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Self-Priming Magnetic Drive Pumps - DB / SP Series Brochure
Supreme Efficiency,
Reliability and Performance
The DB Series magnetic drive pump is the new stan-
dard for hydraulic efficiency and corrosive fluid handling.
With design-aided magnetic flux and computational
fluid dynamics technology, the DB Series packs all the
high-pressure, fluid-handling punch you would expect
from a Finish Thompson pump.
Born from painstaking, extensive R & D effort, the ef-
ficiency of the DB Series lowers energy consumption
and operating costs over the long life cycle of the pump.
Constructed from Polypropylene or PVDF, the DB Series
operates durably in the most corrosive of environments.
It can even run dry without damage.
This rock solid embodiment of technological advance-
ment is superior in precision, performance and reliabil-
ity to other pumps on the market.
That’s why we offer the industry’s best five-year warranty.
And why everyone else is undoubtedly heading back to
the drawing board.
The SP Series
- Self Priming -
Big on power, yet short on energy consumption, the SP
Series from Finish Thompson is one of the most ver-
satile -- and economical -- centrifugal pumps on the
market.
Backed by an industry best five-year warranty, it is per-
fect for applications difficult for ordinary centrifugal
pumps, such as pumping fluid from below grade, emp-
tying tanker trucks or rail cars, transferring fluids from
the top of tall bulk storage tanks to reduce the possibil-
ity of leaks from sidewall-mounted bulkhead fittings,
overcoming piping systems that tend to have trapped
or entrained air, or when optimum run-dry protection
is needed.
The exclusive SP Series combines deep-lift capabilities
(up to 25 feet/7.6 meters) and lightning-fast priming
(18 feet/5.5 meters in 90 seconds) with the advan-
tages of magnetic drive technology--ensuring ease of
operation with no seal replacement, no leaks and the
capability to run dry without damage.
Its innovative design and corrosion-resistant materials
make the SP Series ideal for handling even the most
difficult applications.
The DB Series
- Flooded Suction -
DB Series SP Series
Features
+ Close-coupled design
+ Polypropylene or PVDF
construction
+ Replaceable shaft
+ ISO 1940 G2.5 balancing
+ Mounts to NEMA and IEC
motor frames
+ Mounts to motor without
disassembly
+ Back pullout design
+ Five-year warranty
+ CE certified
+ ATEX available (DB only)
Industries &
Applications
+ Chemical manufacturing
+ Metal plating/working
+ Wastewater treatment
+ Fume scrubbing
+ Mining
+ Paper mills
+ Printing
+ Pharmaceutical processing
+ Agriculture
+ OEM equipment supply
+ General pump applications
SP Series:
+ Sumps
+ Underground storage tanks
+ Rail and tanker cars
+ Over-the-wall applications
+ Tanks with an opening on top
+ Piping systems that tend to
have trapped or entrained air
** Lift determined on fresh, cold water.
*** With maximum diameter impeller.
DB / SP Series Technical Specifications
Capabilities
+ Up to 70% operating efficiency
+ High working pressure up
to 90 psi
+ High specific gravity handling --
over 1.8*
+ Maximum viscosity:
DB - 150 cP
SP - 50 cP
+ Maximum Temperature:
Polypropylene - 180º F (82º C)
PVDF - 220º F (104º C)
SP Series Specific
Capabilities
+ SP retains fluid for re-priming when
shut off without a check valve
+ SP lifts up to 25 feet (7.6 meters)**
+ SP primes up to 18 feet (5.5 me-
ters) in 90 seconds***
* Specific gravity affects lift capability. Di-
vide 25 feet (7.6 meters) by the specific
gravity to determine maximum lift. NOTE: SP Series is not recommended
for pumping flammable liquids.
Engineered by computational fluid dynamics & Finite Element Analysis
7. Run Dry System/Magnet
Technology
The DB and SP can run dry for hours with-
out damage when equipped with a chemi-
cal grade carbon bushing
1. Thermoplastic Casing
Produces equivalent pump performance at both 60 Hz
and 50 Hz operation. SP casing functions as a fluid res-
ervoir featuring a molded-in “gooseneck” suction passage
eliminating the need for internal check valves.
6. Impeller
Two-piece impeller design allows impeller to
be changed without having to replace inner
drive.
3. Multiple Connections
NPT or BSP threaded, raised-face adjustable flanges, or
union connections
Neodymium magnets are the most powerful
and efficient magnets available. Inner mag-
nets are completely encapsulated in unfilled
polypropylene or PVDF to prevent corrosion of
the magnets.
8. Easy Set Outer Drive
Measurement-free outer drive
ensures optimum magnet alignment
and easy motor installation.
DB & SP PREmIum FEATuRES
2. O-ring
On SP models, creates airtight seal between the inner
volute and “gooseneck” suction passage. Helps maintain
vacuum required for proper priming.
4. Separator Plate
Allows liquid to flow to the impeller and discharge the
air/liquid mixture created during priming back into the
fluid reservoir. (SP only)
5. Inner Volute
Allows air to be efficiently removed from the suction pas-
sages for fast priming. (SP only)
DB Series
SP Series
SP PrinciPleS of Self-Priming
1
3
2
4
1 During pump installation, the
priming housing is filled through
the fill port.
