Maintenance Technology October 2016 - 29


FOOD & BEVERAGE
systems
positive-displacement pumps with
a pump. As the level goes down, the
double mechanical seals and a
pump speeds up. As the level goes up
water-flush system for the pumps.
the pump slows down to try to keep the
"This is common since sugar
level constant in this machine. There is
is tacky and sticky," Gramlich
a detector that is basically a rod. The
said. "Double-mechanical seals
higher the resistance on the rod, the
can help prevent the seal faces
more it lowers. That electric signal is
from gluing together when the
fed to the pump control to tell it how
pump is shut down after a batch
fast to go."
or run. Double-mechanical seals
The customer can set this level at
are expensive since you have two
what is called the dead band, which
per pump shaft and two shafts per
limits how far up and down in the tank
pump, and they require multiple
the pump will go. "This determines the
White-mass (plain yogurt) pumps at a major
parts. Plus you have the cost and
speed of the pump, and what you really
yogurt manufacturing plant are subject to a
complexity of the water-flush syswant is for the pump to slow down and
90-minute clean-in-place (CIP) cycle after 8 hr. of
tem that must be turned on prior to
speed up," Dillon said. "In this case,
operation. Each cycle involves flushing with nitric
pump starting and turned off after
they set the level to be a very narrow
acid, sodium hydroxide, and sodium hypochlorite
operation."
range. The pump would go to a maxisolutions, as well as clear water, and clear product
The cost of the flush water is of to sanitize the operation to meet USDA, FDA, state
mum speed very quickly and then shut
great concern in today's environoff. This was tearing up everything. All
agriculture, and local health department inspecment where all companies are
the torque was causing a lot of bendtion standards. Photo courtesy SEEPEX Inc.
seeking to reduce carbon footprints
ing and breaking. All kinds of terrible
and save resources, he added.
things can happen because of that high
"The water for the flush seals is not reused.
California, that face water restrictions and
momentary load. You cannot run electric
It goes down the drain and increases the
higher rates."
motors like that because they are rated for
sewer cost fees for the plant, so they pay
a certain amount of stops and starts. When
for it twice," he said. "When this plant had
CASE STUDY 2:
this happens the production guys have set
a seal failure, the color from the pump in
YOGURT AND
the levels, but the maintenance guys must
which the seal failed would leak on the floor
STERILIZATION
live with the results."
and create a mess and waste of ingredi"Yogurt is processed in a reactor and afterDillon said the solution is simple-use
ents. At initial moment of failure, the color
ward it is sent to a sterile aseptic filling mavariable-speed controls. "The VSDs will
at the leak point would squirt out of the
chine," Dillon said. "This machine packages
prevent the equipment from being subseals as the pump shaft rotated, spraying a
the yogurt in a totally sterile environment.
jected to high momentary loads and protect
360-degree stream of that color throughout
The package has been sterilized. The air is
it from a severe reaction to the way the
the room. This contaminated the other colsterilized. It's like a little clean room."
system was installed."
ors, and caused more loss of production,
The yogurt is sent to the top of a
Dillon offers simple advice when it
waste of ingredients, and increased sewer
volumetric filler. Every packaging operation
comes to maintaining food-and-beverage
and maintenance costs."
has one of these, Dillon stated. "It looks like
process pumping systems. "In general,
The solution was to install a Mouvex
a carousel, and it works like a carousel,"
try to minimize the pressures," Dillon said.
seal-less pump. This modification eliminathe said. The piston goes up and down, and
"Pressure equals power, which equals wear
ed the need for seal parts and the use of
the cylinder is filled with the product. As it
on everything. Maximize pipe diameters
water for the double-mechanical seal-flush
rotates, the piston goes down and pushes
and shorten the pipe runs. You pay for pipsystems. "The water saving alone was
the yogurt into the cup.
ing once, but you pay double for mainteenough to provide the payback on the proj"There is a tank at the top of this filling
nance in the long run." RP
ect," Gramlich said. "Nobody, except the
accounting department, thinks about the
water bill, an often overlooked and wasted
resource in facilities. Water waste is now
being looked at, especially in areas such as

OCTOBER 2016

machine that is filled with yogurt, soda,
cottage cheese, or whatever other food
product is being processed," Dillon said.
"This tank has a level control that puts
out a 4-to-20-milliamp signal and goes to

Michelle Segrest has been a professional
journalist for 27 years. She specializes
in the processing industries, and can be
reached at michelle@navigatecontent.com.

RELIABLE PUMPING SUPPLEMENT |

29



Table of Contents for the Digital Edition of Maintenance Technology October 2016

Maintenance Technology October 2016 - 1
Maintenance Technology October 2016 - Cover1
Maintenance Technology October 2016 - Cover2
Maintenance Technology October 2016 - 1
Maintenance Technology October 2016 - 2
Maintenance Technology October 2016 - 3
Maintenance Technology October 2016 - 4
Maintenance Technology October 2016 - 5
Maintenance Technology October 2016 - 6
Maintenance Technology October 2016 - 7
Maintenance Technology October 2016 - 8
Maintenance Technology October 2016 - 9
Maintenance Technology October 2016 - 10
Maintenance Technology October 2016 - 11
Maintenance Technology October 2016 - 12
Maintenance Technology October 2016 - 13
Maintenance Technology October 2016 - 14
Maintenance Technology October 2016 - 15
Maintenance Technology October 2016 - 16
Maintenance Technology October 2016 - 17
Maintenance Technology October 2016 - 18
Maintenance Technology October 2016 - 19
Maintenance Technology October 2016 - 20
Maintenance Technology October 2016 - 21
Maintenance Technology October 2016 - 22
Maintenance Technology October 2016 - 23
Maintenance Technology October 2016 - 24
Maintenance Technology October 2016 - 25
Maintenance Technology October 2016 - 26
Maintenance Technology October 2016 - 27
Maintenance Technology October 2016 - 28
Maintenance Technology October 2016 - 29
Maintenance Technology October 2016 - 30
Maintenance Technology October 2016 - 31
Maintenance Technology October 2016 - 32
Maintenance Technology October 2016 - 33
Maintenance Technology October 2016 - 34
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Maintenance Technology October 2016 - 37
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Maintenance Technology October 2016 - Cover3
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