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SC and TP Series: Process-engineered Centriugal Compressors
Atlas Copco Gas and Process
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Publication Data
Gas and Process Division
Atlas Copco Energas GmbH
Am Ziegeloen 2
50999 Cologne
Germany
Phone: +49 (0) 2236 9650 – 0
Teleax: +49 (0) 2236 9650 – 899
atlascopco.energas@de.atlascopco.com
www.atlascopco-gap.com
Editor-in-Chie: Petra Jacob
Phone: +49 (0) 2236 9650 –750
Published by Threeview GmbH or Atlas Copco Energas GmbH.
Additional photography credits: Hansi Herbig, Munich
Illustrations: Andrew Irving, Munich
Printed in Germany – 2008
© Atlas Copco Gas and Process Division.
All data are without warranty. No guarantee is given or the correctness o the inormation contained in this newsletter.
Articles may be reprinted ree o charge on condition that a copy o the publication is orwarded to and approved by the publisher
(Atlas Copco Energas GmbH). Reproduction o photographs only with written agreement o the communications agency/publisher.
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Table o Contents
Overview
Advancing Compressor Technology 4
Your Application
Fuel Gas Boosting Applications 6
Oxygen Service Applications 8
Hydrocarbon Applications 9
Technical Features
Innovations For Your Superior Productivity 10
Seal System Options 14
Twin-pinion Gearbox Conguration 16
Three-pinion Gearbox Conguration 17
Operating Control System 28
Capacity Control Options 29
Quality Management
API Options 20
Quality Standards 21
Products and Applications at a Glance
SC/TP 22
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4
Overview
With more than 125 years o interaction with customers
engaged in a broad range o processes, we’ve learned
the importance o meeting the unique requirements each
industry segment demands o our compressors and our
services. That’s why we build a close relationship with
each customer – to better understand their processes,
their turbomachinery applications and how we can bestserve their needs.
We know that process industries require machines to
API specications plus rigorous testing and documenta-
tion. Customized Atlas Copco process compressors are
uniquely capable o meeting all o your requirements,
including packaging with application-specic accessory
systems.
Advancing Compressor Technology
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To ensure that each compressor is exactly right or the job,
we’ve assembled dedicated application/engineering
management teams with specialized experience in key
industries. For applications in the petrochemical, chemical,
and oil and gas industries, our API team will prepare
quotes and manage the project through assembly, test and
commissioning o your compressor to API standards.
In all types o process applications, Atlas Copco engineers
have clearly demonstrated that our integrally geared cen-
triugal compressors are very competitive in range and
perormance when we work closely with a customer on
the proper scope o supply and when the long-term
benets o high-quality equipment are considered.
At a Glance:
SC/TP-Series compressors are engineered or your
toughest process applications.
Here’s an overview o our SC/TP-Series
compressor technology:
With our technology, we serve the petrochemical,•
chemical, and oil and gas industries, among others
Oered in various congurations, meeting numerous•
and very specic needs
Developed and advanced by the world’s number-one•
company or integral-gear technology
Dedicated to boosting your productivity•
Thousands o reerences worldwide•
Process application
capabilities include:
Hydrocarbon processes•
Hydrogen compression•
Oil and gas processing•
Fuel gas boosting•
Pulp and paper manuacturing•
Desulphurization•
Oxygen production•
Air separation•
Petroleum rening•
Wastewater treatment•
Power generation•
Food processing•
Pharmaceutical manuacturing•
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Your Application – Fuel Gas Boosting Applications
Centrifugal gas compressor for fuel gas boosting
“Complete on-skid packaging o uel gas
boosting compressors and ancillaryequipment reduces costs.”
When you speciy Atlas Copco integrally geared centriugal
compressors or uel gas boosting, you eliminate the
elaborate and costly system congurations and
oundations that are typically required by reci-
procating compressor systems. The compact
package includes the inlet gas separator, com-
pressor, drive motor, scrubber and PLC controls
installed and completely piped on a single
column-mounted or slab-mounted skid. There is no
pulsation, so maintenance is minimized.
Since they are inherently oil ree, integrally geared
centriugal compressors eliminate the risk o oilcontaminating the uel gas. There is no need or
downstream ltration as would be required by
lubricated compressors.
Dry-gas Sealing System
Atlas Copco dynamic dry-gas seals are especially well
suited to uel gas applications, since they minimize
leakage and ensure positive sealing at shut-down. They
utilize a ltered process gas buer support system. Seals
can be applied in single, double or tandem congurations.
