sistag

What sistag does

Sistag AG is a Swiss family-owned industrial manufacturer founded in 1964 — with corporate roots traceable to 1908 — that designs and produces shut-off valves under the Wey brand for critical-infrastructure applications. The company employs roughly 180 people globally, with its main production facility in Eschenbach, Switzerland, a new German operation in Ettlingen, additional U.S. manufacturing, and a regional subsidiary in Singapore. Its product portfolio spans gate valves, butterfly valves, check valves, houseless valves, slide gates, and channel shut-off devices, all engineered for demanding media-handling environments.

The business serves end users across water and wastewater treatment, mining, biogas, industrial manufacturing, and energy/infrastructure — including named reference projects such as Stadtentwässerung Dresden, the Geneva Jet d'Eau, ARA Neugut, Stausee Gigerwald, and industrial customers like Pfeifer & Langen and Munksjö. Manufacturing is anchored in Swiss precision engineering, supported by ISO 9001:2015 quality certification, Module H pressure-equipment compliance, and drinking water approvals, alongside Keyence 3D-scanning-based automated quality control.

Sistag monetizes through direct and partner-channel sales of engineered valve systems, augmented by an express-delivery service (SistagXpress) that targets shorter lead times on stocked configurations. Go-to-market relies on a network of more than 100 distribution partners across 40+ countries, with regional subsidiaries in Germany, the United States, and Singapore providing localized sales, service, and project support to engineering contractors, municipal utilities, and industrial operators.

Name

sistag

Legal name

Sistag AG

Website

https://sistag.ch

Company type

Private

Founded year

1964

Operating status

Operating

Short description

Sistag AG is a Swiss family-owned manufacturer of Wey-brand industrial shut-off valves, serving water/wastewater, mining, biogas, and industrial customers across 40+ countries through 100+ distribution partners and regional subsidiaries.

Ownership category

akta.pro rank

Product category

Industrial Valves and Flow Control Equipment

NAICS

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

SIC

General Industrial Machinery & Equipment (3560)

akta.pro primary industry

Plumbing Valves & Controls (Shutoff, Mixing, Backflow) (IMADALAB)

akta.pro secondary industries

Valves & Cartridge Valves (Directional, Pressure, Flow Control) (IMAHAGAE), Water & Wastewater Pipeline Pumping/Booster Stations & Pressure Management (Conveyance) (TLAGAHAJ), Valves, Regulators & Backflow Prevention (Control Valves, Pressure Regulators, Check/Backflow) (AFABAHAG)

Keywords

• Industrial shut-off valves
• Knife gate valves
• Water and wastewater valves
• Mining slurry valves
• Heavy-duty slide gates

Headquarters

HQ city

Eschenbach

HQ country

Switzerland

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Valve Sales: Sistag generates the majority of revenue through the manufacture and sale of Wey brand industrial valves including gate valves, check valves, and housing-less valves. Products are manufactured in Switzerland (Eschenbach), Germany (Ettlingen), and the USA, with standard models and custom configurations available.
2. Service and Maintenance: The company provides installation, commissioning, service, and maintenance services for Wey valves, particularly within Switzerland where service teams perform on-site work. Replacement parts for individual valve components are also sold.
3. Training and Education: Sistag offers technical training programs for customers and distribution partners on valve installation, AUMA actuator settings, maintenance and repair, conducted at their production facilities.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels8 records

Core offering

Sistag AG manufactures and sells industrial shut-off valves under the Wey brand for flow isolation and control. The product range includes gate valves (Plattenschieber), butterfly valves (Absperrklappen), check valves (Rückschlagklappen), houseless valves, slide gates (Schütze), and channel shut-off devices, complemented by installation, maintenance, training, and 24-hour express delivery (SistagXpress) services. Customers are primarily water/wastewater utilities, mining operators, biogas plants, hydropower stations, and industrial manufacturers in more than 40 countries.

