Manufacture of valves for stock preparation as well as machinery, apparatus, pressure vessels and contract manufacturing in steel and stainless steel
K industries – ALTHAMMER GmbH (MARTIN LOHSE GmbH)
89522 Heidenheim (Oggenhausen), DeutschlandNew on Amplifa
Valve engineering and mechanical engineering since 1908
The long-established company from Heidenheim-Oggenhausen, formerly MARTIN LOHSE GmbH, was founded in 1908 as a structural and artistic metalworking shop and has belonged to K industries – ALTHAMMER GmbH since 01.08.2026. On more than 10,000 m² of production space, over 110 employees manufacture high-quality products in steel and stainless steel – from simple steel cutting to complete machines and apparatus. The portfolio includes valves such as gate, control and reject valves for stock preparation, paper technology (pulper, sorters, reject drums, fans), waste technology (waste disintegrators, dewatering presses, bio-mechanical wet processing plants) as well as industry-independent contract manufacturing with sheet metal cutting, bending, welding, CNC turning and milling and surface treatment. Custom-made pressure vessels up to PN 60, category III and IV, with up to 3000 mm diameter, 12 m length and 12 t unit weight are also manufactured as one-offs. Production follows certified quality management standards such as DIN EN ISO 9001, HP-0 with DIN EN ISO 3834 and DIN EN 1090-2 EXC 3. Customers include the paper, waste management, chemical, mining, pharmaceutical, water treatment, food, construction and biogas industries in Germany, Europe and overseas.
- Site
- Heidenheim
- Processes
- Sheet metal cutting (plasma cutting), Sheet metal cutting (waterjet cutting), Sheet metal cutting (guillotine shear), Press brake bending, Plate rolling, Ring rolling, Welding / welded assemblies (HP-0, DIN EN ISO 3834, DIN EN 1090-2 EXC 3), CNC turning
- Materials
- S235, S275, S355, P235, P275, P355, 1.4301, 1.4571
- Certificates
- DIN EN ISO 9001:2015, DIN EN ISO 9001:2015 (Maschinenbau Lohse GmbH), DGRL 2014/68/EU Module A2 (Q-Modules A2 D1 E1 H H1), AD 2000 Merkblatt HP-0 / DIN EN ISO 3834, Certified operation under WHG (§19 I), DIN EN 1090-2 EXC 3 (WPK), ATEX manufacturer's declaration, DIN EN ISO 9001:2015 (MARTIN LOHSE GmbH), DGRL 2014/68/EU Module A2
- Founded
- 1908
- Employees
- 110+
- Industries
- Paper industry, Chemical industry, Waste management and biowaste processing, Environmental technology, Mining, Pharmaceutical industry
- 01
Engineering (design, construction, production drawings, material selection)
- 02
Sheet metal cutting (plasma, waterjet, guillotine shear)
- 03
Bending (press brake, plate rolling, ring rolling)
- 04
Welding and welded assemblies
- 05
CNC turning, CNC milling, 5-axis machining, balancing
- 06
Surface treatment (sandblasting, pickling, vibratory grinding, painting)
- 07
Assembly into functional units
- 08
Testing (spectral analysis, acceptance inspection certificates per DIN EN 10204)
- 09
Service: spare parts, repairs, factory overhauls, mobile test rigs
Locations
Heidenheim (Oggenhausen)
DEHeadquarters with valve engineering and mechanical engineering production, contract manufacturing
- Part weight / size
- Component weights up to 15 t (welding turning tables),
- Lot size
- Single item to series
- Materials
- Steel S235–S355, pressure vessel steel P235–P355, stainless steel 1.4301–1.4539, duplex 1.4462, aluminium, non-ferrous
- Plasma cutting system up to 13000 x 3050 x 150 mm
