Critical Components Of A
Washdown Gear Reducer
The type of housing, venting, lubrication and shaft seal are all critical components
of a washdown gear reducer, and
these features should be carefully
evaluated before selecting a
gear reducer for a food industry
application. Understanding the
advanced features available will help
you select the most durable product.
1. Housing: Most washdown gear products are offered with
either a cast iron housing covered with an anti-corrosion coating,
or stainless steel housing. A coated cast iron housing is the most
cost-effective housing option. However, the type of anticorrosion
coating, and how it is applied, makes a large difference in product
performance at the customer’s site. Stainless steel can be used in
applications that will not allow coatings.
2. Venting: Whether the housing is cast iron with epoxy coatings or
stainless steel, look for a pressure relief type of vent if the reducer
is vented. A standard open vent, even if equipped with chemicals to
absorb moisture, will ultimately allow moisture to enter the reducer,
resulting in premature failure.
3. Lubrication: To properly lubricate the gear reducer and avoid
contaminating food product, lubricants should have a NSF H1
(incidental contact) rating. Reducers using NSF H2 (no contact)
lubricants offer no advantage and should not be considered an
approved product for incidental food contact.
4. Sealing: One of the lowest-cost components of a gear reducer,
which nevertheless serves a critical function, is the shaft seal.
Shaft seals in non-washdown gear reducers seal the lubricant in
the reducer and keep dirt and other solid contaminants out. In a
washdown application, the shaft seal must still keep the lubricant
in the reducer, but it must also keep out water and chemicals being
used to clean the exterior of the reducer. If the seal allows water
into the reducer, the internal components will rust and the lubricant
will break down. Ultimately, the gear reducer will prematurely fail
from a combination of these two conditions.
To avoid these issues, look for enhanced shaft sealing systems
that consist of specialty seals designed to keep the water and
chemicals out. Commonly referred to as harsh duty seals, the seal
construction is modified to provide a positive method for keeping
the water spray from the sealing lip.
R&D Engineering Manager
ABB Motors and Mechanical Inc.
Side Load Hydraulic Lift & Dump
This unit safely
material into an
at 81” above floor
level. A stainless
a clean operation
which provides excellent rotational control and extended
equipment life. The unit also features a custom container and
pallet retention system, automated controls and a three-sided
safety light curtain guarding package for safe and efficient
operation. An exclusive lifting assembly package provides low
clearance container rotation. Units can be custom designed for
your application requirements.
Material Transfer www.materialtransfer.com
25kg Bag Filler
The 25kg bag
with food and
and can be
any bulk powder
provides a high
level of accuracy
making it easy
to use. Features
that allow for
include single-and multiple-head fillers, check weighing, gassing systems, metal detection,
de-aeration, inkjet printers and sampling.
Powder Process-Solutions www.powder-solutions.com