& Services - Vibratory Shear
Enhanced Processing VMAT
[System Operation] [System
VMAT filtration system consists of 5 major components: the
frame, the drive system, plumbing, the filter pack and the
2" tubular steel construction is used with an
epoxy powder coat to assure resistance to chemicals
patented system includes a 10-20 horse power motor
which drives an eccentric weight and seismic mass
which in turn translates the energy through the torsion
spring into the filter pack.
(FEP), polypropylene, uPVC and stainless steel are
used throughout to assure maximum compatibility with
most solvents, caustics and acids.
filter packs employ a filament wound outer housing,
stainless steel plates, polypropylene or kynar permeate
carriers and epoxy resins. Dunwell offers in its filter
packs virtually every type of membrane made today
including: acrylic; nylon; polyacrylonitrial (PAN);
polypropylene; polysulfone; polycarbonate; PVDF (Kynar);
stainless steel; Teflon; thin-film composites; Tyvek
of these membranes have a wide range of pore sizes
to choose from insuring the optimum separation for
any application according to filtration
spectrum. At one extreme, reverse osmosis membranes
reject most dissolved compounds, including salts,
while allowing water molecules to pass. Nanofiltration
membranes have salt rejection ranging from 10% to
85% (these are sometimes referred to as water softening
membranes). While Ultrafiltration membranes can reject
molecules of sizes ranging from 1000 to 100,000 d.a.
Microfiltration with pore sizes ranging from 0.05
micron to 3 microns are also available for coarse
standard modular size of a VMAT System is 450 to 1,500
square feet composed of discs with a 19 inch active
diameter. Each disc element is manufactured and quality
assured by Dunwell.
systems are supplied with internationally branded
Programmable Logic Controllers. All components are
fully contained in a NEMA 4 rated enclosure.
levels of control sophistication are available depending
on the complexity of the application. For polishing
or low solids applications simple controls having
minimal outputs and inputs are provided. For high
solids applications controls with more features are
used to insure trouble free operation. The VMAT controller
typically sets solids levels by actuating the exit
valve based on operating parameters such as pressure
or flow rate.
control options available include automatic clean-in-place,
automatic flush, automatic shut down, full alarm features
with digital diagnostic displays, remote diagnostics
and monitoring, and many others. Dunwell engineers
have spent years perfecting VMAT controls to maximize
reliability and to minimize operator intervention.