Fuel Gas Boosting Applications
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Your Application – Oxygen Service Applications
Oxygen Service Applications
Atlas Copco meets the specialized requirements o oxygen compression or both internal and external
processes. In either application, special seals, shrouds
and liner materials, as well as other materials, are used
to ensure sae operation. Optimum purity o the gas
stream is maintained because the integrally geared
centriugal compressors are inherently oil ree.
Availability o higher pressure and fow ranges and fow
ranges has made the SC/TP-Series popular or oxygen
applications in the chemical industry, reneries
and steel production. Lower initial purchase cost,
lower installation costs, smaller ootprint and
lower maintenance costs have made thesemachines the ideal choice or oxygen service.
Atlas Copco engineers have extensive experience
with high-pressure oxygen that requires maximum
cleanliness and saety.
“Atlas Copco leads the industry in experience
with centriugal compressor designsor oxygen service.”
6-port buffered labyrinth sea
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Your Application – Hydrocarbon Applications
Hydrocarbon Applications
Compression o hydrocarbon gases has similar character-
istics as the oxygen service and requires the use o
buered labyrinth seals or dry-gas seals to ensure a sae,
oil-ree process operation.
Integrally geared centriugal compressors have demon-
strated signicantly lower initial capital cost or
hydrocarbon applications when compared to
single-shat compressors. Long-term operating
and maintenance costs are also signicantly lower.
Dry-gas Seal Support System
The compact, on-base dry-gas seal support system
is typically installed outboard o the compressor
base rame where it can be easily accessed or
maintenance.
“Our expertise with high pressure/hazardous
processes benefts your hydrocarbon applications.”
TP 6/6 two-stage compressor
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Technical Features
Application-specifc compressor
case selections
Compressor casings oered include cast scroll, olded
volute and case or abricated plenum congurations.
The design o the inlet section o each casing makes it
easy and inexpensive to adjust working clearances or
reliable operation in severe-duty applications.
Compressor case materials are designed based on the gas
to be handled as well as the operating pressure. Casings
can be cast rom nodular iron, steel and stainless steel.
Fabricated casings can be supplied or lower operating
pressures. All casings are hydrostatic tested to 150% o
the maximum working pressure.
Innovations For Your Superior Productivity
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90º
100
100
45º
70º
50º
% RELATIVE FLOW
% R
E L A T I V E H E A D
Confgurations accommodate
piping requirements
SC/TP-Series compressors are custom built or the
characteristics o your specic process by combining
eld-proven components. This ensures mechanical
integrity and permits more ecient packaging. The
compressor, driver, lubrication system, controls and
instrumentation are completely actory packaged on a
common base. Connection o utilities and system
piping is normally all that is required to complete
installation at your site.
Precision-balanced rotor assembly
or smooth operation
SC/TP-Series rotor assemblies combine precisely matched
and balanced pinion shat, high-speed gear and impeller.
Impellers are selected rom standard geometrically
similar impeller groups with unique fow coecients
to meet the dierent requirements o the compressor
fow range. Impeller geometries have been thoroughly
tested by Atlas Copco R&D and proven by practical
application experience.
The unique Atlas Copco impeller design combines good
turndown capability with high head and eciency. Eachimpeller will have a basic operating characteristic as
shown in the graph.
Each impeller is dynamically balanced and overspeed
tested beore assembly. Dynamic balance o the complete
rotor assembly is checked ater all components are
assembled to the shat.
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Technical Features
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Horizontally split gearbox acilitates inspection and maintenance
o gearing and horizontally split seals and bearings.
Optional adjustable inlet guide vanes
provide ecient control at a constant
speed over a broad capacity range.
High-perormance impellers conorm to
your fow and pressure requirements.
Open backward-leaning blade designs
provide maximum eciency.
Extensive shat seal selection enables the one best
solution or your specic process application.
Low-speed coupling. (High-speed coupling not required.)
Casing material appropriate or your process
gas requirements.
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Technical Features
Labyrinth seals
Used when leakage o process gas
into the atmosphere can be tolerated.
The number o labyrinths used and
clearances are determined by the
application.
Labyrinths can be combined with
multiple chambers to allow injection
o a buer gas or more positive seal-
ing. The easily replaced labyrinths
are made o light metal, brass or
other corrosion-resistant material
and installed on the shat sleeve.
Dynamic dry-gas seals
Minimize leakage and ensure positive
sealing at shut-down. They eliminate
oil-lm seals and expensive seal
support systems. Seals can be
applied in single, double or tandem
congurations. They are recommened
when leakage can be hazardous and/or
costly, and when no buer gas sys-
tem is available.
