Lange

What Lange does

Lange GmbH DIM is a German Mittelstand engineering and manufacturing company specializing in paper stock preparation, headquartered in Nattheim, Baden-Württemberg. Founded in 2009 as a successor to W. Lange GmbH, the company is family-owned and led by managing directors Daniel Lange and Sandra Lange. It designs, manufactures, services, and optimizes pulping and sorting systems that process recycled and virgin fiber for paper, cardboard, and packaging mills across Germany, the Netherlands, Austria, and Switzerland. Its customer base of 100+ includes Kimberly Clark Professional, Smurfit Kappa, DS Smith, LEIPA, Koehler Paper, Feldmühle, Felix Schoeller, and Neenah.

The company's core technology is the patented Triplex pulper container design (offered in TPP primary and TPS secondary variants, the latter launched in 2024), which enables drop-in replacement of existing CMV10 containers while delivering up to 30% energy savings in fiber dissolution and cleaning. Complementing this is the GREENLINE proprietary rotor family — Foil-Rotoren GL (up to 20% energy savings) and Fin-Rotoren GL (up to 35% energy savings on motor current) — developed in-house via CFD analysis and produced with PTA plasma-transferred-arc welding for superior armor quality. The 24,652 repair hours and 632 repairs completed in 2022 demonstrate a high-volume maintenance operation, supported by mobile 3D-scanning measurement (0.05mm accuracy over a ~10x5x5m field) and EN1090-2-certified in-house manufacturing including welding, machining, dynamic balancing, and wear-protection services such as ceramic and basalt linings.

Revenue is generated across four streams: (i) engineered equipment and systems sales (Triplex pulpers, rotor upgrades, new installations), (ii) maintenance, repair, and overhauls, (iii) spare and wear parts (screen baskets, plates, rotors, linings), and (iv) industrial contract manufacturing. Pricing is project-based and quote-driven following a free technical consultation; contract durations can be multi-year. Go-to-market is enterprise field sales with a 4-hour weekday response SLA, direct to paper and cardboard factories without intermediaries. Distribution is regionally focused (DACH-region plus the Netherlands) for current operations, with international on-site assembly available on demand. The company markets primarily through its website, case studies, and broader trade relationships, and has received ZIM federal funding and the BSFZ seal recognizing its R&D as innovative.

Name

Lange

Legal name

Lange GmbH DIM

Website

https://wl-hdh.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Short description

Lange GmbH DIM is a German Mittelstand engineering firm that designs, manufactures, and services patented energy-saving pulper systems, GREENLINE rotors, and maintenance solutions for paper and cardboard factories across Europe, serving 100+ enterprise customers including Kimberly Clark, Smurfit Kappa, and DS Smith.

Ownership category

akta.pro rank

Headquarters

HQ city

Nattheim

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Engineering & Machine Construction: Design and construction of new energy-efficient pulper systems and stock preparation equipment. Includes Triplex Pulper systems, rotor upgrades, and complete machine solutions. Revenue generated through equipment sales and custom engineering projects.
2. Maintenance & Repair Services: Repair, overhaul, and optimization services for existing stock preparation equipment. Includes documented repair processes, 3D scanning, and quality assurance. 24,652 repair hours and 632 repairs completed in 2022 alone.
3. Spare & Wear Parts: Supply and refurbishment of replacement components including screen baskets, screen plates, rotors, and wear protection elements. Also includes ceramic linings and basalt linings for extending component life.
4. Industrial Manufacturing: Contract manufacturing services including welding assemblies, machining, robot welding (PTA/MIG/MAG), slotting, dynamic balancing, and surface technology. EN1090-2 certified manufacturing of steel and stainless steel components.
5. Assembly Services: On-site installation and assembly services for shutdowns, including disassembly and assembly of plant components, machine overhauls, and documentation of maintenance measures.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

Lange GmbH DIM designs, manufactures, and services stock preparation equipment for the paper and cardboard industry, including the patented Triplex Primär and Sekundär Pulper systems, the GREENLINE line of energy-saving rotors, and comprehensive spare/wear parts. The company additionally delivers maintenance, repair, optimization, on-site assembly, and EN1090-2-certified industrial manufacturing services, all procured through consultation-driven project quotes for paper producers.

Product overview

Lange GmbH DIM is a specialized machine and plant engineering company focused on paper stock preparation, offering a unified portfolio centered on pulper systems and components for the pulp and paper industry. The core product line includes the patented Triplex Primär Pulper (TPP) and Triplex Sekundär Pulper (TPS), which deliver up to 30% energy savings through innovative container design. Supporting this core are the GREENLINE rotor product lines (Foil-Rotoren and Fin-Rotoren) that provide additional energy efficiency gains of up to 20-35%. The company provides comprehensive services including pulper optimization, maintenance, assembly services, and industrial manufacturing (EN 1090-2 certified), along with specialized wear protection solutions using PTA welding, basalt linings, and ceramic linings. A notable technology capability is the use of 3D-scan technology for precision documentation and measurement, and the proprietary PTA-Schweißverfahren for high-quality armor layer welding.

