The document describes Loesche's new Sandwich Sealing System feeding approach. It combines simple, compact, and low-wear design with continuous feeding and easy maintenance. The system seals with a belt and housing to reduce leaks and issues of previous flap gate and rotary feeder methods. It provides benefits like lower wear, easy installation and maintenance, guaranteed sealing and feeding, and is patented. The system reduces operational costs by around 70% compared to rotary feeders.

1. My
My
SANDWICH SEALING SYSTEM
PROVEN TECHNOLOGY TRANSFORMED INTO NEW FEEDING APPROACH

2. Throughout the last decades Loesche has constantly implemented new
feeding systems into their plants.
Flap gates were state of the art for many years though the disadvantages such
as oil leakages and false air forced new developments. Nowadays rotary feeders can
be considered as the standard equipment worldwide. Following Loesche s slogan of
innovative engineering our approach is a solution that combines the following
characteristics
• As simple as possible
• A reduction of wear rate to a minimum –especially for C/S mills
• A reduction of heavy steel parts
• As compact as possible
• Easy maintenance
• continuous feeding must be guaranteed
The result is the recently patented Sandwich Sealing System.
Introduction
Production
Efficiency Availability
Benefits
• Reduction of wear rate
• Easy maintenance
• Proper air sealing and continuous
feeding guaranteed
• Easy implementation into existing
plant environment
• Patented solution
Installation / Commissioning
2-3 days
Return on invest
< 1Years

3. IntroductionDevelopment Growth Maturity Saturation Degeneration Elimination
Sandwich Sealing
Rotary Feeder
Flap gates
• Sealing housing
• Belt *)
• Support frame with
side/pressing rollers
• Return drum for cover belt
• Drive
*) = valid for temperatures of max. 200 °C
for feeding material temp.
New Sealing
Housing
Sealing Material
with cover beltFlanged and sealed
bearing to be foreseen in
new sealing housing
Sealing
Returning belt
Sealing housing
depending on existing
belt conveyour
Sealing of protruding
design elements
Product lifecycle of feeding technologies implemented by Loesche over the years
Scope of supply

4. Estimated savings for operational
costs at 70 %
Rotary feeder Sandwich Sealing
Solution
OPEX
Needed parts
Type of feeding Wear parts Spare parts
Rotary feeder
Wheel, shaft,
lining, etc.
Housing, bearings, brackets,
caps, etc.
Sandwich Sealing
Solution
Belt bearings, pressing/side rollers
For further information such as detailed
scope of supply and quotations the
Customer Service Sales department can
be contacted under:
LOESCHE GmbH
– Customer Service Sales –
Hansaallee 243
D-40549 Düsseldorf, Germany
Phone +49 - 211 - 5353 - 0
Fax +49 - 211 - 5353 - 500
Email customerservice@loesche.de
www.loesche.com
€
€
Summary – reduction of operational costs