The Duravant family of operating companies serve the food processing, packaging and material handling segments.

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Key Specs
Features
Options
Production Rate
  • 75 loads per hour
Machine Dimensions
  • 114 " L x
  • 108 " W x
  • 154 " H
Minimum Load Size
  • 30 " L x
  • 30 " W x
  • 30 " H
Maximum Load Size
  • 48 " L x
  • 40 " W x
  • 80 " H
Load Weight
  • 5000 lbs
  • 6000 lbs
Approximate Shipping Weight
  • 11500 lbs
Electrical Requirements
  • 230 V /
  • 3 ph /
  • 60 Hz
  • 20 A
Pneumatic Requirements
  • 3 cfm @
  • 80 psi
Controls
  • Allen Bradley SLC 5/03 PLC (Field I/O on ASI open protocol)
  • Allen Bradley variable frequency drives 230 VAC
  • 24V control system
  • Current overload protection
  • NEMA 4/12 control cabinet with quick disconnect
  • Auto-height sensing photoeye with on/off mode
  • Power on/off lockable switch and indicator light
  • 1 E-STOP mushroom type push button on the operator console
  • Allen Bradley monochrome Touch Panel
  • Variable rotary ring speed 25 RPM
  • Separate up and down carriage speed
  • Separate top and bottom wrap selectors (0-9)
  • Banding selector (0-9)
  • Home position controlled by proximity sensor
  • Film force to load control
  • Lifting frame over travel limit switches
  • Alarm beacon light
  • Manual function for rotation fwd/rev, ring up/down
  • All conveyor fwd/rev
  • Re-wrap function
  • Intuitive alarm diagnostic on touch screen
  • Reset function
  • Air pressure switch
  • Non proprietary parts
  • 120 VAC outlet in control panel for service work
Film Delivery System
  • 20" NO-THREAD® Powered Pre-Stretch Carriage
  • Tilting film mandrel for ease of film loading
  • AC motor with Allen Bradley variable frequency drive
  • 50-300% pre-stretch ratio (preset to customer spec, Std 200%)
  • Electronic film tension control with analog sensor
  • Film force release for easy pull at start and end of cycle
  • Sensing device for film out/broken with visual alarm
  • Wireless technology for interference free operation
Film Tail Treatment
  • Automatic pneumatic film clamping
  • Pulse-controlled cutter
  • Film alignment arm & brush on film tail treatment
Ring Rotation Drive
  • 2 HP AC motor with Allen Bradley variable frequency drive
  • Electromechanical brake
  • 25 RPM variable speed
  • Belt driven
Ring Frame
  • 72" interior / 106" outside diameter including carriage
  • Steel frame construction
  • Supported by polyurethne bearings for smooth and quiet operation
  • Upper and lower ring limit position
Frame Construction
  • Welded structural steel construction
  • Free standing integrated leg design
  • Heavy duty safety fencing with an interlocked access door enclosing the wrapping zone
  • Easy access to all components
Conveyor
  • 1 x 11.5' process powered roller conveyor section
Technical Information
  • The machine is provided with a manual including: Electro/mechanical schematics and drawings; Trouble shooting guide; Installation instructions
  • Wulftec was the first in North America to put AC variable frequency drives as standard equipment on all machines. Why? Lower maintenance and better reliability—Wulftec stretch wrappers will save time and money
  • NEMA 4/12 control panel dust tight and waterproof
  • The control panel is neatly organized eliminating time otherwise lost searching for wires
  • The control panel is UL508A approved
  • Superior Electrical/Electronic Design including Allen Bradley CompactLogix PLC and AC drives
  • User friendly touch screen offers a simple yet effective way to adjust and maintain your equipment
  • All motors, proximity sensors, photoeyes and other sensors have quick disconnect cables that simplify installation and maintenance
  • All Wulftec structures are made of heavy-duty steel for rugged performance, even in the harshest work environments. They’re built to last forever
  • 4-legged design for maximum stability at high speed
  • Our heavy duty conveyors are second to none in the industry
  • The “Maintenance Free” spring loaded carriage gate equipped with spring loaded rollers, ensures optimal contact with the stretch film year after year, without involving maintenance
  • Wulftec is the only manufacturer to offer a LIFETIME warranty on its pre-stretch rollers’ blue compound.
  • Preset pre-stretch ratios are available from 50-300%
  • The angled carriage with very low wrap possibility, the product is properly secured to the pallet, resulting in a pallet that is more stable for transport, and therefore less damage
  • No film threading is required and a Lexan cover eliminates operator’s ability to reach rollers when gate is closed
  • The pneumatically operated cut and wipe-on system automatically cuts and wipes the film onto the load upon cycle end
    • A vertical roller positions the film over the clamp which grabs the film; this ensures longer heat wire life expectancy
    • Then the heat wire swings in and cuts the film
    • A timed impulse heat control, allows quick cool down so the heat wire becomes cold to the touch within 5 seconds
  • Wulftec’s revolutionary drop away clamp ensures clean film release from the pallet load
  • Non-Proprietary parts accessible on a local base
  • The best warranties in the industry
    • 3-year unlimited cycle warranty
    • lifetime warranty on prestretch rollers
    • 10-years on the steel structure

Product Description

The WRING-250 model is a fully conveyorized automatic ring machine as the ideal stretchwrapping solution for your unique needs. Expect to improve productivity, operator efficiency while reducing film and labor costs.

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