Klaus Union

What Klaus Union does

Klaus Union GmbH & Co. KG is a privately held, owner-managed German industrial-equipment manufacturer founded in 1946 and headquartered in Bochum, Germany. The company designs and builds pumps and valves for the chemical, petrochemical, oil and gas, renewable energy, life sciences, and heavy-industrial end-markets, with a global operating footprint across more than 70 countries via subsidiaries and direct field sales.

The company's product platform centers on sealless magnetic-drive pump technology — the use of permanent-magnet couplings and static containment shells to hermetically isolate pumped liquids from the atmosphere, eliminating dynamic seals and preventing leakage of aggressive, toxic, or explosive media. The portfolio spans single-stage and multi-stage centrifugal pumps (SLM NV, AP, AV, GV/HV, SV, NVT, NHO, NK, TK variants), PTFE/PFA-lined variants for highly corrosive service, side channel pumps, twin screw pumps (SLM DSP-2C and DSP-4C variants), propeller pumps, and complementary metal-seated gate, globe, control, check, and butterfly valves. Differentiated proprietary features include the hybrid double containment shell combining metallic and ceramic non-metallic barriers, non-metallic containment shells with energy-efficiency benefits (no eddy-current losses), and temperature-monitoring and secondary mechanical seal safety systems. Products are engineered to international codes including DIN EN ISO 2858/15783, API 610, API 676, API 685, and ASME B73.3, with certifications including ISO 9001, ISO 50001, ISO 3834-2, CE0045 Modul H, and PED compliance.

Klaus Union operates a custom-engineered, quote-based enterprise sales model: customers submit detailed application specifications through a website quote form or direct contact, and pricing varies by material, pressure rating, temperature, and configuration. Revenue is generated through two main streams: (1) OEM hardware sales of pumps and valves into new plant builds and retrofits, and (2) after-sales service and spare parts delivered through wholly-owned subsidiary Klaus Union Service GmbH (founded 2006), which also runs customer training seminars. The go-to-market relies on direct enterprise field sales supported by major industry trade shows (ONS, ADIPEC, Hydrogen & Carbon Capture Technology, PUMPS & VALVES Dortmund), an extensive downloadable technical-content library, and global service coverage. Recent strategic emphasis has shifted toward hydrogen, carbon capture, and other energy-transition applications alongside the company's traditional chemical and oil & gas customer base.

Name

Klaus Union

Legal name

Klaus Union GmbH & Co. KG

Website

https://klaus-union.com

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Klaus Union is a privately held German industrial OEM that designs and manufactures sealless magnetic-drive pumps, mechanical-seal centrifugal and twin screw pumps, and metal-seated valves for the chemical, petrochemical, oil and gas, renewable energy, and life-sciences sectors, with global direct field sales and dedicated after-sales service.

Ownership category

akta.pro rank

Product category

Industrial Pumps and Valves

NAICS

Pump and Compressor Manufacturing (33391), Industrial Valve Manufacturing (332911)

SIC

Pumps & Pumping Equipment (3561)

akta.pro primary industry

Centrifugal Pumps (IMAHANAA)

akta.pro secondary industries

Seals, Valves & Auxiliary Components (for Pumps/Compressors) (IMAHANAH), Positive Displacement Pumps (IMAHANAB), Pump & Compressor Packages (Skids, Booster Sets) (IMAHANAG)

Keywords

• Industrial pump manufacturing
• Magnetic drive pumps
• Centrifugal pumps
• Industrial valves
• Process equipment services

