Dueker

Name

Dueker

Legal name

Düker GmbH

Website

https://dueker.de

Company type

Private

Operating status

Operating

Headcount range

101–250 employees

Ownership category

akta.pro rank

Product category

Water Infrastructure Manufacturing

NAICS

Industrial Valve Manufacturing (332911), Metal Valve Manufacturing (33291)

SIC

Steel Pipe & Tubes (3317)

akta.pro primary industry

Pipes & Tubing (Metal, Plastic & Composite) (IMADALAC)

Keywords

• Cast iron valves
• Water infrastructure products
• Ductile iron fittings
• Drainage pipe systems
• Wastewater lifting stations

Headquarters

HQ city

Karlstadt

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Industrial valve sales: Sale of flow control valves including gate valves (Absperrschieber), butterfly valves (Absperrklappe), hydrants, check valves (Rückflussverhinderer), ring piston valves (Ringkolbenventile), and air valves for water supply infrastructure
2. Ductile iron fittings sales: Sale of flange fittings (Flanschformstücke), socket fittings (Muffenformstücke), special fittings (Sonderformstücke), KS-fittings, and wastewater fittings for pipe network construction and renovation
3. Drainage pipe systems sales: Sale of cast iron drainage pipe systems including SML, MLK-protec, TML, MLB, and NH products for building drainage applications with various coating specifications
4. Custom casting services (Kundenguss): Individual cast iron solutions manufactured to customer specifications for applications beyond standard product range, utilizing experience in casting for water supply and drainage
5. Flow Control Service: Manufacturer-competent service for valves including maintenance, repair, and technical support for water and wastewater network operators throughout Germany

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Düker manufactures ductile and grey cast iron products for water supply and drainage infrastructure. The company offers three product divisions: Flow Control (gate valves, butterfly valves, hydrants, check valves, ring piston valves, control valves, and air release valves), Drainage (SML, MLK-protec, TML, MLB cast iron pipe systems with couplings and fire protection solutions), and Waste Water (STRATE wastewater pumping stations, check valves, and accessories). All products use proprietary Düker etec-Email enamel coating or epoxy coating for corrosion protection.

Product overview

Dueker (Düker) is a German manufacturer of water infrastructure solutions with over 555 years of history, offering three main product divisions: Flow Control (valves and fittings for water/gas supply), Drainage (cast iron pipe systems for building drainage), and Waste Water (STRATE brand technology). Flow Control products include gate valves (Absperrschieber types 2004/3004/4004/INFINITY), hydrants (types 304/305/494/495/496), butterfly valves, check valves (Düsenrückschlagventil 8015), ring plunger valves (7015), CLA-VAL control valves, and CSA air valves—all made from ductile cast iron with enamel (etec) or epoxy coating. Drainage products span SML standard pipes (DN 50-400), MLK-protec/KML for aggressive wastewater, TML for underground installation, MLB/BML for bridge drainage, and Düker NH per ASTM A888 standard, all complemented by Dükorapid couplings and fire protection systems. The STRATE brand handles wastewater lifting stations and accessories. Düker is the only German manufacturer of cast iron drainage pipes and offers custom casting services (Kundenguss) alongside CAD/BIM planning services and nationwide Flow Control service support.

Differentiator

Problem solved

Functional benefit

Brands

• STRATE: Wastewater technology brand with 75 years of experience, specializing in wastewater pump stations with patented separator systems, check valves, and ventilation valves for municipal and industrial wastewater applications.
• DÜKADEMY

