STC-SX Siemens Turbocompressor –
Single Shaft, Axial Design
More than 50 Years of Experience
The compressor type STC-SX is optimally
featured for today’s blast furnace requirements – which are characterized by the
continuous strive for larger compressor
units with increased efficiencies. Siemens
axial blowers STC-SX have proven to meet
customer needs: designed to handle large
volume air flows and other clean gases with
excellent efficiencies. Design and material
selection lead to optimum reliability and
reduce maintenance needs.
Since the 1950’s, the concept of STC-SX
has continuously been optimized. Designed
in accordance with API 617, this product
line now allows for volume flows up to
1,300,000 m³ / h.
Siemens Turbocompressors
Answers for energy.
Fields of Applications
Blast furnace air
FCC (Fluid Catalytic Cracking) air
Highlights
The perfect match for large
volume flows
Excellent efficiency
Low maintenance costs
Design Concept
High Flow Rates at High Efficiencies
Modular Principle
Designed for large volume air flows and
other clean gases over a wide operation
range, STC-SX blower series guarantee
excellent efficiency. With their low powerconsumption, Siemens turbocompressors
optimize a plant’s energy balance.
The design principle common to the STC-SX
series is a modular concept. It is based on
finely graded machine elements and flow
components that have proven their reliability over many years of operation. A great
variety of casing sizes and blade sizes
allows for tailor-made design according
to individual specifications. Depending on
the volume flow and the necessary pressure
ratios, the size of the flow components and
the number of stages are chosen from the
construction kit. Implementing reliable components lead to high flexibility in order to
meeting process requirements.
Casings have an axial or radial inlet, minimizing flow loss. As standard, they are
fabricated. On special request, Siemens
also offers cast casings. These machines
are typically uncooled straight-through
blowers, optimal for high discharge
temperatures.
STC-SX
Electric-motor-driven axial blower STC-SX for an FCC plant.
Rotor assembly of an axial
blower at the Duisburg
manufacturing site.
Highlights
Tilting pad bearing for journal
and axial thrust bearing
Up to 19 stages
Improved efficiency due to new
blading technology
Rotor blades of first and second
stage are made of duplex steel
Corrosion resistance due to unique
material usage
Control Systems
Broad range of appropriate
control systems
- Performance control
- Independent anti-surge protection
- Anti-choke control
Control by either speed variation
or adjustable guide vanes, or a
combination of both
Remote Monitoring System (RMS)
for preventive maintenance and
optimum performance
Technical Data
Flow rates from 50,000 to 1,300,000 m³ / h
(30,000 to 825,000 cfm)
Pressure ratio between 1.9 and 6.0
Speed up to 9,000 rpm
Discharge temperature up to 350 °C
Various control systems to optimize operation
Driver: electric motor or steam turbine,
depending on process and energy resources
Benefits
Combining reliable technology with innovative development,
Siemens STC-SX axial flow compressors guarantee benefits that
optimize your business.
Compression of large volume flows
Highest degree of efficiency
Extended operating range
Modular and robust machine design
High quality due to proven components and API standards
Prevention of wear due to optimized material selection
Low operating and maintenance costs
Service and maintenance work at the rotor of a blast
furnace blower.
Application Range
STC-SX is the perfect match for volume flows
up to 1,300,000 cubic meters per hour. The axial
blower realizes pressure ratios up to 6.
Speed
U /min
p/p
9,000
8
8,000
7,000
Pressure ratio
6
6,000
5,000
4
4,000
3,000
2
70
100
150
250
350
450
600
1,000
1,300
2,000
1,000
0
50 70
100
200
300
500
700
1,000
V x 1,000 m3 /h
Published by and copyright © 2008:
Siemens AG
Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens AG
Energy Sector
Oil & Gas
Wolfgang-Reuter-Platz
47053 Duisburg, Germany
Siemens Energy Inc.
10730 Telge Road
Houston, Texas 77095, USA
For more information, please contact
our Customer Support Center.
Phone: +49 180 524 70 00
Fax:
+49 180 524 24 71
(Charges depending on provider)
E-mail: support.energy@siemens.com
www.siemens.com / energy
Oil & Gas Division
Order No. E50001-G420-A111-X-4A00
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Dispo 05400, c4bs
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are the property of Siemens AG, its
affiliates, or their respective owners.
Subject to change without prior notice.
The information in this document contains
general descriptions of the technical
options available, which may not apply in
all cases. The required technical options
should therefore be specified in the contract.