Manufacturer of sealing, fire protection and heat pump entry systems for buildings
DOYMA GmbH & Co
Oyten (DE) · Vienna (AT)New on Amplifa
About DOYMA
DOYMA GmbH & Co, based in Oyten near Bremen, is a manufacturer of sealing and fire protection systems for building penetrations with pipes and cables. The product range includes sealing systems (sealing inserts, liner pipes, annular space seals, cable penetrations), fire protection systems such as Curaflam collars and ZZ bulkhead systems, heat pump entries (DOYMAfix), single and multi-utility building entries (Quadro-Secura) as well as custom constructions for power plants, dams, airports and large industrial facilities. The systems protect buildings against water, fire and flue gas and operate in the core competence fields of civil engineering, building services and energy supply. Production takes place in Oyten on assembly lines with precision machines using materials such as fibre cement, plastics and stainless steel (V4A). With around 240 employees, the company supports projects from technical consulting through planning and manufacturing to installation via a network of service partners. The products are used in Europe and worldwide, with the revenue focus in the European market. A 25-year guarantee on the systems underlines the company's quality claim for permanently tight penetration technology.
- Site
- Oyten
- Processes
- Manufacture of sealing, fire protection and heat pump entry systems, Custom constructions and special productions of sealing systems, Manufacture of fire protection collars, annular space seals and building entries, Technical consulting (project support, product selection, standards conformity), Installation of pipe and cable penetrations and fire barriers by service partners, Technical consulting, Service partner/district manager on-site installation service, Custom constructions
- Materials
- Fibre cement, Plastic, Stainless steel (V4A), Steel (tinplate/blackplate in packaging), Steel, Expansion foam
- Certificates
- ISO 9001:2015, DVGW approval Quadro-Secura (DE), SVGW approval (CH), ÖVGW approval (AT), Interzero recycling certificate / system participation, ISO 9001, DVGW approval, SVGW approval, ÖVGW approval
- Employees
- approx. 240
- Industries
- Civil engineering, Building services, Energy supply, Power plants, Industrial facilities, Residential construction
- 01
Technical consulting and project support
- 02
Engineering and custom constructions
- 03
Manufacturing in Oyten (assembly lines, precision machines)
- 04
Quality inspection
- 05
Distribution via specialised trade
- 06
Installation on site by service partners
Materials and Processes
Fibre cement
Material for liner pipes of the first Dichtungs-Profi system and still a central component of the sealing systems.
Stainless steel (V4A)
Corrosion-resistant material for sealing systems at the Münchehofe wastewater treatment plant (Curaflex Quick In C).
Plastic
Used in flexible plastic pipes and cable protection pipe seals as well as in sealing and cartridge products.
Steel
Steel sheet (tinplate/blackplate) as packaging material for system components.
Expansion foam
Used for filling cavities in heat pump entries and annular space seals.
Locations
Oyten
DEHeadquarters, production, administration
- Materials
- Fibre cement, plastic, stainless steel (V4A), steel sheet
- Assembly lines
- Precision machines
Vienna
ATAustria office
Components and Systems
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of sealing, fire protection and heat pump entry systemsAssembly | – | – | – | – | Fibre cement, Plastic, Steel sheet, Expansion foam |
| Custom constructions and special productions of sealing systemsEngineering | – | – | – | – | – |
| Manufacture of fire protection collars, annular space seals and building entriesAssembly | – | – | – | – | – |
| Technical consulting (project support, product selection, standards conformity)Engineering | – | – | – | – | – |
| Installation of pipe and cable penetrations and fire barriers by service partnersAssembly | – | – | – | – | – |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Assembly lines | – | – | – | – | Oyten |
| Precision machines (production hall) | – | – | – | – | Oyten |
Additional services
Reference customers
Quality and Certification
DOYMA is certified according to DIN EN ISO 9001:2015 and subjects products and processes to regular checks, tests and optimisations. Approvals exist, among others, with DVGW (DE), SVGW (CH) and ÖVGW (AT); tests are carried out by institutes such as MFPA Leipzig, Fraunhofer/IFAM, MPA NRW, TZW as well as IBMB/MPA Braunschweig and MPA Stuttgart for fire protection usability certificates.
| Evidence | Oyten | Vienna |
|---|---|---|
| ISO 9001 | ||
| DVGW approval | ||
| SVGW approval | ||
| ÖVGW approval |
Company History
- 1967
Presentation of the first Dichtungs-Profi sealing systems (fibre cement liner pipe with sealing insert) by company founder Hans-Ullrich Ihlenfeldt at the ISH in Frankfurt.
- 2019
Company founder Hans-Ullrich Ihlenfeldt died on 12 December 2019.
- 2023
Managing partners Kerstin Ihlenfeldt-Wulfes and Tanja Kraas were awarded the 'Entrepreneur of the Year' prize by Sparkasse Bremen.