Seal System Options
The right seals minimize leakage to your process.
Buer gas injection
Floating oil seal
Carbon ring
Seal cartridge
Vent, Flare, ect.
Bearing
Floating oil seal Oil drain
Oil drain
Vent to atmosphere
Bearing
Ventinlet, ect
Matingring
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For oxygen service
Six-port buered labyrinth seals are
used. Monel shat sleeves and bronze-
coated silver mating ring are used
with a compatible buer gas.
During operation, pure oxygen is
vented to the compressor inlet rom
the rst chamber. Buer gas and a
small portion o oxygen are vented to
a sae area rom the second chamber.
Buer gas is introduced at the third
chamber, and the ourth chamber
vents the buer gas to atmosphere.
The last chamber is an atmospheric
opening only. Chambers one and our
are controlled by pressure dierential
transmitters to ensure proper direc-tional fow through the seal.
Floating carbon ring seals
Used or minimum leakage applica-
tions, they can be combined with two
or three chambers and can operate
dry or buered with gas.
Vent or buered port
Floating oil seal
Vent
VentRegulated buer gas
Atmosphericopening
Bearing
Vent to compressor inlet
Oil drain to reservoirOil seals
Vent, Flare, ect.
Bearing
Carbonring sealcartridge
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Technical Features
Second stage
First stageFixed diusers
Single helical integral gearing counterbal-
ances aerodynamic thrust load. Gears are
designed by Atlas Copco and manuactured
to meet AGMA Q-13 (DIN 5/6) specications.
Groove cut into gearbox accommo-
dates O-ring to eliminate oil leaks.
Optional adjustable inlet
guide vanes.
Gear drives oil pump to
ensure ecient lubrication.
Twin-pinion Gearbox Confguration
This cross-section shows how easily the gearing, bearings and seals can be accessed when the top o
the split compressor gearbox is removed.
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Second stage housing First stage housing
Third stage cross section
Removing the top hal o the horizon-
tally split gearbox at the second split
line provides access to the rst and
second compressor stages.
Horizontally split gearbox top enables
access to gearing, seals and bearings in
the third compressor stage without
removing the entire upper gear cap.
Three-pinion Gearbox Confguration
This cross-section shows how the gearbox is confgured to accommodate the third pinion, retaining the
compact compressor gearbox design and small ootprint.
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Technical Features
Operating Control System
Commercially available PLCs are used to monitor and
control processor operation enabling you to obtain
hardware rom a local source. All system programming
is done by Atlas Copco engineers who have expertise in
both compressor and control sotware technology to
optimize perormance.
The customized control system continuously monitors
temperature, pressure and vibration data, and automati-
cally adjusts or controllability. All relevant settings can
be programmed to your requirements.
Surge anticipation system
An optional surge anticipation system is oered to
operate the compressor beyond the surge limit while
maintaining maximum possible turndown under
varying inlet conditions.
Remote compressor control and sequencing
SC/TP-Series compressor control systems can be linked toyour central control system via RS232C, RS485 or other net-
working systems or ecient remote monitoring and control.
USER PLANT
SYSTEM HEADER
CUSTOMERSPROCESSCONTROL
SEQUENCER
S Y S T E M 1
S Y S T E M 2
LCP = LOCAL CONTROL
= EL. SIGNAL
= DATA LINKAGE
Turbocompressor
CompressorControl
ProcessComputer
Driver
Relay
Service Terminal
Optional Terminal
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0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
1.4
1.2
1.0
0.8
0.6
0.4
0.2
-80.00 closed
α = Inlet guide vanes position
= 1.0
0.980.95
0.90
20.00 open
α = 0.00
η
ηA
RELATIVE VOLUME FLOWV
1
V1A
R E L A T I V E P R E S S U R E R A T I O
P P A
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
1.4
1.2
1.0
0.8
0.6
0.4
0.2
α = -20.00 closed
= 1.02
1.0151.0
0.95
0.90
α = 20.00 open
α = 0.00
η
ηA
RELATIVE VOLUME FLOWV
1
V1A
R E L A T I V E P R E S S U R E R A T I O
P P A
α = Inlet guide vanes/discharge guide vanes position
Perormance characteristic or adjustable diuser vanes.
Perormance characteristic or adjustable inlet guide vanes.
Capacity Control Options
Because the compressor is an integral part o a process,
SC/TP-Series compressors are oered with capacity con-
trol options that make it possible to adapt the compressor
to changing process conditions (e.g. discharge pressure
and volume) or maximum fexibility and eciency.
