Central conveying

With the patent pending SilentLine double walled material feedlines, motan offers three benefits to pneumatic conveying in one product:

• A dramatic reduction in noise while conveying raw material.
  SilentLine is a double-walled construction of two material lines. The inner pipe is used for conveying your materials. The air-filled space between the inner and outer pipes acts as insulation. This deadens the sound and protects your employees in the process. SilentLine reduces noise levels by a minimum of 12 dB. This is a decrease of more than 50%!
• An automatic detection of vacuum loss in the conveying system.
  SilentLine is the only product of its kind on the market which offers vacuum loss detection within the material lines. Using an external flow meter, you can detect any leaks immediately and that particular pipe can be exchanged without problem.
• Prevention of heat loss when conveying dried materials with hot dry air. SilentLine works like a layer of insulation. The air-filled space in the double-walled pipe lines decreases the amount of heat lost to the ambient atmosphere and your dried material cools less quickly during conveying.

With conventional raw material conveying systems where material needs to be conveyed over different distances at a constant blower vacuum you can experience the following effects:

• increased wear and tear of pipes and equipment
• degradation of the raw material
• increased dust production and/or angel hair
• excessive energy consumption
• poor efficiency of the entire system

All these points are eliminated by using IntelliFlow! With IntelliFlow air velocity control, by controlling the frequency of the blower your material conveying speed can be individually adjusted for every hopper loader and every conveying distance.

For moderate distance conveying applications, nothing beats the simplicity of a side-channel vacuum blower. motan blowers utilize a one-piece fan and side-channel unit to produce reliable vacuum power and can be frequency controlled. The simple, quiet compact design allows the pump to be installed in the production hall if required.

High efficiency, claw style positive displacement pumps provide the highest level of vacuum power available for conveying plastic material. The variable frequency pumps employ an advanced claw-shaped lobe design that cuts through and pressurizes air in a nearly maintenance free package. These pumps deliver stronger conveying performance at longer distances and higher elevations for challenging conveying applications.

The vacuum source is the heart of a centralised raw materials conveying system. That is why motan offers stand-by blowers or pumps. Should your blower/pump fail, then the control will automatically switchover to a stand-by, without any downtime to your production.

The METRO F30 central dust filter offers you efficient filtering for small to medium throughput conveying systems. The F30 is cleaned through implosion and allows dust filtration to take place at the floor level. An airtight dust collection bin makes the removal of fines quick and easy.

The METRO F50 central dust filter offers you more efficient filtering with high throughput conveying systems. The benefits to you are:

• Lower surface load of filter for larger blowers
• Good filter cleaning through implosion
• Low maintenance

A material discharge valve fitted below the dust collection filter allows the dust collection container to be emptied even during material conveying. A limit switch prevents the valve from opening during cleaning. The transparent dust collection bin allows you to check the dust level in the bin at any time. An additional benefit is that you can make a simple quality control check of raw material batches (dust content, angel hair, etc.)

When conveying very abrasive materials, for example glass-reinforced polyamides, it is important that the conveying system is designed to with stand wear. One solution is to use glass material feed lines and bends. motan glass bends are PU coated and earthed –making them shatter proof and eliminating the danger of static.

Dry air conveying is essential for hygroscopic materials that reabsorb moisture quickly. Conveying is carried out in a closed loop and dry warm air is used for transporting the material to the processing machine - maintaining material temperature and eliminating reabsorption of moisture.

After each conveying cycle it is possible to thoroughly the purge the material feed lines of any material, this is essential for:

• the conveying of hygroscopic materials
• for fast and trouble-free material changes
• preventing line plugging in long vertical line segments This is normally done with motan no-dead-space suction box made of stainless steel with the integrated purge valve.

Several different levels of automation are available for controlling a conveying system:

SELVAC 2: tried-and-tested electronic control.

METROnet S: a soft PLC conveying control for standard conveying systems.

METROnet AE and AN: the ultimate networkable system toolkit for complex conveying systems with either a soft PLC or Siemens S7 PLC with WEBpanel and decentralised CANBus nodes for the connection of peripheral equipment.

All METROnet controls are totally integrated in the CONTROLnet platform and can be linked to other controls via Ethernet.