Brochure

Continued enhancement of this essential component of
the ethanol process is critical to achieving plant output and
revenue targets. Fisher control valve assemblies for molecular
sieve adsorption applications are tested to one million cycles
to meet Emerson’s high-cycle quality standard.
Molecular Sieve Adsorption
With the competitive environment in the ethanol industry
constantly increasing, now is the time to focus on improving
overall plant efficiency and reliability. Regardless of plant
scale, the molecular sieve adsorption application presents a
significant opportunity for such improvements.
In surveying ethanol producers from around the world, some
of the most commonly reported maintenance problems
related to the molecular sieve adsorption unit include:
•
Selection of oversized butterfly valves leading to poor
control and reduced cycle life
•
Accelerated bearing wear, often seen after only a few months
•
Poor valve-actuator-positioner linkages leading to multiple
mechanical failures in a high-cycle environment
•
Poor performance from low-quality valve positioners in both
the adsorption and regeneration cycles
Nonstop High-Cycle Applications | 5
Molecular Sieve Adsorption
Improper selection of control valve
assemblies can lead to unscheduled
downtime. During this downtime,
a typical 50 million gallon-per-year
ethanol facility can suffer over
$10,000 USD per hour in lost revenue.