Company Profile

Since 1952 Teesing is an international supplier of fittings, valves, tubing, systems and assemblies for Industrial applications, Submicron Technology and Alternative Energy in Pneumatic, hydraulics, instrumentation and transport of media. With offices in the Netherlands (ISO certified Headquarter in Rijswijk), USA (New Jersey) China (Beijing), and Taiwan, we are globally active in several high niche markets, such as medical/farmaceutical, water treatment, automotive, railway, alternative fuels, and the semiconductor.

Our mission is to offer high quality connectivity solutions for all industries, by providing added-value services as flexibility, engineering field support and the emphasis on technical advice.


In close co-operation with the customer and supported by the latest technology, our Teesing engineering team can develop the right products and client specific requirements. Also provide additional engineering services like supplying CAD-files of most of the products.

Extensive product range

We supply a complete package of products and services you require for your connection applications. Through our specialised knowledge of our products and markets we are capable of responding quickly to all your questions regarding the transport of gases and liquids to your point of use. Thanks to our engineering department we are also capable of delivering customised products and assemblies that are developed to meet the specifications of your critical process demands.

The Semiconductor market

The Teesing submicron technology product range consists of various high quality components ranging from cooling systems, bulk storage gas cabinets, gas monitoring applications, bulk filtration and purification tot point of use gas supply. These products are supplied to semicnoductor toolmakers and meet the stringent demands of the semiconductor industry.

Cleanroom services

Teesing has an in-house cleanroom at the headquarters in Rijswijk, The Netherlands. This gives Teesing the ability to clean, assemble, test and pack all products under cleanroom conditions. The pressurised lean-lifts ensure minimum movement of particles while products are stored before being shipped to the customer.


Using coriolis flowmeters at 1050 bar design pressure for hydrogen refueling

May 11, 2024

Obviously, when vehicles fill up with hydrogen, they must be charged according to the rules. Hydrogen flow measurement is just a lot more complicated than measuring conventional fuels because the hydrogen being refueled is a gas. While temperature and pressure can vary, you still want to settle per kilogram of hydrogen molecules. That can only be done with a mass flow meter. But getting it really right isn’t that easy. Read more

On-tank valve for 700 bar hydrogen tanks

May 4, 2024

For hydrogen to really break through as an energy carrier for vehicles, a number of measures are needed. In addition to available refueling stations, it is especially necessary to improve the range. Currently, hydrogen tanks and systems in vehicles are 350 bar. If that pressure can be raised to 700 bar, that would be a huge step in the amount of H2 that can be carried. Besides the contruction of the tank itself, the on-tank valve is the most challenging component. In collaboration with Germany’s Poppe + Potthoff and China’s Tongji University, we developed a 700 bar on-tank valve. Read more

Teesing – Hydrogen refueling in a meadow

April 20, 2024

Do you want to correct a mismatch between supply and demand of energy? Local storage of energy in hydrogen might be an interesting solution. Our customer HyMatters developed a mobile hydrogen generator, powered by your local solarpanels or windturbine. Read more [Picture source: Teesing BV on linkedin.com]

Liquid hydrogen for aviation

April 13, 2024

AeroDelft has one mission: to prove that emission-free aviation is possible by pioneering electric aircraft powered by liquid hydrogen. Dreaming of a future where emission-free flying is possible: that was the dream AeroDelft started with in 2017. They formulated a very concrete goal: to fly from Amsterdam to London with zero emissions. The energy carrier in that case could be hydrogen. But to have sufficient energy density, the hydrogen will have to be massively compressed as a liquid on board. And that presents quite a few challenges. Challenges that AeroDelft is addressing and Teesing is helping with ultra light assemblies in aluminum. Read more

Understanding leakage, leak testing and solutions

April 6, 2024

There is no such thing as leakage-free, but understanding the different materials and types of leakage can greatly benefit you. We have created a comprehensive white paper on leakage to help you understand, find and prevent leakage in your application. Before you can test for leakage, you need to understand what a leak is. Read more

Volgende fase van een transitie

February 17, 2024

Teesing wijzigt bestuursstructuur met de introductie van een Executive Board. Het is de volgende fase in de transitie van Teesing naar een full service leverancier van systemen voor gassen en vloeistoffen in de hightech sector. De focus is sinds 2010 al verlegd van het leveren van componenten naar het ontwerpen en produceren van assemblages en subsystemen. Daardoor worden er heel andere eisen gesteld aan Teesing die meer in lijn liggen met de rol van subcontractor. Teesing schuift op in de supply chain en levert behalve componenten ook assemblages waarin deze componenten worden verwerkt. Lees verder

Teesing Assembly & Testing Service

February 10, 2024

Teesing Systems & Engineering service

January 13, 2024

Teesing Cleanroom Solutions Service

December 9, 2023

Teesing Introduction

October 21, 2023

We make your technology work

September 23, 2023

2488,4 km on only 950 grams of hydrogen

June 30, 2023

The Ecorunner team of the Technical Universy Delft set the world record of the greatest distance driven by a car on full tanks of hydrogen fuel! Contratulations on this extroadinary feat! The team, for many years sponsored by Teesing, managed to drive 2488,4 km on only 950 grams of hydrogen (in the prototype class).

