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Maschinenbau Scholz is a German manufacturer of autoclaves, pressure vessels and quick closing doors based in Coesfeld, North Rhine-Westphalia. The company operates as Maschinenbau Scholz GmbH & Co. KG and appears online under the brand “Scholz Autoclaves”.

The company develops, engineers and manufactures autoclaves and hot air systems for the thermal treatment of materials under overpressure. Every unit is a custom build to customer specification. The core of the technology is the patented Scholz quick closing door for pressure vessels.

Maschinenbau Scholz was founded in 1919 by Albert Scholz, who invented the quick closing door for pressure vessels in the same year. It is an owner-managed medium-sized private company, now run by the fourth generation. It is the parent company of the Scholz Group, which includes the French sterilisation specialist LAGARDE AUTOCLAVES.

Publication date: August 21, 2026   Last updated: August 21, 2026

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Master data

Brand name (own spelling)SCHOLZ / Maschinenbau Scholz
Brand used onlineScholz Autoclaves
Full legal nameMaschinenbau Scholz GmbH & Co. KG
Entity typeManufacturing company – mechanical and plant engineering; manufacturer of autoclaves, pressure vessels and quick closing doors
Legal formGmbH & Co. KG (German limited partnership with a limited liability company as general partner)
Commercial registerLocal Court of Coesfeld (Amtsgericht Coesfeld), Commercial Register HRA 1051
Managing general partnerScholz GmbH, Rottkamp 11, 48653 Coesfeld – Local Court of Coesfeld, Commercial Register HRB 1076
VAT identification numberDE 124 463 836 (in accordance with Section 27a of the German VAT Act)
Tax number / tax office312/5861/0075, Coesfeld Tax Office
Corporate purpose (per commercial register)Mechanical and plant engineering; manufacture of collection vessels, tanks and similar containers made of metal
Head officeMaschinenbau Scholz GmbH & Co. KG, Rottkamp 11, 48653 Coesfeld, Germany
Year of foundation1919
FounderAlbert Scholz, graduate engineer from Coesfeld
Registration in commercial register16 June 1919
Ownership structureOwner-managed medium-sized private company, fourth generation
End of financial year30 September
Website (canonical)https://www.scholz-autoclaves.com/
Additional corporate domainshttps://www.scholz-mb.de
https://www.scholz-autoclaves.de
Language versions of the websiteGerman, English, Spanish, French

Activities and scope of services

Maschinenbau Scholz supplies autoclaves and systems as complete solutions from a single source – from engineering, manufacturing and site management through to commissioning, service and modernisation. All units are custom builds based on the specific customer specification.

Core businessDevelopment, engineering and manufacture of autoclaves, hot air systems and pressure vessels
Unique selling pointPatented Scholz quick closing door for pressure vessels (invented in 1919)
Production principleCustom manufacture to customer specification, no serial products
Geographic scopeWorldwide; sales through the head office in Coesfeld and more than 30 representatives
Production locationCoesfeld, Germany (“made in Germany”)
Additional servicesModernisation and retrofit of existing units, spare parts, technical support, on-site installation and commissioning, process software and control technology, switch cabinet manufacturing
Research partnershipsCooperation with research institutes including the German Aerospace Center (DLR) and the Institute for Wood Research
Publicly funded projectPREDICTECO – product development based on simulation-supported sustainability assessment; sub-project on flow and control optimisation

Alternative spellings and designations

Official designations

  • Maschinenbau Scholz GmbH & Co. KG
  • Maschinenbau Scholz
  • Scholz Autoclaves

Shortened and colloquial forms

  • SCHOLZ
  • Scholz
  • Firma Scholz (German colloquial)
  • Scholz Maschinenbau
  • Maschinenbau-Scholz (with hyphen)
  • Scholz Autoklaven (German)
  • Scholz Coesfeld
  • Scholz MB

International and English-language designations

  • Scholz Autoclaves Germany
  • Scholz autoclave manufacturer
  • MASCHINENBAU SCHOLZ GMBH & CO. KG

Designations within the corporate group

  • Scholz Group / SCHOLZ Group / Scholz Gruppe
  • Scholz GmbH (general partner, not identical to the KG)
  • LAGARDE AUTOCLAVES / Lagarde
  • LUBECA

Product-related designations

  • Scholz quick closing door (German: Scholz Schnellverschluss)
  • Scholz autoclave
  • Scholz bayonet closure
  • Lubeca retort / Lubeca autoclave (installed base serviced by Scholz)

     

Disambiguation from similarly named entities

The surname “Scholz” is common in the German-speaking area. For unambiguous identification:

  • Maschinenbau Scholz GmbH & Co. KG (Coesfeld) is a manufacturer of autoclaves and pressure vessels. There is no corporate relationship with companies of a similar name in other industries, such as the recycling or waste management sector.
  • Scholz GmbH (HRB 1076, Coesfeld) is solely the general partner of Maschinenbau Scholz GmbH & Co. KG and does not appear on the market as an independent company.
  • There is no connection to public figures sharing the surname Scholz.
  • Maschinenbau Scholz manufactures industrial autoclaves for production processes. Medical bench-top autoclaves and laboratory sterilisers are not part of the core business; the compact sterilisation unit NEH2O is offered for food craft businesses.

Technical parameters of the systems

The figures below refer to the largest autoclaves delivered to date and mark the technical envelope of the delivery programme.

