ROTAN Gear Pump Brochure_ English

G E A R E D T O
I N D I V I D U A L S O L U T I O N S
GP/HD/PD/CD/ED
DESMI ROTAN, one of the world’s
leading manufacturers of internal gear pumps
DESMI A/S, formerly known as A/S De Smithske, was
founded in 1834. Today DESMI A/S develops, manufactures and markets pumps and pumping systems
world-wide. The ROTAN pumps are marketed by the
DESMI ROTAN division and are distributed by subsidiaries, sales agencies and distributors in more than 40
countries.
The internal gear pump principle was developed in
1915 by a Danish American. In 1921, he licensed a
Danish company to manufacture the pumps, which
have been continuously marketed worldwide under
the ROTAN name. The unique, modular concept of
ROTAN pumps is generally recognized as the most
advanced internal gear pump design available today.
Product development with CAD
Main offices and factory in Aalborg
2
Pumps are marketed worldwide under the ROTAN name
The ROTAN internal gear pump provides favourable
flow conditions, as the direction of the liquid flow is
only changed slightly through the pump.
This means that superior self-priming capability and
gentle liquid handling are achieved, and also that
highly viscous liquids may be pumped.
Method of operation
Liquid inlet
Passage of liquid
Liquid outlet
Rotan pumps offer the following additional
advantages:
Each pump is tested using
modern facilities
ISO 9001 certificate
- Pumping in either direction
- Easy maintenance and inspection based on the
modular design
- Sturdy and uncomplicated construction with
only two rotating parts and one shaft seal
- Large choice of configurations available as
standard
- Genuine back pull-out design
Every ROTAN pump is hydrostatically and
performance tested and receives its own certificate
before leaving the factory.
It is DESMI ROTAN’s policy to offer solutions
tailored to our customers' needs and to follow-up by
first-class after-sales service.
Manufacturing with state-of-the-art CNC equipment
3
GP
General Purpose pumps in cast iron,
for clean, non-abrasive liquids
GP monobloc pumps are
typically used for handling clean oils.
The simple and compact construction makes it a
low-cost pump, often used in modified versions by
OEM customers.
A close-coupled OEM model is also available
(see picture below).
GP pumps are designed for use with IEC flange
motors.
Capacity range:
Speed:
Differential pressure:
Suction lift:
Viscosity range:
Temperature:
4
Up to 50 m3/h
Up to 1,750 rpm
Up to 16 bar
Up to 0.5 bar vacuum
while priming
Up to 0.8 bar vacuum
while pumping
Up to 7,500 cSt
Up to 150˚C
HD
Heavy Duty pumps in cast iron, for a wide
range of viscous, non-corrosive liquids
HD pumps are specifically designed for
difficult applications and those involving high
viscosity liquids.
Typical applications include pumping of oil, asphalt,
chocolate, paint, lacquer, molasses, soap and other
industrial viscous process fluids.
HD pumps are known by their sturdy and simple
construction.
Capacity range:
Speed:
Differential pressure :
Suction lift:
Viscosity range:
Temperature:
Up to 170 m3/h
Up to 1,750 rpm
Up to 16 bar
Up to 0.5 bar vacuum
while priming
Up to 0.8 bar vacuum
while pumping
Up to 250,000 cSt
Up to 250˚C
5
PD
Petrochemical Duty pumps in carbon steel, designed
for refinery and petrochemical applications
PD pumps are designed for refinery and
petrochemical applications, all pressure containing
components are carbon steel.
Typical applications include pumping of fuel, oil,
gasoline, lube oil, grease, and other hydrocarbonbased fluids. PD pumps are available to meet
API 676 standards with exceptions.
Capacity range:
Speed:
Differential pressure :
Suction lift:
Viscosity range:
Temperature:
6
Up to 170 m3/h
Up to 1,750 rpm
Up to 16 bar
Up to 0.5 bar vacuum
while priming
Up to 0.8 bar vacuum
while pumping
Up to 250,000 cSt
Up to 250˚C
CD
Chemical Duty pumps in stainless steel,
designed to handle corrosive liquids
CD pumps are designed for handling
corrosive liquids, primarily found in the chemical
processing, food and pharmaceutical industries.
Typical applications include pumping of organic
acid, fatty acid, alkali, caustic soda, polymer
solutions, soap, shampoo, animal fat, vegetable fat,
chocolate, and other special fluids.
Capacity range:
Speed:
Differential pressure:
Suction lift:
Viscosity range:
Temperature:
Up to 170 m3/h
Up to 1,750 rpm
Up to 16 bar
Up to 0.5 bar vacuum
while priming
Up to 0.8 bar vacuum
while pumping
Up to 250,000 cSt
Up to 250°C
7
ED
Environmental Duty pumps, magnetically coupled pumps
for ultimate protection against leakage
ED pumps are designed for applications where no
leakage, liquid or gaseous, is allowed.