Headquarters

HQ city

Bochum

HQ country

Germany

HQ region

Europe

Offices2 records

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 Pump Sales: Manufacture and sale of centrifugal pumps, side channel pumps, and twin screw pumps. Pumps are available in various designs including sealless with magnet drive or mechanically sealed configurations. Revenue generated from original equipment sales to industrial customers.
2. Industrial Valve Sales: Manufacture and sale of metal-seated gate valves, shut-off and control valves, check valves, butterfly valves and control butterfly valves. Revenue generated from valve product sales.
3. After-Sales Service: Klaus Union Service GmbH provides comprehensive service including consulting, planning, documentation, and spare parts supply. Service draws on 75 years of process engineering experience with pumps, valves and agitator drives.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Klaus Union manufactures and supplies industrial pumps and valves — including centrifugal pumps, side channel pumps, and twin screw pumps with magnetic drive (sealless) or mechanical seal configurations, plus metal-seated gate, globe, control, check, and butterfly valves. The company specializes in magnetically coupled, hermetically sealed pumps that eliminate shaft seals to prevent leakage of aggressive, toxic, and explosive media. It also provides after-sales service, maintenance, repair, spare parts, and training seminars through its subsidiary Klaus Union Service GmbH.

Product overview

Klaus Union is a world-leading supplier of industrial pumps and valves for the chemical, petrochemical, oil and gas, and renewable energy sectors. The product portfolio comprises centrifugal pumps (with magnetic drive or mechanical seal), side channel pumps, twin screw pumps, and valves (gate, globe, control, check, and butterfly valves). The company specializes in sealless magnetic drive technology that hermetically seals liquids, eliminating shaft seals and preventing leakage of aggressive, toxic, or explosive substances. Key product lines include the SLM series centrifugal pumps with magnet drive (SLM NV, SLM AP, SLM AV, SLM GV/HV, SLM SV, SLM NVT, SLM NHO, SLM NK, SLM TK), the mechanically sealed centrifugal pump series (NOV, APL, GOV/H, TP NO, P, UP), twin screw pumps with and without magnetic drive (SLM DSP-2C, DSP-2C, DSP-4C), and comprehensive valve solutions. Klaus Union also provides service support including maintenance, repair, and training seminars.

Differentiator

Problem solved

Functional benefit

Products and services

• SLM NV Single-Stage Centrifugal Pump with Magnet Drive (DIN EN ISO) Single-stage centrifugal pump with synchronous permanent magnet drive per DIN EN ISO 2858/15783. Hermetically sealed via containment shell; max flow 3,500 m³/h, delivery head up to 220 m, temperature -200°C to +550°C, pressure up to PN 400. For chemical, petrochemical, oil and gas, and other industrial process plants handling aggressive, toxic, or explosive media.
• SLM AP Single-Stage Centrifugal Pump with Magnet Drive (API 685) API 685-compliant single-stage centrifugal pump with magnetic drive, process-oriented design with separation of liquid chamber and atmosphere via isolation shell. Max flow 3,500 m³/h, max delivery head 220 m, pressure up to PN 400. For refinery and petrochemical applications requiring API 685 compliance.
• SLM AV Single-Stage Centrifugal Pump with Magnet Drive (ASME B73.3)
• SLM GV/HV Multi-Stage Centrifugal Pump with Magnet Drive Multi-stage centrifugal pump with magnetic drive per DIN EN ISO 15783/API 685. Barrel design with only two static seals, up to 15 stages. Max flow 300 m³/h, max delivery head 2,200 m, pressure up to PN 250. For high-head applications in chemical, petrochemical, and oil and gas service.
• SLM SV Side Channel Pump with Magnet Drive Self-priming side channel pump with magnetic drive per DIN EN ISO 15783. Barrel design housing with only two static seals, up to 8 stages. Max flow 42 m³/h, delivery head up to 470 m. For low-flow, high-head service in industrial process plants.
• SLM NVT Vertically Suspended Sump Pump with Magnetic Drive Single/multi-stage vertically suspended sump pump with magnetic drive in VS4/VS6 design. Submerging depth up to 6,000 mm. Temperature -40°C to +200°C, pressure up to PN 63. For tank, pit, and sump applications in industrial process plants.
• Vertical Inline Pump with Magnetic Drive Vertical inline centrifugal pump in close-coupled design per DIN EN ISO 15783, ASME B73.3M, or API 685. Synchronous permanent magnet drive with no dynamic seals. Temperature -120°C to +350°C, pressure PN 40 at 120°C. For space-constrained inline process installations.
• SLM NHO High Temperature Centrifugal Pump with Magnet Drive Single-stage centrifugal pump with magnetic drive for high-temperature service per DIN EN ISO 2858 & 15783. Max flow 1,200 m³/h, delivery head up to 215 m, temperature up to +550°C, pressure up to PN 40. For power plant, refinery, and chemical high-temperature applications.
• Pressure Seal Type Valves Metal-seated valves in pressure seal type design, including gate valves, globe valves (slanted seat), control valves, and swing check valves. For high-pressure service in power, refinery, and chemical plants.
• Bolted Bonnet Valves Valves with bolted bonnet design, including gate valves (wedge or double disc), globe valves (straight seat), piston check valves, and swing check valves. For general industrial process service.
• V-AXX Butterfly Valves and V-AXX ORCA Control Butterfly Valves Five-offset butterfly valve design for industrial applications, plus the V-AXX ORCA control butterfly valve variant for modulating control. For on/off and control service in process plants.
• Klaus Union Service Independent service company (Klaus Union Service GmbH) providing consulting, planning, documentation, maintenance, repair, and spare parts for pumps, valves, and agitator drives, drawing on 75+ years of process engineering experience. For owners and operators of Klaus Union and third-party rotating equipment.
• Service Seminars and Training Training seminars on the use, maintenance, and repair of Klaus Union's magnet drive pumps. For plant maintenance and reliability engineers at customer sites.

