base
B&G 2½ BB Base
Superior Base
Taco
FI2510 Base
B&G
2½ BB Base
Heavier Casting
Superior Bearing Frame
Taco FI2510 Casting
24.3 lbB&G 2½ BB Casting
12.5 lb
Larger shaft and larger maintenance free bearings
Superior Shaft
Taco FI2510 Shaft
13.1 lb
B&G 2½ BB Shaft
4.35 lb
Note: Sleeve could not be removed
• All bearing frames come standard with Forsheda seals– Protects the bearings from external moisture and airborne contaminants.
– None of the competitors do this.
Forsheda Seals
Forsheda Seals
• Woods Dura-Flex Couplings standard
– Ideal for all applications– Superior for variable speed
applications
• Competitor– Not desirable for all applications– In variable speed applications,
constant loading & unloading of coupling causes rubber insert to vibrate & wear, resulting in premature failure
Pump Couplings
• Minimize the need to EVER service the pump
Taco Design Philosophy
– Resulting in a minimum number of seals and bearings throughout the entire product line
– Owners spend significantly less maintenance dollars– Owners use less storage space
B&G PhilosophyWhat happens when you don’t use a minimum number of seals and bearings?
Requires more space
Increases storage costs
Requires owner to stock MORE replacement parts
Taco pumps require minimal replacement parts
These gaskets, seals & bearings cover the entire line of Taco pumps!!
Taco Parts Philosophy
• Majority of pump UNITS shipped are smaller inline pumps
Overview of Industry
• Overall, our industry does not offer the end user a robust, simple inline pump
• Majority of maintenance hours are spent on smaller pumps
• Majority of maintenance dollars are spent on larger pumps
• Most manufacturers want to maximize their profit opportunity on the installed base of their products (All pumps, small to large)– They try to do this in 2 ways:
• Use a design that inherently requires service
• Use a part numbering system that implies you need a unique new part # (SKU) for each model of pump you own
Pump Maintenance Issues
• Taco’s entire product line addresses ALL of these points– i.e. 1600 & 00 offering vs. B&G Series 60
KS Seal
Outside Seal
Inside Seal
• TACO provides support for alternative layouts with Taco products
Defensive strategy for VSC