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Industrial Applications
STC-SH
Siemens single-shaft centrifugal
compressors with horizontally split casing
Robust and dependable
Perfect process control
Single-shaft centrifugal compressors with horizontally split casings in the STC-SH series can be used
for the majority of process applications. They are
designed according to API 617 specifications.
Casings are mostly fabricated, but can also be
cast for special applications (e.g. low temperature).
The horizontally split casing split permits easy access
to all compressor internals by simply removing the
upper half of the casing.
STC-SH compressors can be controlled by either
throttling, bypass operation or speed variation,
and can therefore be operated with all available
drive systems (i.e. electric motors, steam and gas
turbines, as well as expanders). Adjustable inlet
guide vanes in front of the first impeller offer special
advantages regarding turn-down and part-load
efficiencies as required in certain applications.
Flexible adaptation
The design concept of STC-SH compressors is very
flexible, allowing easy adaptation to the requirements of specific process applications.
These centrifugal compressors can be equipped
with up to ten impellers, divided into up to four
process stages per casing. This enables multiple
intercooling and side streams. Designs include
straight through, double-flow and back-to-back
configurations.
A well-proven, fully-parametric aerodynamic
design, based on comprehensive in-house research
& development, allows for the perfect matching
of compressor performance and rotor dynamics
for any application.
State-of-the-art sealing
With a wide variety of sealing systems (labyrinth
seals, carbon ring seals, brush seals and mechanical dry gas seals), this robust compressor design
is suited for a wide range of process gases.
Mechanical dry gas seals, in combination with
active magnetic bearings for compressor and driver,
yield the special economic and environmental
benefits of dry-dry (oil-free) equipment operation.
Single-shaft centrifugal compressor
with horizontally split casing
Power Generation
Probedruck
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Technical performance data
Volume flows from 500 to 480,000 m3/h (300 to 280,000 cfm)
Discharge pressure for oxygen and inert gas up to 100 bar (1,450 psi)
Discharge pressure for other process gases up to 50 bar (725 psi)
Fields of application
On-/offshore Oil & Gas
Refineries
Petrochemicals
General chemicals
Fertilizers
and others
Olefins
Application range STC-SH
100
1000
50
500
Speed
min-1
Discharge pressure
p.bar
Frame sizes
05
06
08
10
12
14
17
20
23
p.psi
21,000
10
Speed range
100
15,000
5
50
Boil-off turbocompressor
in an LNG plant
9,000
3,000
1
0
10
0,4
1
0,5
V .1,000 m3/h
1
V .1,000 cfm
10
50
10
100
50
500
100
280
Actual suction flow rate
Eight-stage coker gas turbocompressor for a refinery
Published by and copyright © 2005:
All rights reserved.
Siemens AG
Power Generation
Industrial Applications
Wolfgang-Reuter-Platz
47053 Duisburg, Germany
e-mail: welcome.pgi@siemens.com
www.pg.siemens.com
Siemens Industrial
Turbomachinery, Inc.
10730 Telge Road
Houston, Texas 77095, USA
Order No. A96001-S90-A149-V1-4A00
Printed in Germany
1388 177140M DA 06052.
Subject to change without prior notice
Trademarks mentioned in this document
are the property of Siemens AG, its affiliates,
or their respective owners .
The information in this document contains
general descriptions of the technical options
available which do not always have to be
present in individual cases. The required
features should therefore be specified in
each individual case at the time of closing
the contract.
Probedruck