Maximising efficiency
One possible solution for delivering improved efficiency
is a closed loop controller that features a flow sensor, a
process controller and a control element, all in one unit.
As such, a compact and flexible design would enable
the flow controller to be installed easily and provide
accurate management of the compressors.
Bürkert specialises in developing solutions for customers
in a diverse range of industries, delivering flow control
systems for a wide variety of applications. The latest
offering addresses the issues associated with creating
a standalone control system for pneumatic conveying,
all in one product. The Type 8750 flow rate controller
provides a solution that can reduce operating costs and
improve productivity through better management of
the compressors.
The pneumatic seat valve compensates for the air
leakage across the rotary valve that introduces the solids
to the conveying air stream. The Type 8750 can store
the flow leakage curve of each rotary valve so that for
any given inlet pressure the 8750 knows how much
additional air is required to compensate for the air lost
from the system by the rotary valves.
The flow rate control system consists of an ELEMENT
continuous control valve (Type 2301) with a compact
process controller (Type 8693) and two pressure
transmitters, (Type 8323). These components are
supplied as an assembled system that negates the
requirement for a separate flow meter. Using the
pressure difference across the valve and the given
density and temperature of the medium, a nominal flow
can be calculated, providing the flow characteristics
of the valve to the process controller. The volume flow
can then be adjusted by changing the stroke of the
control valve. The control valve serves as an orifice plate
to connect pipework so installation is straightforward
and there is far less of a pressure drop compared to
alternative arrangements.
Creating flow control systems can be a complex issue,
especially if you are dealing with the pharmaceutical
or the food and beverage industries. The standards
that need to be met when designing and constructing
processing infrastructure can be very stringent. Bürkert
has been designing and installing flow control systems
for these, and many other industries, for 70 years and in
this time has developed an in-depth knowledge of the
requirements for success.
The Type 8750 flow rate controller provides a solution that can reduce operating costs
and improve productivity through better management of the compressors.
For further information:
Bürkert Fluid Control Systems: Helen Christopher
Tel: +44 (0)1285 648720
Fax: +44 (0)1285 648721
Web: www.burkert.co.uk
Email: [email protected]
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