Differentiator

Problem solved

Functional benefit

Brands

• GREENLINE: Proprietary line of energy-efficient rotors for paper stock preparation machines, including Foil-Rotoren GL and Fin-Rotoren GL product lines.
• Triplex Pulper

Products and services

• Triplex Primär Pulper (TPP) Patented primary pulper with the innovative Triplex container design for energy-efficient fiber dissolution in paper stock preparation, capable of up to 30% energy savings; intended for paper and cardboard factories.
• Triplex Sekundär Pulper (TPS) Secondary pulper using the patented Triplex design for efficient and economical pulper cleaning, allowing simple exchange of existing CMV10 containers while retaining existing screen boxes, bearings, and seal groups; designed for paper and cardboard factories.
• GREENLINE Rotors (Foil and Fin rotor product line) Proprietary GREENLINE line of energy-efficient rotors for paper sorting machines, including Foil-Rotoren GL (up to 20% energy savings via optimized flow engineering) and Fin-Rotoren GL (up to 35% energy savings on motor current), with improved quality, stability, and service life.
• Pulper Optimization Service Consultative optimization service for existing pulper installations to identify and realize energy savings and process improvements; delivered to paper and cardboard factories.
• Paper Stock Preparation Maintenance (Instandhaltung) Repair, overhaul, and documentation services for paper stock preparation equipment, supported by mobile 3D-scan measurement, documented quality reports, and PTA welding procedures; performed for paper and cardboard factories.
• Assembly Service (Montageservice) On-site installation and assembly services for short and major plant shutdowns, including disassembly and reassembly of plant components, machine overhauls, and documentation of maintenance measures.
• Industrial Manufacturing (Industrielle Fertigung) Contract manufacturing services including welding assemblies, machining, robot welding (PTA/MIG/MAG), slotting, nutting, dynamic balancing, and EN1090-2-certified steel and stainless steel component manufacturing for industrial customers.
• Wear Protection Service (Verschleißschutz) Wear protection services including armoring, basalt linings, ceramic linings (aluminum oxide, silicon carbide), and hard chrome plating to extend the service life of rotors, containers, and other stock preparation components.

Quantifiable outcome

• Up to 30% energy savings in pulper operations
• +5 more outcomes

Named customers19 records

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Kadant: US-based supplier of engineered components and equipment, with a Paper segment focused on stock preparation, fluid handling, and recycling equipment for paper and packaging producers. Directly comparable to Lange as a niche specialist in pulping and stock prep subsystems, with a similar model of equipment plus high-margin aftermarket parts and services.
• Toscotec: Italian designer and manufacturer of paper machines, tissue lines, and stock preparation equipment, with a strong aftermarket service business. Comparable to Lange in delivering capital equipment plus service and upgrades to paper mills, though with a heavier emphasis on complete tissue and paper machine rebuilds.
• A.Celli Group: Italian producer of machines and equipment for tissue, paper, and nonwovens, including stock preparation, rewinding, and converting technologies. Directly comparable to Lange as a European-based specialty OEM serving paper producers with both new equipment and service offerings.
• Cellwood Machinery: Swedish manufacturer specializing in pulping, deflaking, screening, cleaning, and dispersing equipment for recycled fiber-based paper and board production. Directly comparable to Lange as a focused stock-preparation equipment OEM serving paper and cardboard mills, particularly in European markets.

Broad incumbents

• Voith: German-headquartered global industrial technology group whose Paper & Tissue division designs, builds, and services stock preparation, pulping, and paper-making machinery. Comparable to Lange as a machinery and service provider to the paper industry, but at vastly larger scale and with a broader product portfolio beyond pulpers and rotors.
• Andritz: Austrian global supplier of plants, equipment, and services for pulp and paper, hydropower, metalworking, and other industries. Highly comparable to Lange as a provider of pulping and stock preparation equipment and aftermarket services to paper mills, but with much broader product scope, global footprint, and deeper R&D resources.
• Valmet: Finnish-leading global developer and supplier of process technologies, automation, and services for the pulp, paper, and energy industries. Comparable to Lange in serving paper mills with capital equipment and lifecycle services, but operates at significantly larger scale across full machine lines and process areas.

Regional players

• BHS Corrugated Maschinen- und Anlagenbau: German-headquartered global supplier of corrugating machinery and complete corrugator lines, with deep penetration into European paper and packaging producers. Comparable to Lange as a German industrial machinery specialist serving paper and packaging customers, though focused on the converting end of the value chain rather than stock preparation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/w-lange-gmbh

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Lange