
Planning, construction and service of dosing systems and metering pumps for liquid media in industry.

Zelz Dosiertechnik GmbH
Werkstraße 20, 2522 Oberwaltersdorf · AustriaNew on Amplifa
About us
Zelz Dosiertechnik GmbH, based in Oberwaltersdorf, Lower Austria, has been active since 1992 in the planning and implementation of dosing systems as well as a supplier of metering pumps for liquid media. Founded by Jürgen Zelz as a sales representative for GRUNDFOS metering technology in Austria, the company was taken over in early 2017 by Dominik Sleiss and Werner Kummer. Its core competencies include project planning, installation and commissioning of dosing systems as well as the assembly of ready-to-connect dosing stations (Dosing Units). Since 2021, ZELZ has been a licensed sales partner of STÜBBE GmbH and offers an extended product range. Through its collaboration with Kummer Edelstahlpumpen GmbH, with which it shares a joint office, centrifugal, rotary lobe and screw pumps are also part of the offering. The fields of application range from the chemical industry through the paper and pulp industry and the food industry to water and wastewater treatment. The warehouse in Oberwaltersdorf stocks more than 100 metering pumps including accessories and spare parts.
- Site
- Oberwaltersdorf
- Processes
- Planning, implementation and installation of dosing systems, Supply of metering pumps for liquid media, Installation of metering pumps and ready-to-connect dosing stations, On-site maintenance service and repairs of metering pumps and dosing systems, Consultation, Project planning of dosing systems, Implementation and installation of dosing systems, Assembly into ready-to-connect dosing stations (Dosing Units)
- Materials
- PP/EPDM, PP/Viton, PVC/Viton, PVC/EPDM, PVC, PE, PTFE, PVDF
- Founded
- 1992
- Industries
- Chemical industry, Paper and pulp industry, Food industry, Water treatment, Wastewater treatment, Beverage industry
- 01
Consultation and inquiry
- 02
Project planning of the dosing system
- 03
Component selection and assembly into a dosing station
- 04
Installation and commissioning
- 05
On-site maintenance, repair and spare parts supply
Materials and Media Contact
PP/EPDM
Pump material combination used, among others, for DDE/DDC metering pumps in the 6, 9 and 15 l/h range.
PP/Viton
Used in metering pumps, among others the DDA and DME series in the medium performance range.
PVC/Viton
Material combination used, among others, for DDE 60-10 metering pumps in flocculant dosing.
PVC/EPDM
Used in DDE/DDA metering pumps in the 60 to 200 l/h range.
PVC
Material for dosing hoses and pump components in the warehouse program.
PE
Material for dosing hoses in the product range.
PTFE
Highly chemically resistant material for dosing hoses.
PVDF
Piping material used, among others, for a CIP application in a brewery.
PPES
Pump material used, among others, for DME 2 and DME 12 metering pumps.
AP-PP
Pump material used, among others, in a dust extraction application with DME 375-10.
Locations

Oberwaltersdorf
ATHead office with office, warehouse and assembly
- Materials
- PP/EPDM, PP/Viton, PVC/Viton, PVC/EPDM, PVDF, PPES
- GRUNDFOS metering pumps DDE, DDC, DDA, DME, DDI, DMX
- Warehouse with over 100 metering pumps, accessories and spare parts
Components and Parts




Inside the production



Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Planning, implementation and installation of dosing systemsEngineering | – | – | – | – | – |
| Supply of metering pumps for liquid mediaEngineering | – | – | – | – | – |
| Installation of metering pumps and ready-to-connect dosing stationsAssembly | – | – | – | – | – |
| On-site maintenance service and repairs of metering pumps and dosing systemsAssembly | – | – | – | – | – |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Metering pump DDE | GRUNDFOS DDE 60-10 AR-PVC/V; DDE/DDC 6/9/15 l/h; DDE 60/120/200 l/h | – | – | – | Oberwaltersdorf |
| Metering pump DDC | GRUNDFOS DDC 6-10 AR-PP/E | – | – | – | Oberwaltersdorf |
| Metering pump DDA | GRUNDFOS DDA 7,5-16; DDA 12-10; DDA 17-7; DDA 30; DDA 12-10 AR-PP/E; DDA 7,5-16 FC-PP/E | – | – | – | Oberwaltersdorf |
| Metering pump DME | GRUNDFOS DME 940-4; DME 60-10; DME 150-4; DME 375-10; DME 2; DME 12 | – | – | – | Oberwaltersdorf |
| Metering pump DDI | GRUNDFOS DDI 60-10 AR-PP/E; DDI 150-4 AR-PP/E | – | – | – | Oberwaltersdorf |
| Metering pump DMX | GRUNDFOS DMX 27-10 B-PVC/V | – | – | – | Oberwaltersdorf |
| Centrifugal pumps | Kummer Edelstahlpumpen GmbH | – | – | – | – |
| Rotary lobe pumps | Kummer Edelstahlpumpen GmbH | – | – | – | – |
| Screw pumps | Kummer Edelstahlpumpen GmbH | – | – | – | – |
| Metering pumps (stock) | – | over 100 | – | – | Oberwaltersdorf |
Additional services
Reference customers
History
- 1992
Founding of Zelz Dosiertechnik by Jürgen Zelz as a sales representative for GRUNDFOS metering technology in Austria.
- 2017
Takeover of the company by Dominik Sleiss and Werner Kummer; since then a shared office with Kummer Edelstahlpumpen GmbH.
- 2021
Partnership with STÜBBE GmbH; ZELZ Dosiertechnik becomes a licensed sales partner with an extended product range.