Earlier the fields of application for the ED pump
were typically isocyanate, solvents and other hazardous organic liquids.
Nowadays ED pumps are increasingly used for not
hazardous liquids as well, since leakage/pollution
becomes more and more unacceptable.
As only minimal maintenance is necessary, ED pumps
will be a very economical solution compared to traditional pumps where frequent shaft seal replacements are required.
Construction materials:
Capacity:
Speed:
Differential pressure:
Suction lift:
Viscosity:
Temperature:
8
Cast iron, carbon steel
or stainless steel
Up to 90 m3/h
Up to 1,750 rpm
Up to 16 bar
Up to 0.5 bar vacuum
while priming
Up to 0.8 bar vacuum
while pumping
Up to 10,000 cSt
Up to 250˚C
Most important features and benefits
- Maximum protection against leakage
- Patented cooling system, based on an integral
pump, eliminating the need for external cooling
(see picture below)
- Dynamic axial balancing system, minimizing
axial loads, saving energy and increasing life
(see picture below)
- Increased safety, provided by a completely
enclosed magnetic coupling housing
- Optimal for outdoor installation, the completely
enclosed magnetic coupling housing protects the
external magnets from contact with moisture and
foreign matters.
- Large choice of slide bearing materials available
as standard, e.g. cast iron, bronze, carbon and,
tungsten carbide
- Standard magnet material is neodymium-iron-boron.
Optional samarium cobalt permanent magnets
permit operating temperatures up to 250°C
- Pumping in either direction
- External heating jackets for both front cover and
magnetic coupling housing available as standard
optional features
- Genuine back-pullout design
- Standard as close-coupled, optional with bare
shaft end
Suction
(Discharge)
- Both internal and external canister protection
Discharge
(Suction)
ROTAN ED SERIES PUMP
The most advanced, magnetically driven, positive
displacement pump available
9
By indicating the options
in the order below, the complete
pump can be identified
1) Pump series
GP
HD
PD
CD
ED
6) Lubrication
General Purpose, monobloc pump in cast iron
Heavy Duty pump in cast iron
Petrochemical Duty pump in carbon steel
Chemical Duty pump in stainless steel
Environmental Duty pump, magnetically coupled,
cast iron, carbon steel or stainless steel
2) Pump sizes
26
33
41
51
66
81
101
126
151
152
201
DN 25 – 1”
DN 32 – 11/4”
DN 40 – 11/2”
DN 50 – 2”
DN 65 – 21/2”
DN 80 – 3”
DN100 – 4”
DN125 – 5”
DN150 – 6”
DN150 – 6” *
DN200– 8” *
* Under development
ANSI B 16.1/B 16.5
Suction/discharge connections in-line
Suction/discharge connections at 90° angle (not standard)
Additional options, see page 12.
1
3
4
Rotor/Idler
Shaft
GP/HD GG-25
GG-25
St.60.2
CD
G-X 6 CrNiMo 18 10
X 8 CrNiMo 27 5
X 8 CrNiMo 27 5
PD
GS-52.3
GG-25
St.60.2
For ED pumps, all material codes may be used.
10
Idler Pin: CD
Hardened 16 MnCr 5
Hardened 16 MnCr 5
Hardened 16 MnCr 5
Coated 16 MnCr 5
X 8 CrNiMo 27 5
X 8 CrNiMo 27 5
X 8 CrNiMo 27 5
Coated
X 8 CrNiMo 27 5
Al.oxide, polished
Tungsten carbide
Cast iron
Bronze
Carbon
Al.oxide
5
8
Carbon
Al.oxide, polished
Tungsten carbide Tungsten carbide
Shaft: GP - HD - PD
Shaft: CD
St.60.2
St.60.2
St.60.2
Coated St.60.2
X 8 CrNiMo 27 5
X 8 CrNiMo 27 5
X 8 CrNiMo 27 5
Coated
X 8 CrNiMo 27 5
Coated
X 8 CrNiMo 27 5
Not applicable
1
2
3
4
Cast iron
Bronze
Carbon
Al.oxide
8
Tungsten carbide Coated St.60.2
B
Ball bearing
St.60.2
B
2
Teflon-impregnated, non-asbestos packing
Single mechanical shaft seal, DIN 24960 - KU,
bellows type or O-ring type
Double mechanical shaft seal,
DIN 24960 - KU, O-ring type
For ED pumps only
5) Material codes for main parts
Casing/Covers
Idler Pin: GP-HD-PD
1
2
3
4
22
Hyphen
Code Type
Code Idler Bush
9) Shaft seals
3) Configurations
–
7) Material codes for idler bearing
Code Bearing Bush
** Flange connections according to:
ISO 2084 DIN 2501 BS 4504 1969
4)
Idler bearing and main bearing lubricated by pump medium
Externally lubricated idler bearing and main bearing
8) Material codes for main bearing
Available with flanges** or female connections, dependent on
size and material. GP pumps are available up to and including
size 101, PD is not available in size 152. ED pumps are available up
to size 151.