Adjustable inlet guide vanes combined with adjustable
diuser vanes are recommended or applications with
very high pressure ratios, steep pressure variations and
medium operation ranges – a good choice or o-design
perormance in a wide control range.
Simultaneous control o inlet guide vanes and diuser
vanes oers maximum capacity control with minimum
power consumption.
P R E S S U R E R A T I O
BROAD PERFORMANCE RANGE FOR EVERY APPLICATION
40:1
12:1
10:1
3.5:1
ACFMx1000 .3 .6 .9 3 6 10 30 60
m3/hx1000 .5 1 1.5 5 10 17 51 102
S C - 6
T P
- 1 4 / 1 0 / 6
T P
- 1 0 / 1 0 / 6
T P
- 1 0 / 6 / 6
T P - 6 / 6 / 6
T P
- 1 4 / 1 4
T P
- 1 4 / 1 0
T P
- 1 0 / 1 0
T P
- 1 0 / 5
T P
- 6 / 6
S C - 1 0
S C - 1 4
S C - 2 0
S C - 2 8
SC-32
SC-40
Standard SC-Series centriugal compressors handle fows rom 680 to
110,000 m3 /h (400 to 68,000 ACFM). Standard TP-Series models handle
fows rom 680 to 20,400 m3 /h (400 to 13,000 ACFM). For fows and pressures
greater than those shown here, consult our GT-Series brochure.
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Quality Management
API Options
Atlas Copco has many years o experience supplying
integrally gearing centriugal compressors designed and
built with minimum deviation to API specications. This
includes API-672 and API-617 with oil systems to API-614.
When compared to traditional API-617 ‘’between bearings’’
compressors, the Atlas Copco integrally geared machine is
the reliable, maintenance-riendly and cost-eective option.
Material
In accordance to ASTM with equal or better characteristics
than specied. Threads, bolts, struts, pipes, fanges and
instruments in accordance to equivalent standards ISO,
DIN and CENELEC.
Lube Oil System
Integrated to the main equipment package. Lube oil supply
with mechanical drive, main oil pump and auxiliary
motor-driven pump. Option to API-614.
Gear
Integrated helical gear designed to AGMA Q-13 (DIN 5/6).
Option to API-613. Bearing housing is part o the
gearbox casing.
Rotor Dynamic
Options: Shop verication test with unbalance. Residual
unbalance check.
Bearings
Radial bearing tilting pad design. Thrust bearing tapered
land type. Tilting pad Kingsbury-type thrust bearings are
available as an option.
Vibration Limits
Per API-617 or API-672. Torsional analysis.
Coupling
Flexible multi-disc coupling. Option API-671
Casing
Plenum, scroll or older volute. 2DFE analysis.
“API capabilities includes applications in
chemical and gas process industries.”
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Quality Standards
High quality standards, rom design through commis-
sioning, are undamental to every Atlas Copco project.
The eectiveness o our quality management protocols
is evidenced by our certication to ISO 9001 standards.
Dedicated quality assurance programs are enhanced by
detailed data and project management control, CAE/CAD
databases and application programs. Our adoption o the
metric SI-Systems helps ensure interchangeability o com-
ponents and local availability o more common parts – an
important consideration in an emergency situation.
Quality assurance includes complete acceptance testing at
operating pressures and speeds in compliance with ASME
PTC 10. All specied operating conditions are simulated
and perormance o all compressor components is mea-
sured and recorded prior to nal approval.
“We promise you a commitment to quality
products and prompt, responsive service.”
ISO 9001A consistent quality earned
us the industry’s leadership
and the customer’s trust.
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Products and Applications at a Glance
SC-6 single-stage compressor
Used or hydrogen compression in
Thailand.
SC/TP-Series integrally-geared
centriugal compressors are oered
in single and multi-stage designs
(1-5 stages) to handle all gases at
fows rom 250 - 110,500 m³/h (150 to
65,000 cm) at a discharge pressure
up to 55 bar (a) / 800 psia.
TP6/6 two-stage compressor
Engineered or hydrocarbon services.
Standard TP-Series models handle
fows rom 680 to 20,400 m³/h (400 to
13,000 ACFM) and eature completely
assembled process gas piping andon-base PLC control system in NEMA
4 enclosure to meet Class 1, Group C
& D, and Division II area classication.
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SC-28 single-stage compressor
Is integral to the desulphurization
process or a diesel uel producer.