Product overview

Sistag AG is a Swiss family-owned manufacturer of industrial shut-off valves, producing under the Wey brand (a registered international trademark). The product portfolio centers on four main valve types: Plattenschieber (gate valves) as the flagship patented design, Absperrklappen (butterfly valves) and Rückschlagklappen (check valves) for water and industrial applications, and gehäuselose Armaturen (houseless valves) for space-constrained installations. Additional offerings include Schütze (slide gates) for heavy-duty mining and bulk material applications, and Kanalabsperrorgane (channel shut-off devices). The company also provides SistagXpress for rapid delivery and specialized Schmelzeschieber (melt valves) for plastic manufacturing. Valves can be equipped with manual, pneumatic, or AUMA electric actuators. Products are manufactured in Switzerland (Eschenbach), Germany (Ettlingen), and the USA, with distribution through a network of over 100 partners in more than 40 countries.

Differentiator

Problem solved

Functional benefit

Products and services

• Wey Plattenschieber (Gate Valves) Wey gate valves (Plattenschieber) are the company's flagship shut-off product, featuring a patented gate valve design originally developed with Swiss engineer Joseph Wey and sold under the Wey international trademark. Available in multiple series including VN and MF, they are designed for shut-off of media in water treatment, mining, and industrial processes.
• Wey Absperrklappen (Butterfly Valves) Wey butterfly valves (Absperrklappen) are shut-off valves designed for water treatment, drinking water, and industrial process applications. They carry drinking water certification for use in potable water systems and are part of the core Wey product range.
• Wey Rückschlagklappen (Check Valves) Wey check valves (Rückschlagklappen) prevent backflow in piping systems and are designed for water treatment and drinking water applications with appropriate certifications.
• Wey Gehäuselose Armaturen (Houseless Valves) Wey houseless valves (Gehäuselose Armaturen) are designed for applications requiring minimal space, with a construction where the valve body is integrated into the pipeline rather than using a separate housing unit.
• Schütze (Slide Gates) Slide gates (Schütze) are heavy-duty shut-off devices designed for demanding applications including mining, bulk material handling, and industrial processes where robust isolation is required.
• Kanalabsperrorgane (Channel Shut-off Devices) Channel shut-off devices are specialized valves designed for channel and duct applications in water treatment and industrial environments.
• Wey Schmelzeschieber (Melt Slide Gates) Specialized slide gates for plastic granulate manufacturing, featuring heated housings, special materials and coatings, and custom execution options to prevent cooling or damage to hot, viscous plastic melts.
• SistagXpress (24-Hour Express Delivery Service) Express delivery service offering shipment of standard-specification valves within 24 hours across Germany, or same-day pickup at the Ettlingen facility at no extra charge.

Quantifiable outcome

• 24-hour express delivery available for standard valve configurations in Germany
• +2 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature3 records

Partnerships

14 partnerships are on record, tiered core and minor.

