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Submitted
Articles: ARTC02061801
Article: Acoustic Filters
Submitted
by: Savant Measurement Corporation USA
Submit date:18/06/02 |
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Savant Measurement Corporation
is committed to providing the user community with
a variety of cost effective, engineered solutions
for everyday application challenges. As such,
we maintain a broad product line, including both
Flow Conditioners (GFC® and pFC™) and Acoustic
Filters, (SAFE™ and Destroyer™) to fulfill the
varied needs of our customers.
The SAFE and Destroyer provide the user with the
option of using either or both devices as required
to satisfy the need for noise reduction for Multi-path
Ultrasonic Meters (MUSM). If the noise is of such
a magnitude that line of sight and total absorption
is required then both maybe used, if it is not
convenient to employ the use of a single blind
tee.
If the anticipated noise reduction required is
in the order of 20-30 dB a single SAFE would be
sufficient for the installation even if the noise
is coming directly at the meter. Testing has shown
that the SAFE demonstrates gross noise absorption
of 40-50 dB with indirect noise and 20-30 dB with
direct noise. Thus the user has the flexibility
to determine which installation option best suits
the application and mechanical limitations of
the station design.
Based on research carried out it is anticipated
that in the worst-case flow\dP noise scenarios
a noise
reduction of 40-50dB satisfies most "noisy"
applications. This reduction provides the MUSM
with the
opportunity to work within a reasonable signal
to noise or gain ratio level.
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Destroyer®
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SAFE®
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The Destroyer and SAFE have
both been designed for simple retrofit and new
installations. They both utilize a single flange
connection. In the case of the SAFE it is 3\4"
between flanges, with a single pin connection
downstream on the element canister of the assembly,
thus ensuring mechanical robustness in real world
installations.
The SAFE has been thoroughly tested in both wet\dry
and dirty\clean scenarios. Wet testing used a
combination of both water and hydro-carbon components
to emulate the combination of water, pipeline
rouge and compressor oil.
The SAFE may also be retrofitted easily with new
absorbent elements as required.
Installation of the devices is easily accomplished
with either existing or new flow conditioner installations
and may be deployed where the noise source is
upstream or downstream in either unidirectional
or bi-directional installations.
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Performance
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