2 As priming begins, air in the
suction piping mixed with liquid in
the priming chamber forms a vacuum
in the inner volute. As they separate,
the air rises out of the discharge
piping while the liquid returns to
the priming chamber.
3 The circulation process continues
until liquid replaces all the air in
the suction piping, beginning the
pumping process.
4 When the pump is shut off, the
priming chamber’s gooseneck design
ensures that enough liquid is retained
for efficient re-priming.
1 Transfer from top of rail cars or tanker
trucks to bulk storage.
2 Transfer from bulk storage to process
or day tanks.
3 Pump from underground sumps or pits
to treatment tanks.
4 Pump from underground storage tanks
to process or day tanks.
SP APPlicAtionS
0
20
40
60
80
100
120
140
160
180
200
220
0 25 50 75 100 125 150 175 200 225 250
US gpm [M3/hr]
DB SeriesDB Series
H
E
A
D
-
F
ee
t
[M
et
er
s]
H
E
A
D
-
F
ee
t
[M
et
er
s]
3450/2900 rpm3450/2900 rpm
[67]
275
[62.5]
FLOW -
DB6 -10
DB11
DB15
DB22 Closed*
DB22 Open
[5.7] [11.4] [17] [22.7] [28.4] [34.1] [39.7] [45.4] [51.1] [56.8]
[48.8]
[42.7]
[36.6]
[30.5]
[24.4]
[18.3]
[12.2]
[6.1]
[54.8]
[60.9]
DB3-5
0
20
40
60
80
100
120
140
160
180
200
220
0 25 50 75 100 125 150 175 200 225 250
US gpm [M3/hr]
SP SeriesSP Series
FLOW -
H
E
A
D
-
F
ee
t
[M
et
er
s]
H
E
A
D
-
F
ee
t
[M
et
er
s]
3450/2900 rpm3450/2900 rpm
[67]
275
SP15
SP11
SP22
[5.7] [11.4] [17] [22.7] [28.4] [34.1] [39.7] [45.4] [51.1] [56.8]
[48.8]
[42.7]
[36.6]
[30.5]
[24.4]
[18.3]
[12.2]
[6.1]
[54.8]
[60.9]
[62.5]
SP10
Note: SP curves based on flooded suction. Contact the factory or download the curve book for performance at various lifts.
Note: Contact the factory or download the curve book for DB22 closed impeller performance at 2900 rpm.
DB / SP mATERIAlS oF ConSTRuCTIon
Item Description Polypropylene Models PVDF Models
1, 2, 3, 15, 16
Housing, impeller, barrier,
separator plate, inner volute
Glass-fiber reinforced
polypropylene
Carbon-fiber reinforced
PVDF
4
Housing thrust ring, inner
volute thrust ring
High-purity alumina ceramic, silicon carbide
5 Barrier thrust ring High-purity alumina ceramic
6 Impeller thrust ring Molybdenum disulfide filled PTFE, silicon carbide
7 Inner drive magnet
Neodymium iron boron mag-
nets encapsulated in unfilled
polypropylene
Neodymium iron boron
magnets encapsulated in
unfilled PVDF
8 Outer drive magnet Nickel-plated neodymium iron boron magnets / steel
9 Bushing Carbon, PTFE, high purity alumina ceramic, silicon carbide
10 Shaft High purity alumina ceramic, Hastelloy C, silicon carbide
11, 12, 13 O-ring FKM, EPDM (Simriz®, Kalrez® - DB only)
14 Motor adapter Glass-fiber reinforced polypropylene and/or ductile iron
17 Fill/drain plugs (SP only) Polypropylene PVDF
15
12
16
7 9
13
17
2
6
14
4
8
5
10
3
*Fill plug not shown
7 9 10
14
8
4
6
2
3 5
1
11
11
DB Series SP Series
Kalrez® is a registered trademark of DuPont Performance Elastomers
Simriz® Perfluoroelastomer is a registered trademark of the Simrit® division of Freudenberg-NOK
Hastelloy® C is a registered trademark of Haynes International, Inc.
1
NOTE: The foot is offered only on the DB 11 & 15 and the SP 11 & 15 models
Mechanical Sealed PumpsDrum / Barrel Pumps
FT10-1120A
ETFE-Lined Cast Ductile Iron Pumps
VISIT FTI’S ONLINE PUMP SELECTORS:
www.finishthompson.com
Other great products from Finish Thompson....
Finish Thompson Inc.
is a designer and manufacturer of premium
pumps for safe and reliable industrial fluid handling.
All products are manufactured on site in Erie,
Pennsylvania, U.S.A. and sold worldwide through
an international network of stocking distributors.
Established in 1951 as a designer and builder of
custom decorating equipment, Finish Thompson
has evolved as a primary supplier of chemical
transfer pumps for corrosive duty environments
and as an industry leader in the design and engineer-
ing of magnetic drive centrifugal pumps.
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