Products and services

• Flow Control Valves (Armaturen) Comprehensive range of ductile cast iron flow control valves including gate valves, hydrants, butterfly valves, check valves, control valves, and air release valves with enamel or epoxy coating for water and gas supply networks.
• Absperrschieber (Gate Valves) - Types 2004, 3004, 4004, INFINITY Gate valves for drinking water, gas, and wastewater applications made from ductile cast iron with enamel or epoxy coating. Available with PE welding ends and as repair valves.
• Hydranten (Hydrants) - Types 304, 305, 494, 495, 496 Underground and above-ground hydrants for fire fighting and water extraction made from ductile cast iron with full enamel coating, available in DN 80-100 sizes.
• Absperrklappen (Butterfly Valves) - Type 424 Epoxy Line Butterfly valves for water supply pipelines available DN 100 to DN 3000 in PN 10, PN 16, and PN 25 pressure stages with double-eccentric disc design and various actuator options.
• Düsenrückschlagventil Typ 8015 (Nozzle Check Valve) Hydraulically optimized check valve for preventing backflow in water supply systems, DN 80 to DN 300 in PN 10/16/25 with CFD-optimized flow and EPDM-coated valve disc.
• Ringkolbenventil Typ 7015 (Ring Plunger Valve) Robust control valve for precise pressure and flow adjustment in water supply, DN 150, 200, 300 with PN 10-40 rating, push-crank gear, and cavitation protection.
• CLA-VAL Regelventile (Control Valves) Automatic control valves for pressure, flow, level, and pump control. Düker distributes CLA-VAL products exclusively in Germany, offering over 3,500 valve variants from DN 10 to DN 1400.
• CSA Be- und Entlüftungsventile (Air Release Valves) Air release and vacuum relief valves for water infrastructure protection, including combination valve FOX 3F-RFP and frost-protected underground valve SATURNO.
• Hausanschlussarmaturen (Service Connection Valves) Service connection valves Type 1004 for water and gas supply, including tapping saddles TOP/TOPsi and connection saddles, DN 25-50 with internal thread or PE connections.
• Ductile Iron Fittings (Druckrohrformstücke) Complete range of ductile iron pipe fittings including flange fittings, socket fittings, special fittings, KS-fittings for plastic pipes, and wastewater fittings per DIN EN 545 and DIN EN 598.
• SML Drainage Pipe System Cast iron drainage pipes and fittings per DIN EN 877 for building drainage with internal epoxy coating, external red-brown primer, sound insulation, fire resistance, and 100% recyclability. Düker is the only German manufacturer.
• MLK-protec/KML Pipes Cast iron drainage pipes with enhanced coating for aggressive and fatty wastewater from commercial kitchens. Internal ocher epoxy coating (min 240 µm) and external zinc coating (min 130 g/m²) plus top coat.
• TML Pipes

Quantifiable outcome

• 10-year warranty on all fully enameled valves and fittings
• +2 more outcomes

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• CLA-VALcoreChannel Partner/ Reseller/ DistributorDüker is the exclusive distribution and service partner for CLA-VAL products in Germany. CLA-VAL is a market leader offering over 3500 different valve variants in all sizes from DN 10 to DN 1400 for automatic control valves enabling precise pressure, flow, level, surge, and pump control. The partnership provides Düker customers access to comprehensive valve solutions for drinking water supply, industrial applications, and fire protection systems.
• STRATEcoreStrategic or Co-development PartnerSTRATE has been part of Düker's wastewater division for over 75 years, specializing in innovative wastewater technology. STRATE develops sewage pumping stations with patented separator systems, check valves, and air valves for municipal and industrial wastewater applications. The company also supplies check valves and start-up relief valves for blower and compressor manufacturers for air and technical gases.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Regional players

• Smith-Blair (Aegion): US-based manufacturer of pipe couplings, repair clamps, and fittings for water infrastructure. Comparable in fittings and couplings but focused on the North American market rather than Europe.

Broad incumbents

• Georg Fischer Piping Systems: Swiss multinational offering a broad piping systems portfolio for water, gas, and industrial applications. Overlaps with Düker in ductile iron and PE pipe systems as a larger, more diversified incumbent.

Direct peers

• VAG-Armaturen: German-headquartered manufacturer of valves, hydrants, and fittings for water and wastewater infrastructure. Closest like-for-like competitor in the German Flow Control segment that Düker addresses.
• AVK Group: Danish-owned manufacturer of valves, hydrants, and fittings for water, wastewater, and gas networks. Competes with Düker's gate valves, butterfly valves, and fittings across European municipal tenders.
• Saint-Gobain PAM: Global leader in ductile iron pipe and fittings for water and wastewater networks. Most direct competitor to Düker's ductile iron fittings and cast iron drainage pipe business across Europe.
• Hawle Armaturen: Family-owned German/Austrian manufacturer of valves and fittings for drinking water supply. Direct competitor in ductile iron fittings and service connection valves.
• ACO Passavant: German manufacturer of drainage systems for building, civil, and infrastructure applications. Direct competitor to Düker's Drainage division, particularly in cast iron and stainless drainage for commercial construction.
• Mueller Water Products: North American manufacturer of water infrastructure products including iron gate valves, hydrants, and pipe fittings. Comparable product portfolio though focused primarily on the US market.
• Erhard (Talbot Group): German manufacturer of water and wastewater valves, penstocks, and fittings. Competes head-to-head with Düker's Flow Control portfolio in DACH municipal markets.
• TALIS Group: European group of water valve and fitting brands (including Erhard and others). Competes with Düker across valves, hydrants, and fittings for water supply networks.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInde.linkedin.com/company/d%C3%BCker-gmbh

Compliance18 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dueker