SC/TP-Series integrally-geared
centriugal compressors are oered
in single and multi-stage designs
(1-5 stages) to handle all gases at
fows rom 250 - 110,500 m³/h (150 to
65,000 cm) at a discharge pressure
up to 55 bar (a) / 800 psia.
SC-6 single-stage compressor
Installed on skids with auxiliary
equipment or uel gas boosting.
Flow rates are 90.000 Nm3 /h (56,000
scm) at an inlet pressure o 24 bar
(350 psi), and a discharge pressureo 40 bar (580 psi).
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ItalyGianranco Marinelli
Phone: +39 02 61 79 94 50
Fax: +39 02 66 01 18 90
gianranco.marinelli@it.atlascopco.com
JapanMichael Shaer
Phone: +81 3 57 65 78 24
Fax: +81 3 57 65 31 97
michael.shaer@jp.atlascopco.com
NordicHeikki Alanko
Phone: +358 8 51 67 64
Fax: +358 8 51 68 24
heikki.alanko@f.atlascopco.com
RussiaDaniil Korobko
Phone: +7 495 933 55 50
Fax: +7 495 933 55 60
daniil.korobko@ru.atlascopco.com
South AfricaWayne Jacobs
Phone: +27 11 821 91 24
Fax: +27 11 821 91 06/7
wayne.jacobs@za.atlascopco.com
SpainRaael Cañete
Phone: +34 91 276 91 54
Fax: +34 91 671 31 16
raael.canete@es.atlascopco.com
South KoreaSeungHoon Yang
Phone: +82 2 21 89 40 80
Fax: +82 2 522 19 79
shyang@kr.atlascopco.com
Our Points o Contact Worldwide
Headquarters
Atlas Copco Energas GmbH
Am Ziegeloen 250999 Cologne, Germany
Phone: +49 2236 96 50 0
Fax: +49 2236 96 50 899
atlascopco.energas@de.atlascopco.com
www.atlascopco-gap.com
Application Centers
Europe, Middle East and AfricaAxel Teschner
Phone: +49 2236 96 50 618
Fax: +49 2236 96 50 899
axel.teschner@de.atlascopco.com
North and South AmericaNasser Sadeghzadeh (Comptec)
Phone: +1 518 765 58 38
Fax: +1 518 765 33 57
nasser.sadeghzadeh@us.atlascopco.com
Randy Dirlam (Maf-Trench Company)
Phone: +1 805 928 57 57 275
Fax: +1 805 925 38 61
RDirlam@Maf-Trench.com
Far East
Sander van SpijkPhone: +86 21 62 55 13 31
Fax: +86 21 62 55 19 63
sander.van.spijk@cn.atlascopco.com
IndiaS.S. Vasan
Phone: +91 20 39 85 23 09
Fax: +91 20 27 14 59 48
ss.vasan@in.atlascopco.com
Customer Centers
Alpine/Balkan StatesPeter von Graenried
Phone: +41 61 731 37 00
Fax: +41 61 733 94 40
peter.von.graenried@ch.atlascopco.com
BahrainEmile Bado
Phone: +973 17 22 15 33
Fax: +973 17 22 95 11
emile.bado@bh.atlascopco.com
BeneluxJan Hop
Phone: +31 64 620 37 30
Fax: +31 33 299 95 06
jan.hop@nl.atlascopco.com
BrazilRoberto G. Becker
Phone: +55 11 34 78 87 11
Fax: +55 11 41 95 70 90
roberto.g.becker@br.atlascopco.com
FrancePatrick Coupel
Phone: +33 1 39 09 31 60
Fax: +33 1 39 09 30 51
patrick.coupel@r.atlascopco.com
Germany
Axel Teschner
Phone: +49 2236 96 50 618
Fax: +49 2236 96 50 899
axel.teschner@de.atlascopco.com
Great BritainIan Mather
Phone: +44 1442 22 23 35
Fax: +44 1442 84 05 06
ian.mather@uk.atlascopco.com
IranAli Rakhshani Moghaddam
Phone: +98 21 66 93 77 11 322
Fax: +98 21 66 92 73 14
ali.rakhshanmoghaddam@ir.atlascopco.com
©
A t l a s C o p c o 0 7 / 2 0 0 8 P r i n t e d i n G e r m a n y .
B 0 5 / 0 0 4 / 2 4 / 0 8 0 8
Atlas Copco Energas GmbH
Gas and Process DivisionAm Ziegeloen 2 . 50999 Cologne, Germany
Phone: + 49 2236 96 50 0 . Fax: + 49 2236 96 50 899E-Mail: atlascopco.energas@de.atlascopco.com
www atlascopco-gap com
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