• Sycomore (KEON Gruppe)coreChannel Partner/ Reseller/ Distributor · 1 January 2023Sycomore, part of the KEON group, serves as Wey's official distribution partner in France, specializing in biogas applications. With over 100 biogas plants under maintenance in France, Sycomore has extensive expertise with Wey valves and represents them officially in the French market. The partnership was formalized in 2023.
• AquavalveminorChannel Partner/ Reseller/ Distributor · 1 January 2021Distribution partner representing Wey valves in Portugal.
• Vordermaier GmbHminorChannel Partner/ Reseller/ Distributor · 1 January 2021Distribution partner representing Wey valves in Austria.
• Bickel & Wolf GmbHminorChannel Partner/ Reseller/ Distributor · 1 January 2021Distribution partner representing Wey valves in Austria.
• Indutec Soluciones Técnicas S.L.U.coreChannel Partner/ Reseller/ Distributor · 1 January 2018Spanish distribution partner representing Wey valves in Spain, with headquarters in Montmeló. Indutec has successfully completed multiple paper industry projects with Sistag, including installations at the Munksjö paper factory in Tolosa. Indutec serves as main sponsor of the Pumps & Valves Bilbao trade show.
• AFT Sp. z o.o.coreChannel Partner/ Reseller/ Distributor · 1 January 1998Polish distribution partner AFT has represented Wey valves for over 26 years. AFT organizes customer visits to Sistag's Swiss production facility for pressure testing demonstrations and training on large DN 1400+ gate valves for wastewater applications.
• swiss exportcoreGTM or Marketing Partner · 1 January 1977Sistag has been a member of swiss export since 1977, making it the longest-standing member of the association. The partnership provides networking, knowledge sharing, and export support services.
• PT OSA IndustriescoreChannel Partner/ Reseller/ DistributorIndonesian distribution partner representing Wey valves in Indonesia. Sistag exhibited together with PT OSA at the Indonesia Miner 2026 trade show.
• Sunsay Muhendislik End. MalzcoreChannel Partner/ Reseller/ DistributorTurkish distribution partner representing Wey valves for mining applications in Turkey. Partners exhibited together at Mining Türkiye 2024 in Istanbul.
• EuroCons GroupcoreChannel Partner/ Reseller/ DistributorSerbian distribution partner representing Wey valves in Serbia and the Western Balkans region.
• Ageco Italia SrLcoreChannel Partner/ Reseller/ DistributorItalian distribution partner representing Wey valves in Italy, specializing in wastewater treatment and environmental technology applications. Participated in Ecomondo trade show in Rimini.
• AUMAcoreTechnology or IntegrationAUMA is the primary supplier of electric actuators for Wey valves. Sistag offers training programs on AUMA actuator installation, adjustment, and maintenance. German operations now also perform AUMA actuator mounting on gate valves at the Ettlingen facility.
• Switzerland Global Enterprise (S-GE)coreGTM or Marketing PartnerS-GE supports Sistag with export activities and market development. Sistag was named S-GE Member of the Month in October 2021 and has benefited from S-GE's global partner network.
• FastemscoreTechnology or IntegrationFastems provides the flexible manufacturing system (FMS) used in Sistag's Swiss production, enabling automated machine pallet handling for 24-hour production including unmanned night shifts.

Scale indicators8 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Stafsjö Valves: Swedish manufacturer of knife gate valves and related flow control products, closely comparable to Sistag's flagship Wey Plattenschieber (gate valve) line. Both serve water/wastewater, pulp & paper, mining, and process industries with specialized shut-off solutions.
• DeZURIK: US-based manufacturer of knife gate valves, butterfly valves, and check valves for water/wastewater and process industries. Direct competitor to Wey in municipal water and industrial applications, with comparable product breadth and end-market focus.
• Velan Inc. Canadian manufacturer of industrial valves including gate, globe, check, ball, and butterfly valves for power, oil & gas, and water. Comparable in its focus on high-spec industrial shut-off valves, though larger and broader in scope than Sistag.
• Mueller Water Products: US manufacturer of water infrastructure products including gate valves, check valves, and hydrants for municipal water and wastewater. Directly comparable to Sistag's municipal water focus though specializing more in North American markets.

Broad incumbents

• KSB SE & Co. KGaA: German global leader in pumps, valves, and related systems with strong presence in water/wastewater, mining, and process industries. Competes with Sistag across multiple valve product lines but operates at significantly greater scale with a much broader portfolio.
• Flowserve Corporation: US-headquartered global flow control specialist producing industrial valves, pumps, and seals for power, oil & gas, water, and chemical markets. A large incumbent competing with Wey in mining and process applications where Sistag also serves customers.
• Crane Co. US diversified industrial manufacturer with a major Crane Valve Group serving chemical, energy, and water markets. Competes broadly with Wey in industrial shut-off and process valves but as part of a much larger diversified portfolio.
• Pentair plc: Global water solutions company with flow and filtration products including valves for residential, commercial, and industrial water applications. Overlaps with Sistag in water/wastewater valves but operates at much larger scale across broader water treatment.
• Emerson Electric (Valve Automation): US conglomerate with significant industrial valve and automation offerings through brands including Fisher, Bettis, and Keystone. Competes with Sistag in process valve automation while operating a much larger global portfolio across multiple flow control categories.

Others

• AUMA Riester GmbH & Co. KG: German manufacturer of electric actuators used to automate industrial valves. Direct technology partner to Sistag (primary supplier for Wey valves) with deep integration via training programs and actuator assembly at the new Ettlingen facility.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@sistagag
• Facebookfacebook.com/weyvalve
• LinkedInlinkedin.com/company/23307943
• Instagraminstagram.com/sistagag

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Subsidiaries3 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 sistag