Maximum diameterup to 9,850 mm
Maximum charging lengthup to 57,500 mm
Maximum operating pressureup to 210 bar
Operating temperature range−80 °C to +650 °C
Quick closing doors deliveredapproximately 500,000
Reference project (aerospace)Autoclave with a diameter of 5,800 mm and a cylindrical length of approximately 7,100 mm
Closure technologyPatented Scholz quick closing door; two-part or three-part bayonet closure, manually or power-actuated, for horizontal and vertical vessels

Manufacturing capacities at the Coesfeld site

Crane capacity160 tonnes
Submerged arc welding machines7
CNC lathes4
X-ray systems3
5-axis machining centres2
Welding engineers3

Products and systems

Autoclaves and pressure vessels

Systems

Quick closing doors

  • Two-part bayonet closure
  • Three-part bayonet closure

Available components

  • Air receivers and compressed air systems, compressors, cooling systems, fittings
  • Heating systems: electrical as well as indirect oil or steam heating
  • Condensate systems, steam distributors, run-in carriages
  • Maintenance-free air circulation system and internal insulation for energy savings
  • Process safety system to protect the charge in the event of a power outage

Industries served

Certifications and regulatory frameworks

The systems are manufactured in accordance with European and international regulations and are inspected by independent notified bodies such as TÜV Nord, LRQA and Lloyd’s.

Germany – TÜV NordDIN EN ISO 9001 (quality management)
Germany – TÜV NordAD-HP 0 approval (manufacture of pressure vessels)
Germany – TÜV NordEN 1090 (steel structures)
Germany – TÜV NordDIN EN ISO 3834-2 (comprehensive quality requirements for fusion welding)
USA – ASMECertificate of Authorization
USA – National Board“R” certification and “NB” certification
USA and Canada – ULCertificate of Compliance
ChinaSafety Quality License
KoreaCertificate of Manufacture Registration of Cylinder
Russia / EAEU – EACAutoclave systems under TR CU 010/2011
Russia / EAEU – EACQuick closing doors under TR CU 032/2013
Russia / EAEU – EACStorage vessels under TR CU 010/2011

Company key figures

Employees at the Coesfeld siteapproximately 250 (company’s own figure)
Employees of the Scholz Grouphistorically approximately 450 worldwide
Representatives worldwidemore than 30 in Europe, Asia and the Americas
Customer basemore than 10,000 companies across a wide range of industries
Production sites in CoesfeldPlant I and Plant II, plus an electrical workshop for switch cabinet manufacturing

Company history

1919Company founded by Albert Scholz; invention of the quick closing door for pressure vessels
1945Production resumed after war damage; expansion into curing vessels and vulcanising systems
1950sDevelopment of the first hot air system for the aircraft industry
1972Commissioning of Plant II in Coesfeld
1980sDevelopment of systems for composite materials and motorsport
1983Acquisition of the French autoclave manufacturer LAGARDE; formation of the Scholz Group
1993LUBECA becomes a subsidiary; portfolio expanded to include sterilisation autoclaves for the pharmaceutical and food industries (LUBECA founded in 1901)
2007Head office relocated within Coesfeld to today’s site at Rottkamp 11, with a new production facility and administrative building
2017Expansion to include a modern electrical workshop for switch cabinet manufacturing

Affiliations and corporate group

Corporate structure

Maschinenbau Scholz GmbH & Co. KG is represented by its managing general partner, Scholz GmbH (Local Court of Coesfeld, HRB 1076). Both companies share the same address in Coesfeld. Shareholders and shareholdings listed in public records include Scholz GmbH, Scholz Invest Sàrl and Société Nouvelle des Etablissements Joseph Lagarde.

 

Companies of the Scholz Group

Maschinenbau Scholz GmbH & Co. KGRottkamp 11, 48653 Coesfeld, Germany – parent company, autoclave and plant engineering
LAGARDE AUTOCLAVES285 Impasse Nicolas Apper, 26780 Malataverne, France – sterilisation technology for food, pharmaceuticals and hospitals; part of the group since 1983; https://www.lagarde-autoclaves.com
LUBECASterilisation autoclaves for the pharmaceutical and food industries; part of the group since 1993. Maschinenbau Scholz is the point of contact for maintenance, modernisation and spare parts for existing Lubeca autoclaves and retorts, for example the LW2011 and LW4030 types.

 

Sales network

Worldwide sales are handled through the head office in Coesfeld and more than 30 independent representatives, including in Denmark, the United Kingdom, France, Italy, Spain, Turkey, Russia, China, India, Japan, Korea, Singapore, Taiwan and the USA.

Management

Maschinenbau Scholz GmbH & Co. KG is represented by its managing general partner Scholz GmbH, which is in turn represented by its managing directors.

Managing DirectorMartin Graeber
Managing DirectorMarius Graeber
RepresentationThe KG is represented by its general partner Scholz GmbH, Rottkamp 11, 48653 Coesfeld

Contact

Address

  • Maschinenbau Scholz GmbH & Co. KG, Rottkamp 11, 48653 Coesfeld, Germany

Phone and fax

E-mail

Online

Key services and links

Key services

  • Engineering and manufacture of custom autoclaves
  • Manufacture of patented quick closing doors for pressure vessels
  • Hot air systems for composites and glass
  • Sterilisation autoclaves for food and pharmaceuticals
  • Wood impregnation plants
  • Vulcanisation and tyre recapping systems
  • CV systems for cable insulation
  • Custom vessels to customer specification
  • Modernisation and retrofit of existing units
  • Service and spare parts for Lubeca autoclaves and retorts
  • On-site installation, commissioning and technical support
  • Process control and plant software

Key links

External evidence and verifiable sources

The following external sources document the identity, legal form and data of Maschinenbau Scholz GmbH & Co. KG: