here for printable .pdf
brochure of Hoffman Filtration
on these links to read about:
RELIABILITY AND BENEFITS THROUGHOUT INDUSTRY
Vacu-Matic Filters have been used around the world to
provide cost effective and trouble-free filtration in a wide variety of
applications. The Vacu-Matic Filter's design provides positive
filtration for suspended particles, skimming of floating contaminants
(tramp oils, gels, etc.), and aeration to eliminate bacterial growth and
Vacu-Matics are used to reclaim and recycle industrial coolants,
filter process liquids, and clarify waste effluents. The results are
Quality Increased - prevents
being reintroduced into lines and damaging products.
- less liquid and energy consumption,
decreased waste disposal, increased equipment and tool life,
and the Vacu-Matic's proven reliability which results in lower
maintenance costs and less down time.
- automatic media index and
discharge of the dried filtrate cake into a collection bin provides
maximum filtration with minimum user interface needed.
F-2500 Vacu-Matic filter. Note the clean/
dirty tank below the filter and the catwalk
structure to enable ready access to the filter's
Effectiveness In A Wide Variety Of Coolant And Processing Applications
Following are just some of the applications in which the Hoffman
Vacu-Matic filter has been used with great success:
Hot & Cold Rolling
Mill Waste Filtration
Paint Booth Filtration
Can Body Production
OVERVIEW OF THE VACU-MATIC'S . . .
. . Filtration Process
Hoffman Vacu-Matic Filters are flat
bed vacuum units. A continuous metal conveyor belt supports the disposable
filter media, while a heavy-duty Gardner Denver exhauster creates a vacuum
beneath the media. As the liquid to be
filtered is drawn through, a filter cake is formed. As the cake thickens,
the vacuum increases and, at a preset limit, a
vacuum switch causes the belt (and media) to be indexed. As media is newly
exposed, it can be pre-coated by dirty
liquid prior to entering the vacuum chamber.
. . . Benefits
The Vacu-Matic utilizes the flow of air to perform three
major functions. First, air is used to dry the cake prior to
sludge removal. This minimizes loss of process liquids and reduces sludge
disposal costs. Second, using the
standard air skimmer, air flow is directed by the exhauster discharge over
the liquid pool to skim away floating
contaminants. Third, air passing the filter chamber aerates the cleaned liquid.
This is particularly important in the
case of coolants to control bacteria growth and resulting coolant rancidity.
. . Standard Components
Heavy duty Gardner
Denver's Hoffman cast iron exhausters are
installed on all Vacu-Matic filters. All heads and sections of this unit are
constructed of cast iron, which reduces sound levels, ensures longevity, and
simplifies maintenance. Cast iron construction also permits Gardner Denver to
design flow passages which maximize efficiency. Adjacent to the blower is the
drive and motor gearbox used to index the media belt.
and Flat Wire Belt - Hoffman's unique seal and
flat wire belt are built- in
to each Vacu-Matic unit. Permanent butterfly clips form the moving seal in the
carbon steel flat wire belt (other materials optional). The stationary component
of the seal is a PVC extrusion (Buna "N" and Teflon also available)
held in place
by stainless steel hold down springs. This assembly securely holds the media
to the belt and ensures a positive liquid seal. Special seal arrangements are
for paint sludges and other "problem" filtrates.
wire belt and seal with permanent
WORKING VIEW OF THE HI-FLO VACU-MATIC