Monitoring & Pollution Prevention
Isolator Rings Seal the Deal in Maryland
B
altimore County, Md,. is in the process of upgrading its sewerage lift stations to ensure they remain
operational during flood events. The county replaced
conventional pumps with dry-wet submersible pumps.
During a flood event, these pumps can operate continuously
even when submerged under 40 ft of water.
As a part of this modernization program, Baltimore
County officials wanted to automate the pump monitoring
function. Instead of having to routinely send someone out
to monitor discharge pressure gauges, the county wanted
the pump condition to be transmitted electronically to a
central monitoring station. The problem was that the existing mechanical gauges with diaphragm seals were virtually
useless. Diaphragm seals that were supposed to protect the
gauges invariably became impacted with suspended solids,
and the gauge pointer was frozen in place. Routine flushing
proved wholly inadequate to keep these gauges functional,
as the diaphragm would clog within a few hours of flushing.
The county replaced the diaphragm seals with Onyx
isolator rings. These rubber-lined isolator rings are easily
installed between standard pipe flanges and provide an
unobstructed flow path with no stagnation zones that can
clog or plug. Clean instrument oil inside the isolator ring
transmits process pressure to the gauge and transmitter.
Onyx fitted these rings with pressure-balanced gauges
designed for continuous submerged operation combined
with submersible transmitters. During a recent storm event,
several of these pump stations flooded, but Onyx isolator
rings continuously transmitted accurate pressure signals,
even while submerged under 40 ft of water for several weeks.
Onyx Valve Co.
856.829.2888 • www.onyxvalve.com
Write in 814
Write in 764
www.estormwater.com |
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