- Waterjet cutting system up to 6050 x 3050 x 150 mm
- Guillotine shear up to 3000 mm length, 4 mm thickness
- Press brake up to 6000 mm, 320 t press force
- Plate rolling machine up to 3000 mm length, 16 mm thickness
- Ring rolling machine up to 120 x 40 mm on edge
- CNC lathes up to Ø 1625 mm and 3500 mm length
- CNC milling machines up to 6000 mm length
- 5-axis CNC machining up to Ø 60 mm
- Balancing machine up to 300 kg
- Welding turning tables up to 15 t
- Sandblasting system 8 x 5 x 4 m, up to 12 t
- Stainless steel pickling system 15 x 6 x 4.5 m, up to 10 t
- Vibratory grinding system up to 1800 x 600 x 600 mm
- 4 overhead crane tracks (2 x 16 t, 2 x 10 t)
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Sheet metal cutting (plasma cutting)Machining | – | 13000 mm × 3050 mm | – | – | Steel S235, Steel S355, Stainless steel 1.4307, Stainless steel 1.4571, Stainless steel 1.4539, Stainless steel 1.4462 |
| Sheet metal cutting (waterjet cutting)Machining | – | 6050 mm × 3050 mm | – | – | Steel S235, Steel S355, Stainless steel 1.4307, Stainless steel 1.4571, Stainless steel 1.4539, Stainless steel 1.4462 |
| Sheet metal cutting (guillotine shear)Machining | – | 3000 mm | – | – | – |
| Press brake bendingForming | – | 6000 mm | – | – | Sheet metal, Bar stock |
| Plate rollingForming | – | 3000 mm | – | – | Sheet metal |
| Ring rollingForming | – | 120 mm × 40 mm (on edge) | – | – | – |
| Welding / welded assemblies (HP-0, DIN EN ISO 3834, DIN EN 1090-2 EXC 3)Joining | – | – | 15 t (welding turning tables) | Single item – Series | Steel S235, Steel S275, Steel S355, Pressure vessel steel P235, Pressure vessel steel P275, Pressure vessel steel P355, Stainless steel 1.4301, Stainless steel 1.4571, Stainless steel 1.4404, Stainless steel 1.4462, Stainless steel 1.4539, Non-ferrous metals/aluminium |
| CNC turningMachining | – | 3500 mm × Ø 1625 mm | – | – | – |
| CNC millingMachining | – | 6000 mm | – | – | – |
| 5-axis CNC machiningMachining | – | Ø 60 mm | – | – | – |
| Grooves / thread cuttingMachining | – | – | – | M10 – Tr 36x6 | – |
| BalancingTesting | – | – | 300 kg | – | – |
| SandblastingSurface | – | 8 m × 5 m × 4 m | 12 t | – | – |
| Stainless steel picklingSurface | – | 15 m × 6 m × 4.5 m | 10 t | – | Stainless steel |
| Vibratory grindingSurface | – | 1800 mm × 600 mm × 600 mm | – | – | – |
| PaintingSurface | – | – | – | – | – |
| ElectropolishingSurface | – | – | – | – | Stainless steel, Aluminium |
| Pressure vessel manufacturing (air, nitrogen, water, argon up to PN 60 / 50°C, cat. III and IV)Joining | – | 12 m × Ø 3000 mm × 12 m | 12 t (wall thickness 3–25 mm) | – | Steel sheet, Stainless steel, Pressure vessel steel P235, Pressure vessel steel P275, Pressure vessel steel P355 |
| Engineering: development, construction, production drawings, material selectionEngineering | – | – | – | Single item – Series | – |
| Assembly (precision mechanics: assembly into functional units)Assembly | – | – | – | – | Metal |
| Repairs and factory overhauls of valves and plantsAssembly | – | – | – | – | – |
| Mobile spectral analysis of ferrous materialsTesting | – | – | – | – | Ferrous materials |
16 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Plasma cutting system | – | – | 13000 x 3050 x 150 mm thickness | – | Heidenheim |
| Waterjet cutting system | – | – | 6050 x 3050 x 150 mm thickness | – | Heidenheim |
| Guillotine shear | – | – | up to 3000 mm length, 4 mm thickness | – | Heidenheim |
