FLEXIBLE SHAFTLESS
SCREW CONVEYOR
A compact enclosed conveyor in which a motor-driven, open-centre flexible spiral rotates inside a tube to move powders and granules from a feed hopper to an elevated process point.
HOW THE SYSTEM WORKS
LOAD
Material enters the hopper above the lower spiral.
FILL
Product settles into the spiral flight spaces.
ROTATE
The geared drive turns the shaftiess spiral.
ADVANCE
Rotating flights push material through the tube.
LIFT
The enclosed tube carries material to elevation.
DISCHARGE
Product exits through the uppe outlet spout.
WHEN FLEXIBLE SCREW CONVEYING IS THE RIGHT CHOICE
PROCESS FIT
Free-flowing powders
Well suited to many dry powders, granules and blended ingredients.
Moderate throughput
A practical choice for continuous or batch feeding over short routes.
Dust containment
An enclosed tube limits product loss, exposure and housekeeping.
KEY ADVANTAGES
Compact installation
A small hopper footprint and inclined tube fit constrained process areas.
Simple product path
Few internal components support reliable operation and straightforward access.
Automation ready
Drive, hopper level, current and downstream permissives can connect to the PLC
CONSTRUCTION & CONFIGURATION OPTIONS
SPIRAL MOC
Spring steel or stainless spiral selected for product and duty
TUBE OPTIONS
Food-grade polymer tube or stainless outer tube where required
SPIRAL PROFILE
Round, flat or application-specific open-centre geometry
CONFIGURATION
Fixed or mobile hopper with inclined or near-horizontal routing
CLEANING
Dry clean-out, removable spiral, air purge or wash-compatible option
PROTECTION
Current overload, zero-speed, level and access safety interlocks
FLEXIBLE SHAFTLESS SCREW OPERATING CONCEPT
The lower end of an open-centre flexible spiral is flooded with product from the hopper. Rotation advances material through the enclosing tube and lifts it to the discharge, while the spiral flexes to suit a smooth inclined route.
CONTROLLED OPERATING SEQUENCE
LOAD
Charge product into the hopper.
FILL
Flood the lower spiral section.
ROTATE
Geared drive turns the spiral.
ADVANCE
Flights push produc upward.
DISCHARGE
Release at selected elevation.
CONTROL, PROTECTION & MAINTENANCE
Start-up permissive
Confirm downstream readiness before starting the spiral and product feed.
Current monitoring
Rising motor current can indicate overfill, compaction, blockage or product change.
Spiral protection
Correct speed, bend radius and empty-start logic protect the flexible spiral.
Discharge confirmation
Downstream equipment readiness is interlocked with conveyor operation.
Access protection
Inspection covers and drive guards are interlocked where required.
Cleaning access
Quick-release tube, hopper access and removable spiral support sanitation.
STANDARD CAPACITY & PRELIMINARY SIZING
Catalogue screening basis: free-flowing dry powder at 0.5 kg/L bulk density, controlled flooded inlet, continuous duty and straight conveying tube. Apply the inclination factor before selecting a model.
|
MODEL
|
TUBE ID
|
SPIRAL OD
|
TYPICAL SPEED
|
VOLUMETRIC CAPACITY
|
CAPACITY @ 0.5 kg/L
|
DUTY CLASS
|
|---|---|---|---|---|---|---|
|
FS-44
|
44 mm
|
35-40 mm
|
300-900 гpm
|
0.2-0.8 m3/h
|
0.1-0.4 t/h
|
Micro/dosing
|
|
FS-55
|
55 mm
|
44-50 mm
|
250-750 rpm
|
0.5-1.6 m3/h
|
0.25-0.8 t/h
|
Light duty
|
|
FS-67
|
67 mm
|
54-61 mm
|
200-650 rpm
|
1.2-4.0 m3/h
|
0.6-2.0 t/h
|
General
|
|
FS-80
|
80 mm
|
65-73 mm
|
180-550 rpm
|
2.5-8.0 m3/h
|
1.25-4.0 t/h
|
Medium
|
|
FS-90
|
90 mm
|
73-82 mm
|
160-500 гpm
|
4-12 m3/h
|
2-6 t/h
|
Bulk
|
|
FS-120
|
120 mm
|
98-110 mm
|
120-400 грm
|
8-24 m3/h
|
4-12 th
|
High duty
|
CAPACITY CALCULATION BASIS
INCLINATION CORRECTION
Qinclined = Qhorizontal x Ki
Ki guide: 15 deg 0.90 | 30 deg 0.75 | 45 deg 0.60
DENSITY CORRECTION
Qm = Qv x bulk density / 1000
Qm in t/h; Qv in m3/h; density in kg/m3
WHAT CONTROLS THE FINAL SELECTION
Material behaviour
Flowability, fragility, abrasion, moisture and temperature.
Tube & spiral geometry
Clearance, spiral diameter, pitch, section and tube material.
Speed & drive
Required throughput, starting torque, VFD range and motor service factor.
Route & incline
Length, lift, angle, smooth bend radius and discharge elevation.
Loading consistency
Controlled hopper flow avoids starvation, compaction and overload.
Cleaning & safety
Removability, clean-out method, guarding, earthing and dust hazards.
FINAL ENGINEERING CHECK
Confirm material and capacity
Approve route and inclination
Select tube and spiral profile
Calculate speed and drive
Agree trial/FAT criteria
Need the Right FLEXIBLE SHAFTLESS SCREW CONVEYOR
for Your Process?
Our engineers will help you select, size and configure the ideal system for your application.
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