E
B
U
M
/xx
N
C
Magnet length: xx cm
Magnet material: Neodymium-iron-boron
Magnet material: Samarium cobalt
10) Special configurations
S
All special configurations are marked with: S
Item references and descriptions
BV Shaft
CR Bearing cover
CU Ball bearing
CS Bearing cover
CY Flange
CQ Bearing bracket
BN Shaft seal housing
BP Shaft seal housing
CJ Shaft seal
BC Main bearing bush
BA Rear cover
BU Rotor
AB Idler
AD Idler bush
S Blind cover
AC Idler pin
AA Front cover
A Pump casing
11
Configurations
Sealing with stuffing box, with or without lantern
ring, for use of external lubrication. Used for high
viscosities and where some leakage is allowed.
M - GP/HD
Sealing with single mechanical shaft seal, DIN 24960
- KU, combined with a ball bearing as main bearing. Used where only minor leakage is allowed.
M - PD/CD
Sealing with single mechanical shaft seal, DIN
24960 - KU, combined with a product lubricated
sleeve bearing as the main bearing. Used where
only minor leakage is allowed.
MM (tandem) - MMP (back-to-back)
Double mechanical shaft seals, DIN 24960 - KU, in
tandem or back-to-back, with main bearing in the
barrier fluid. Used where no leakage is allowed. Up
to 6 bar differential pressure.
MMW (tandem) - MMPW (back-to-back)
Double mechanical shaft seals, DIN 24960 - KU, in
tandem or back-to-back, with product lubricated
main bearing. Used where no leakage is allowed.
Up to 16 bars differential pressure.
T
Special clearances. Increase of tolerances used for
liquids with a viscosity above 7,500 cSt. or a
temperature above 150˚C.
D
Heating jacket on the front cover, often required
prior to start-up when pumping high viscosity
liquids and liquids which tend to solidify.
K
Heating jacket on the rear cover, often required prior to start-up when pumping high viscosity
liquids and liquids which tend to solidify. This
jacket is also used as a seal cooling jacket.
CHD
Combination of special clearances and heating
jackets together with external lubrication of the
main bearing, used in the chocolate industry.
R
Safety valve, single acting (one direction), used to
protect the pump and the complete installation
against excess pressures.
Special configurations
Example: Customer specified or provided
cartridge seal or component.
Lubrication
Idler and main bearing externally lubricated. Used
when pumping non-lubricating or very viscous
fluids.
12
Selection of pump size
VISCOSITY (cSt)
50,000 25,000
3,000
400 & below
75,000 40,000
7,500
1,000
150
100
90
80
70
60
50
40
30
201
20
152
5
126
4
3
101
2
81
1
0.9
0.8
0.7
0.6
66
0.5
51
0.4
0.3
41
33
0.2
26
0.1
40
60
80 100
150
200
300
400
SPEED (rpm)
600
800 1,000 1,500
1750
CAPACITY (m3/h)
10
9
8
7
6
151
To select the pump size with this table, you
only need to know:
– Capacity
– Viscosity
Start at the top of the table with the
viscosity, and draw a line down, staying
within the colour of the selected viscosity
range (see example).
Start at the right of the table, draw a horizontal line starting with the required capacity (see
example).
The point where these two lines meet
determines the pump size, defined by the diagonal lines in the table. If you do not hit one
of these pump lines exactly, increase or
decrease the capacity a bit. The speed is
found vertically below the point of intersection (see example).
The maximum speed of each pump is found
vertically below the end of each pump line
(indicated with the small black dot). This
maximum speed must be reduced to max.
50% when pumping strongly abrasive liquids
or emulsions. When the differential pressure
is known, the shaft power is calculated as
follows:
E(kW) = 0.07 x flow (m3/h) x differential
pressure (bar)
The requested shaft power has to be
increased by up to 35% when using a small
ROTAN pump in combination with high
viscosity. (More than 10,000 cSt).
The requested shaft power has to be
decreased by up to 35% when using a big
ROTAN pump in combination with low viscosity. (Less than 500 cSt).
DESMI A/S
Tagholm 1, Postboks 226
DK-9400 Nørresundby
Tel.:
+45 96 32 81 11
Fax.:
+45 96 32 81 49
Internet: www.desmi.com
E-mail: [email protected]
Prinfo Aalborg - Handelstrykkeriet - 05/2003
THE DESMI GROUP