Evaporators for Food & Dairy Products
The Marriott Walker Corporation proudly offers an entire range of custom
designed evaporators for food and dairy products. Production evaporators,
of either the TVR or MVR types, are available in a range of sizes to suit
your needs. In addition to the basic evaporator, Marriott Walker Corporation
can also provide HTST pasteurizers, heat treatment holding tubes and hotwells,
as well as post-evaporation flash coolers.
to the development of multiple-effect, continuously operating evaporators,
the standard evaporating procedure was to use a "batch operated"
evaporator called a vacuum pan, in which the product to be condensed is
"cooked-down" under vacuum, within one vessel. Vacuum pans are
still used in a variety of special applications and they can have internal
heating coils, or the product heating can be accomplished in a jacketed
vacuum vessel. The external shell must be provided with a separate condenser
and vacuum pump, to permit the unit to operate at the desired temperature.
For viscous products, batch-type vacuum pans can be provided with swept-surface
agitators. Vacuum pans are often the evaporating technique of choice for
jams, jellies and some other specialty products.
Marriott Walker Corporation has provided numerous pilot plant evaporators
for commercial R&D facilities as well as university teaching facilities.
Our pilot plant evaporators are always custom designed to suit a processor's
The simplest pilot plant configuration is that of a rising film "batch
type" evaporator, in which the evaporator is filled and the product
is recirculated under vacuum until the desired finished solids level is
accomplished. The vacuum is then broken and the product is discharged
from the evaporator.
The more complex variation is a continuously operating, falling-film,
evaporator, which permits a more realistic "scale-up" from pilot
plant to production facilities. If provided with robust vacuum producing
equipment and an adequate condenser and cooling water supply, pilot plant
evaporators can be designed to operate at temperatures as low as 80°
If your facility would benefit from the flexibility offered by having
an "in-house" pilot plant evaporator, please contact the professionals
at Marriott Walker Corporation.