Helixes and Nozzles - Schenck AccuRate

Helixes and Nozzles
Helixes that handle cohesive or
adhesive materials
Sanitary pharmaceutical grade
helixes available
Nozzles with cross wires for
minimizing material pulsations
Adaptations for complete
material discharge
Application
Helixes and nozzles designed for:
Handling pellets, beads, and
irregular materials
Feeding cohesive/adhesive materials
such as TiO2, Zinc Oxide,
and Iron Oxide
Low feed rates
Friable materials
Floodable materials
Batching applications
Abrasive materials
Spreading applications
Operating principle
Selecting the correct helix (screw, auger, etc.) and nozzle
is critical to the performance of any dry material feeder.
Over the last 40 years, Schenck Process has used
application and lab-based experiences with more than
9,000 materials to develop an array of individual helixes,
nozzles and specific combinations that have been fieldproven
to offer the best metering possible.
Current configurations include the use of 304, 316 and
316L stainless steel as well as various coatings, which can
extend helix and nozzle life and reduce material build up.
A wide variety of helixes and nozzles are available for handling
adhesive/cohesive, floodable and irregularly sized
materials. Special custom designs are also available.
Our staff of sales applications engineers are standing
by to discuss your specific application and the helix and
nozzle combination that is best for your feeding process.
Give them a call today.
BV-D5083GB

Helixes
1. Full Pitch Open Flight Helix – A standard helix
used for most applications. The helix pitch equals
the diameter of the helix.
6. Full Pitch Open Flight Helix with End Stub –
Used with an over size nozzle with end bushing on pellets,
beads, and irregular materials. Provides a clearance
between the helix and nozzle adapter to prevent binding.
2. Half Pitch Open Flight Helix – Used when you
need the larger diameter flights to get cohesive
materials to drop into the flights, but has reduced
output compared to a full pitch open flight helix. The
helix pitch is one half the size of the helix diameter.
7. Full Pitch Helix with Center Rod – The center
rod is used for added strength in smaller diameter
helixes and to reduce possible flooding. Cannot be
used with adhesive/cohesive materials.
3. Double Pitch Open Flight Helix – The increased
spacing between the flights promotes filling of the
flights on very cohesive materials. The helix pitch
is two times the size of the helix diameter.
8. Machined Polyethylene Helix with Center Rod –
For materials that cannot come into contact with
metal or for applications that do not allow metal-tometal
contact.
4. Double Open Flight Helix – Helix has two discharge
flights and is used in batching applications
to reduce the deviation caused when the flight stops
and a small amount of material drops off the end.
9. Full Pitch Open Flight Helix with Stirring
Rods – Promotes flight filling of smaller diameter
helixes on light density materials that do not easily
fill the flights.
5. Knife-Edged Open Flight Helix – Used with a
tight fit poly nozzle adapter for adhesive/cohesive
materials such as TiO2, Zinc Oxide, and Iron Oxide.
The helix continuously cleans the nozzle walls to
prevent material build up.
10. Machined Sanitary Full Pitch Helix with Center Rod –
Polished, machined, stainless steel bar stock that is
typically used for food and pharmaceutical applications.
Other Helixes Are Available:
Contact our Sales Application Engineers
for further details.
11. Twin Screw Helix – Excellent for adhesive/
cohesive materials like TiO2 and Calcium Carbonate.
The reduction of material build up and pulsing
is also realized with a twin screw system.

Nozzles
12. Stainless Nozzle – A standard nozzle used in
most applications.
16. Nozzle with End Screen/Cross Wires – The screen
or cross wires are used to break up the material as it
comes out of the nozzle. Used in continuous or batching
applications for reducing deviations by not allowing
the material to “extrude” out the end of the nozzle. The
nozzle also minimizes material pulsations by providing
back pressure, which promotes fuller flights.
13. Poly Nozzle – Used in applications where materials
cannot come into contact with metal. A tight
fit version of the nozzle with a knife-edge helix is
available for feeding adhesive/cohesive materials.
17. Vinyl Nozzle – For adhesive/cohesive materials
that have a wide range of particle size distribution or
materials that cannot come into contact with metal.
14. Nozzle with End Bushing – Primarily utilized with
an end stub helix for pellet, bead, and irregular shaped
material feeding applications. The design provides
clearance between the helix and nozzle adapter to
prevent binding.
18. Side Discharge Nozzle – Used for free flowing
materials. For batching applications the nozzle
offers a positive material flow cut off reducing
deviations. Provides back pressure for promoting
fuller flights.
15. Total Hopper Cleanout Nozzle – Typically used
in sanitary applications for the food and pharmaceutical
industries. The nozzle allows complete
material discharge minimizing residual material left
in the feeder.
19. Spreading Nozzle – Discharges a curtain of
material across a given width. Typically used in
applications where spreading materials across a
belt or on to a tumble drum is required.
Other Nozzles Are Available: Contact our Sales Application Engineers for further details.
NOTE: All helix and nozzle configurations are subject to change.
Please contact our sales department for the design that meets your application needs.