Quantifiable outcome

• Maximum flow rate up to 3,500 m³/h
• +4 more outcomes

Named customers3 records

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Iwaki: Japanese manufacturer of magnetic drive pumps and chemical process pumps serving the chemical and semiconductor industries. Directly comparable in sealless pump technology and a fellow identified market specialist.
• Sundyne: Manufacturer of API-compliant centrifugal pumps including sealless magnetic drive units for chemical, petrochemical, and oil & gas applications. Direct competitor in API 685 magnet drive centrifugal pumps, similar to Klaus Union's SLM AP family.
• Richter Chemie-Technik: Specializes in PTFE-lined pumps and valves for corrosive media in the chemical industry, directly overlapping with Klaus Union's PTFE/PFA-lined centrifugal pump (SLM NK) and valve portfolio. Listed as a fellow magnetic drive pump specialist.
• HERMETIC-Pumpen: German manufacturer of hermetically sealed centrifugal pumps using magnetic drive technology, directly competing with Klaus Union in sealless pumps for chemical and petrochemical applications. Explicitly identified as a fellow specialized magnetic drive specialist.
• Magnatex Pumps: US-based manufacturer specializing in magnetic drive and ANSI process pumps for chemical, petrochemical, and industrial applications. Direct peer in the niche of magnetically coupled sealless pumps.

Broad incumbents

• Celeros Flow Technology (Clyde Union): Includes the Clyde Union pump brand, a historical direct competitor in heavy-duty process pumps for power generation, oil & gas, and chemical applications. Overlaps with Klaus Union's high-temperature and API-compliant centrifugal pump lines.
• Sulzer: Swiss global industrial pump and rotating equipment manufacturer with a broad process pump portfolio including magnetic drive and API 610/685 pumps. Competes with Klaus Union in chemical and oil & gas with greater scale and broader geographic reach.
• Ebara Corporation: Japanese global pump manufacturer with chemical process, sealless magnetic drive, and API pump offerings. Competes with Klaus Union in international chemical and petrochemical tenders with broader product breadth.
• KSB: German-headquartered global manufacturer of pumps, valves, and related service. Competes across Klaus Union's product portfolio including process, chemical, and sealless pumps, and represents the largest domestic competitor based in Germany.
• Flowserve: US-listed global manufacturer of pumps, valves, seals, and automation for power, oil & gas, chemical, and water industries. Overlaps with Klaus Union's process pump and valve portfolio across the same end markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

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 Klaus Union