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ARCA
delivers compressor blow off valves for largest
compressor
The company ARCA Regler in Germany delivered several
compressor blow off valves, DN 600/1200, with
a low-noise trim design used for the largest axial
compressor, that has ever been implemented in
an air compression plant. The 160 tons heavy compressor
manufactured by Siemens PGI, Duisburg will be
installed in the world’s largest air compression
plant, that is operated by SASOL in Secunda, South
Africa. The turbo compressor provides a capacity
of approximately 700.000 cubic meters per hour
of air. Two valves in split range control the
blow off operation. For security reasons and for
start-up a third valve has been installed. The
valves are required mainly during start-up and
shut-down of the compressor. In critical operation
or if the compressor must provide constant revolutions
during fluctuation in consumption, excess gas
is either diverted or blown off. The most important
task of the surge limit control valve, however,
is to serve as safety valve in case of adjustments
in the surge protection control. The surge control
prevents the so-called pumping as a result of
flow interruption in case the flow drops below
the minimum capacity. This may cause severe damage
to bearings and rotor. For economical reasons
the safety margin between blow-off line and surge
limit is kept as small as possible. This is achieved
by a sensitive control valve operation and the
ability to quickly open without over-loading or
stroking to the full open position in case of
blow off. SASOL South Africa uses the compressor
for the production of oxygen which is used in
coal gasification. Synthetic gas, which is produced
in this process, is converted to sulphur-free
fuel in further refining steps. Due to economical
and environmental advantages the world demand
of sulphur-free fuel will tremendously increase
in the next years.
For
more information on ARCA products and services
please visit our website www.valve.co.za,
or contact Valve & Automation (Pty) Ltd
Johannesburg : sales.jhb@valve.co.za
or call +27-11-397 2833
Durban : sales@valve.co.za
or call +27-31-579 2593 |