| Press brake | – | – | up to 6000 mm length, 320 t press force | – | Heidenheim |
| Plate rolling machine | – | – | up to 3000 mm length, 16 mm thickness | – | Heidenheim |
| Plate rolling machine | – | – | up to 2000 mm length, 4 mm thickness | – | Heidenheim |
| Ring rolling machine | – | – | up to 120 x 40 mm on edge | – | Heidenheim |
| CNC lathe | – | – | up to Ø 1625 mm and 3500 mm length | – | Heidenheim |
| CNC milling machine | – | – | up to 6000 mm length | – | Heidenheim |
| 5-axis CNC machining center | – | – | up to Ø 60 mm | – | Heidenheim |
| Balancing machine | – | – | up to 300 kg | – | Heidenheim |
| Welding turning table | – | – | up to 15 t | – | Heidenheim |
| Sandblasting system (cabin) | – | – | 8 x 5 x 4 m, component weight up to 12 t | – | Heidenheim |
| Stainless steel pickling system | – | – | 15 x 6 x 4.5 m, component weight up to 10 t | – | Heidenheim |
| Vibratory grinding system | – | – | up to 1800 x 600 x 600 mm | – | Heidenheim |
| Overhead crane | – | 4 | Production hall 1 (80 x 20 m): 2 pcs. 16-t cranes; production hall 2 (60 x 15 m): 2 pcs. 10-t cranes | – | Heidenheim |
Additional services
Reference customers
Quality and certification
Production is certified according to DIN EN ISO 9001:2015 (valve engineering and mechanical engineering), with in-house production control (WPK) according to DIN EN 1090-2 EXC 3, HP-0 approval in conjunction with DIN EN ISO 3834 as well as DGRL 2014/68/EU Module A2. Acceptance inspection certificates per DIN EN 10204 and mobile spectral analysis of ferrous materials complete the quality assurance.
| Evidence | Heidenheim (Oggenhausen) |
|---|---|
| DIN EN ISO 9001:2015 (MARTIN LOHSE GmbH) | |
| DIN EN ISO 9001:2015 (Maschinenbau Lohse GmbH) | |
| DGRL 2014/68/EU Module A2 | |
| AD 2000 Merkblatt HP-0 / DIN EN ISO 3834 | |
| DIN EN 1090-2 EXC 3 (WPK) | |
| Certified operation under WHG (§19 I) | |
| ATEX manufacturer's declaration |
Company history
- 1908
Founded as a structural and artistic metalworking shop in Heidenheim an der Brenz
- 1946
First orders from the paper industry, e.g. log transport drums
- 1949
Manufacture of the first pulper and the first pulp chests
- 1959
Start of valve engineering: first valves for stock preparation with control technology
- 1962
Groundbreaking for the new plant in Oggenhausen; first series production of LOHSE valves
- 1966
First large valve package delivered to Gernsbach
- 1974
Development of the LW500 strand shear
- 1975
First representation abroad
- 1984
First rakes for coarse removal from pulpers
- 1985
Development of pulpers for biowaste
- 1991
Development of the dewatering press
- 1996
First reject drums; delivery of five complete plants for biowaste processing
- 2001
World's largest board machine equipped with LOHSE valves; development of the bulk material valve
- 2002
Construction of a fan with 8.3 m diameter, 125 t weight and 3800 kW power
- 2004
Gate valve DN 1000 delivered to China
- 2005
Development of valves for the high-pressure range
- 2006
Development of the metal-sealed RQS valve
- 2014
References in the paper, waste management, chemical, mining, pharmaceutical, water treatment, food, construction and biogas industries
- 2020
Largest order in the company's history: complete valve package for one of the most modern paper mills in the world (Progroup AG, Sandersdorf-Brehna); two gate valves DN 1800 for a pulp mill in South America
- 2026
Acquisition of MARTIN LOHSE GmbH by K industries – ALTHAMMER GmbH on 01.08.2026 following insolvency