QA Series Gravity Flow Sifters

Guards removed for clarity.

The ultimate in reliable performance,capacity, versatility and sanitation foryour sifting or screening operations.

P. O. Box 149 • 2017 S. 4th Street
Leavenworth, KS 66048
P: 913-682-2291 • F: 913-682-1431
www.gwmfg.com • E: sifter@gwmfg.com

Product Protection & Production Sifters Since 1858

Feature Overview• Gyratory motion: gentle and accurate• Compact floor area
• Wide range of capacities. Multiple models use from 3 to 9 sieves.
• Accurate separation and sizing of a single product stream into two
or more particle sizes.

• Screen area matched to application.
• Adaptable to a wide range of products, capacities, number ofseparations, and screen sizes.
• Easy opening and positive sieve clamping provided by reliable
pneumatic sieve compression system.
• Reliable Tru-Balance drive mechanism that results in less stress on
the sieve frames and less motion between the sieve frames.
• Easily customized to suit your installation requirements.
• Every unit test run and balanced prior to shipping.
• Easy installation.

Construction• 304 stainless steel sieve frames with laser cut internal components
ensure precision fit. 316 stainless steel optional.

• Glass bead blasted finish• Sieve fabrication designed to minimize welding. No bolted orriveted joints. Easily removed insert tray Interior of sieve iscompletely accessible for cleaning.
• Each screen tray assembly includes screen cleaner support
backwire. Screen cleaners gently bounce on the support to keep
the screen apertures open as compared to other screeners that usebeaters or paddles that result in product abrasion fracturing
fragile ingredients and causing excessive screen stress• Standard drive frame and guards fabricated from mild steel withpowder coated finish. Stainless steel drive components are optional.
• Low power requirements

Sieve

TrayGaskets• Sanitary construction with welded
sieve frames. No rivets, nuts, bolts,
or crevices.

• Screens mechanically stretchedand bonded to trays for sanitaryattachment and superior screen
tensions. Frames can bere-screened indefinitely.

• Snap-on neoprene gaskets for sieve
to sieve seals. No adhesives
required for gasket attachment.

Our pneumatic sieve
compression andmodular interlocking
frame simplifies yoursanitation andmaintenance.
• Sifter can be opened, sieves
completely removed and maintained, and reassembled inminutes... without special tools.
Downtime is minimized.
• Pneumatic sieve clamping
system allows fast disassembly.
The sieves and screen trays simply
interlock with one another.
• Using pneumatics the upper drive
frame is raised to open the sifteror lowered to compress and seal
the sieve stack. The pneumatics
maintains constant compression
while the machine is in operation.
• Our drive and frame carriers areengineered to minimize gasket
wear and eliminate leaks. The
Tru-Balance drive transfers thegyratory motion to both the top
and bottom drive carriers
simultaneously. In turn, thecarriers equally impart the sifting
motion to both the top and bottomof the sieve stack. The inertial"top heavy" lag, common to sifters
with drive mechanisms positioned
below the sieve frame stack,is avoided.
• Stainless steel sieve and productcontact zone construction allows
cleaning to be accomplished withdry brushing, air cleaning, water
wash down or steam cleaning.
• Dust tight gasketed construction.
No suction requirements.
• Sieves remove completely. Smoothcrack and crevice free bottom
dome with easy access to outlet
transitions for thorough cleaning.

• Proven, reliable Tru-Balancedrive mechanism provides thegentle, gyratory sifting
motion for which our sifters
are known.

• The pneumatic sieve
compression system speeds
access for inspection
and maintenance.

• Upper and lower drive carriers
remain attached to the drive
mechanism.

Our gentle horizontal
gyratory motion reduces
product degradation• Horizontal gyratory motion is superior todesigns using vibratory or centrifugal action.
• Vibratory designs bounce materials verticallyshortening the time they are in contact withthe screen and reducing efficiency. Elongatedoversized particles can pass through the screen
impairing separation quality.
• Our gentle gyratory sifting action is lesssevere than centrifugal sifters. Separation ofnear sized particles is more precise and therisk of fracturing oversize impurities andforcing them through the screen is diminished.

Our stacked screen construction offers
many advantages over single deck
screening equipment.
• Vertically nested series of frames conserves valuable plant floor
space while offering maximum grading flexibility.
• Multiple screen frames allows the sifting surface of each specificmesh to be proportioned for highly efficient grading of materials.
• Smaller frames and screens are easier to handle, change and store• Smaller screens are less likely to sag and form pockets thatcollect material.
• Our Tru-Balance counter weighted drive neutralizes frame andmounting vibration allowing the unit to be attached to the floor orceiling with minimal footings or supports.

Who Are We?
Great Western Mfg. Co., Inc., designs and manufactures custom industrial processing machinery. Our lineof sifters, the Company's primary product, are used for scalping, grading and fines removal from dry, freeflowing powders and granular materials. We serve the cereal grain processors, mix plants, bakeries andsnack food producers, spice processors, and the pet food, chemicals and plastics, and mineral industries.

Design Engineering - Each of our sifters is engineered for the customer's specific application. Many
options are available that allow the sifters to be customized to meet their specific need.

Test Lab - We maintain a complete testing laboratory to evaluate
product samples and make equipment recommendations. There is nocharge or obligation for this service. Contact Great Western to discuss
testing requirements.

GF01

P. O. Box 149 • 2017 S. 4th Street
Leavenworth, KS 66048
P: 913-682-2291 • F: 913-682-1431
www.gwmfg.com • E: sifter@gwmfg.com

QA Series Gravity Flow Sifter Dimensions
QA36• Nominal Ø36" (Ø914 mm)• Net screen area 5 ft²/sieve(0.46 m²/sieve)• Models with 3 to 9 sieves• Net sieving area from 15
to 45 ft² (1.39 to 4.18 m²)• One - 1½ HP (1.1 kw)
motor with V-belt drive• Drive guards• Inlet support bracket andfloor stubs are optional• Tailings canister is optional

QA46• Nominal Ø46" (Ø1168 mm)• Net screen area 8.9 ft²/sieve(0.83 m²/sieve)• Models with 4 to 9 sieves• Net sieving area from 32
to 80 ft² (3.31 to 7.44 m²)• Two - 1½ HP (1.1 kw)
motors with V-belt drives• Drive guards• Inlet support bracket andfloor stubs are optional• Tailings canister is optional

Typical arrangements illustrated. Custom arrangements are also available.
Dimensions shown in inches (millimeters) are indicative and subject to change without notice.
Contact Great Western for detailed installation drawings.

GF01dimP. O. Box 149 • 2017 S. 4th Street
Leavenworth, KS 66048
P: 913-682-2291 • F: 913-682-1431
www.gwmfg.com • E: sifter@gwmfg.com