Metering, weighing and conveying technology as well as complete systems for bulk materials and powdery raw materials – specialised since 1867.
HEINRICH WELB & SÖHNE Dosier- und Verwiegetechnik GmbH
Mühlheim am MainNew on Amplifa
About Heinrich Welb & Söhne
HEINRICH WELB & SÖHNE Dosier- und Verwiegetechnik GmbH is a family company founded in 1867, now in its fifth generation, headquartered in Mühlheim am Main. The company manufactures metering, weighing and conveying technology as well as complete metering and weighing systems for powdery and liquid raw materials of every kind, size, consistency and nature. The portfolio includes screw conveyors, bucket elevators, belt conveyors and Flexowell conveyors, rotary valves, flat slide gates and segment gates, box feeders, small-component dosers, mobile aggregate scales, weigh belts and BIG-BAG handling systems. Products are manufactured as welded sheet-metal and structural steel constructions, also in stainless steel and aluminium on request; for wear-exposed parts, materials such as Hardox 500, PE1000, rubber and Vulkolan are used. The range of services includes engineering with CAD design, flow diagrams and construction supervision as well as installation, maintenance, conversion and spare parts service. Customers include, among others, international plant engineering, the autoclaved aerated concrete industry, the food sector and the non-metallic minerals industry.
- Site
- Mühlheim am Main
- Processes
- Plant engineering (metering and weighing systems, processing plants), Metering technology (dosing and volumetric measurement, small-component dosers), Screw conveyors (pipe and trough screw conveyors), Screw conveyor conveying capacities, Bucket elevators type GBW, Belt conveyors and Flexowell conveyors, Weighing technology (mobile aggregate scales type ZV4, weigh belts, container scales,, BIG-BAG handling (discharge, filling, transport)
- Materials
- Steel (sheet and structural steel construction, welded steel construction), Stainless steel, Aluminium, Hardox (wear protection, e.g. Hardox 500), PE1000, Rubber (lining, belts, sealing strips), Felt (sealing strips), Vulkolan (sealing strips)
- Certificates
- Intensive manufacturing inspection, Tests in test rig
- Founded
- 1867
- Industries
- international plant engineering, autoclaved aerated concrete industry, food industry, non-metallic minerals (Steine/Erden), food sector
- 01
Engineering (system concepts, flow diagrams, design)
- 02
Manufacturing (welded steel/stainless steel/aluminium construction)
- 03
Installation (including silo and structural steel erection)
- 04
Maintenance, repair and conversion
- 05
Spare parts service
Materials and Manufacturing
Steel (sheet and structural steel)
Base material for welded bulk-material system components such as screw conveyors, rotary valves and bucket elevators.
Stainless steel
For metering technology, weighing technology and system components with corrosion protection requirements, e.g. in the food sector.
Aluminium
Material option for flat slide gates and silo emergency shut-offs.
Hardox 500
Wear protection for impact surfaces of box feeders and screw conveyor flights when handling abrasive materials.
PE1000 (PE-UHMW)
Plastic lining as wear protection on impact surfaces of box feeders.
Rubber
Lining of impact surfaces as well as belts and sealing strips on conveying equipment and gates.
Vulkolan
Sealing strip material for flat slide gates and rotary valves.
Felt
Sealing strips for gate plates and rotor seals of rotary valves.
Locations
Mühlheim am Main
DEHeadquarters with manufacturing and engineering
- Materials
- Steel, stainless steel, aluminium, Hardox, PE1000, rubber
- CAD design
- Test rig for conveyed material testing
- Welded construction manufacturing
Components and System Parts
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Plant engineering (metering and weighing systems, processing plants)Engineering | – | – | – | – | Steel, Stainless steel |
| Metering technology (dosing and volumetric measurement, small-component dosers)Engineering | – | – | – | – | Steel, Stainless steel, Aluminium |
| Screw conveyors (pipe and trough screw conveyors)Engineering | – | – | – | – | Steel, Stainless steel, Hardox 500 |
| Screw conveyor conveying capacitiesEngineering | – | – | up to over 200 m³/h | – | Steel, Stainless steel |
| Bucket elevators type GBWEngineering | – | – | 5 m³/h to 180 m³/h | – | Steel |
| Belt conveyors and Flexowell conveyorsEngineering | – | – | – | – | Steel, Rubber |
| Weighing technology (mobile aggregate scales type ZV4, weigh belts, container scales,Engineering | – | – | – | – | Steel, Stainless steel |
| BIG-BAG handling (discharge, filling, transport)Engineering | – | – | – | – | – |
| Flat slide gates and silo emergency shut-offs (manufacturing)Engineering | – | – | – | – | Steel, Stainless steel, Aluminium |
| Segment gates (electropneumatically actuated, welded construction)Engineering | – | – | – | – | Steel, Stainless steel |
| Rotary valves type ZD (1 m³/h to 150 m³/h)Engineering | – | – | 1 m³/h to 150 m³/h | – | Steel, Stainless steel |
| Box feeders (manufacturing)Engineering | – | – | – | – | Steel, Hardox, PE1000, Rubber |
| Engineering (CAD, system concepts, flow diagrams, design, documentation, construction supervision)Engineering | – | – | – | – | – |
| Installation (including silo erection, structural steel erection)Installation | – | – | – | – | – |
| Maintenance, repair, spare parts service, conversion of machines and systemsInstallation | – | – | – | – | – |
Additional services
Quality
Processing quality is ensured through intensive inspection during manufacturing. For materials that are difficult to convey, tests are carried out in an in-house test rig.
| Evidence | Mühlheim am Main |
|---|---|
| Intensive manufacturing inspection | |
| Tests in test rig |
History
- 1867
Founded by Heinrich Welb in Frankfurt am Main with a focus on scale manufacturing; the first scale was considered a pioneering achievement.
Expansion of scale manufacturing to include plant engineering; scale manufacturing remains the heart of the company.
Family company in its fifth generation, headquartered in Mühlheim am Main.