Besser understands that quality concrete is the most critical component in the production process, and the quality of the concrete depends heavily upon the mixer. The Enhanced Single Shaft Batch Mixer (EM Mixer) is the latest in a complete line of mixers designed to help you meet your production goals. 

Improved mixing geometry and high speed are the two defining features of this mixer. Improved mixing geometry makes the EM Mixer ideal for the rapid production of dry cast products. A high speed homogeneous mix can be provided in 60–120 seconds, depending on material absorption factors.

Technical Service Tips

Brochure (Requires Acrobat Reader)

Standard Features

• The 93% efficient 3-stage planetary transmission utilizes a patented rare earth magnetic drive coupler, which replaces the soft starters and air or fluid clutches found on older models. The conductor and rotor operate with an air gap to fully isolate the motor from the load. This provides smooth, efficient power transfer as well as vibration isolation and overload protection.
  
  
• Mixers incorporate a fully welded uniframe, lateral throw-back mixing blades, a hydraulic discharge door and a hydraulic access door with safety lockout. 
  
  
• Hydraulically operated discharge gate with locking center pivot mechanism includes a Rhino-Hyde liner with an overlapping positive seal.
  
  
• Hydraulic power unit for discharge door, access door and clean-out gate contains solenoid control valves, flow controls, a breather/filler, an oil level sight gauge, a system pressure gauge and an oil filter. Valves are provided for the discharge gate and front access panel. 
  
  
• Discharge chute provided with polyurethane lining. 
  
  
• Labyrinth positive displacement shaft seals allow for superior dry cast production.
  
  
• A heavy-duty gearbox oil cooler ensures a long gearbox life. The gearbox cooling package includes a radiator, fan, lube circulation pump and a lube oil filter. The cooling unit is automatically controlled by a temperature switch.
  
  
• One-piece Ni-Hard abrasion resistant left and right hand mixer blades (ribbons) are standard. Replaceable Ni-Hard abrasion resistant shell liners are provided.
  
  
• 8" (203 mm) diameter main blade shaft has pillow block support bearings. A spherical roller bearing is used on the drive end of the mixer and a double tapered roller bearing is used on the slave end. Shaft flex couplers accommodate shaft deflection and extend bearing and seal life.
  
  
• 125 hp drive motor – TEFC – provided with adjustable mounting base (does not include motor starter; see options). 
  
  
• Double-hinged front access panel has a hydraulic cylinder actuator.
  
  
• Electric panel includes controls for the access door, gearbox cooler and discharge gate, plus an emergency stop pushbutton and lockable switch for control power.

Optional Enhancements

Ribbon Blades with Replaceable Liners
Eight Ni-Hard wear liners, attachment hardware and replaceable hardware protectors prevent excessive blade wear. 

Cleaning Rings and Blade Shaft Covers
This option includes four circular cleaning rings and two split covers for the blade shaft. The cleaning rings help prevent buildup of concrete on the shaft and the replaceable covers prevent shaft wear.

Motor Starter
Includes part winding motor starter in NEMA 1 enclosure for 460 V., 3 phase, 60 Hertz (other voltages are available). Also includes disconnect circuit breaker with lockable operating mechanism, thermal overload protection, and start-stop pushbuttons. Starter mounting, wire and conduit to motor are provided by the customer.

Hydraulically Operated Clean-Out Gate
A 12" x 16" (305 mm x 406 mm) hinged gate is located at the bottom center of the mixer shell. A latching hinge mechanism, hydraulic cylinder and mounting bracket, solenoid control valve with flow control, selector switch and all necessary wiring, plumbing and hardware are included. The clean-out gate is required for use with MixerWash.

MixerWash — Automatic High Pressure Washdown System
The MixerWash provides automatic clean-out of the inside of the mixer with high-pressure water spray. Two oscillating spray bars with multiple spray nozzles provide thorough washdown of all internal surfaces. A hand-held spray wand is provided for additional cleaning. MixerWash also includes a power unit to provide the necessary high pressure/high flow water supply.

MixerMind
MixerMind provides automatic diagnostic operation and service planning; it monitors motors, gearboxes and the automatic lubrication system for temperature, pressure and service.

Specifications

Front View (shown below)

Top View (shown below)