Which purifier medium in which situation?

April 1, 2023

From semiconductors and electronics to clean energy and solar power, universities and industrial manufacturing, countless industries rely on high or ultra-high purity process gases to support their mission-critical work. In this second part of our e-learning, we take a closer look at gas purification media, chosen specifically for the impurities to be removed. Read more

Tips for proper purification of gases, feeding tools in semicon fabs

March 4, 2023

Accurate and reliable gas supply is a critical part of semiconductor manufacturing. Semiconductor manufacturing is a complex process in which multiple gases at different flow rates are carefully delivered to process chambers to produce critical elements on silicon wafers. To support today’s extensive and varied applications, these gases must not only be delivered in precise quantities, but must also maintain strict purity levels. Read more

Have a look at just how easy it is to fill up a hydrogen car!

February 3, 2023

The WEH TK17 tank nozzles are the standard in the BeNeLux and Teesing is proud to contribute to the energy transition with these products. Watch the video [Source: WEH Refueling Components (H2 & CNG) on YouTube.com]

Precision work for specials Of the 36.000 products

December 2, 2022

Teesing supplies, most come from regular suppliers. But already since our inception we produce specials when the market can’t deliver what our customer needs. To keep price, delivery time and quality under control Teesing critically assesses its partners. Yet we enter into long-term relationships with our suppliers. A good example is the machining company Centri, with whom we have been working for about 30 years. Read more

Technology of Purifiers

October 21, 2022

In this article, we try to help engineers make design choices by explaining the 4 different purifier methods. Read more

All about fluoropolymers

September 24, 2022

When the highest level of chemical resistance is required in gas and liquid systems, plastics immediately come to mind. Teesing sells many types of plastic system components, but this article is specifically about fluoropolymers. The different types sometimes have similar resistance properties, but are still not suitable for every application. The purpose of this article is to explain the differences, in order to contribute to making the right choices in engineering. Read more

High purity filtering in ALD and CVD processes

September 10, 2022

As the semiconductor industry moves to the sub-10 nm line nodes (such as 7nm, 5nm and smaller), nano-sized particles, once considered nuisance particles will be classified as killer defect particles. Particularly in ALD and CVD processes, the need to drive for new ultra-high purity gas filtration technology has become critical. On this scale filtration capabilities should be verified. We would like to share some specific information with you on the various semiconductor manufacturing environments in which these MOTT filters have proven themselves, resulting in less errors and less downtime. Read more

PVDF and stainless steel couplings compared

September 6, 2022

Stainless steel is often the automatic choice in industries where chemical resistance and reliability are critical. But for a large number of stainless steel applications, PVDF is also an option worth considering. For example, in the food industry, chemical industry, semiconductor industry and medical industry. PVDF often offers the same or better performance – at lower costs (up to about ¼ of the stainless steel price). Delivery times are often slightly better and it has a favourable assembly time. Read more

Influence of flow controllers on ultrasonic flowmetersInfluence of flow controllers on ultrasonic flowmeters

September 1, 2022

The operating principle of an ultrasonic flowmeter is based on the use of sound waves. This means that this type of flow meter is sensitive to sonic disturbances. In any measurement environment there will always be some form of sonic noise. Up to a certain point this is not a problem. When does it become a problem? Read more

Tailor-made distribution block for clean room application

August 19, 2022

VDL Klima and Teesing have worked together for many years, including on components for liquid based temperature controlling systems. This involved design, assembly and delivery. This story is about how in that collaboration you sometimes take a trip: the starting point is the first idea and together you eventually arrive at a modified design. Lees verder

Measuring natural gas at 67 bar and with 1m diameter

August 6, 2022

Gasunie is responsible for the natural gas distribution network in the Netherlands. The main transport pipeline, which runs roughly around the IJsselmeer, is 1.06 m in diameter (42″) and has a nominal pressure of 67 bar. Gasunie uses ultrasonic flow meters for flow measurement. What are the considerations for choosing an ultrasonic flow meter in this type of situation?

A nice example of co-engineering and cleanroom assembly

July 30, 2022

Testing electronics under cleanroom conditions and in a vacuum is a challenge. Especially when it concerns high voltage electronics. In this case the customer needs a vacuum chamber that is able to test electronics under high vacuum (10-7 mbar). It is an ultra high purity application with a cleanliness of Grade 2 on the inside and Grade 4 on the outside. Read more

Flowmeting bibliotheek

July 22, 2022


July 15, 2022

Inventing and making specialty firefighting vehicles is what Innovative Fire Fighting Solutions (IFFS) is strong in. They focus mainly on systems for extinguishing water and hose systems. Fire trucks all have their own requirements regarding the amount of water on board, the flow and the distance over which water must be transported. For measuring the water flow, IFFS uses magnetic flow meters from Mecon. These are known for their accuracy. So why did they have a 30% deviation?

Micro Turbine Technology in low flow applications

March 19, 2022

In the sequence of our webinars about flow measurement techniques, we have added turbine technology. This type of flowmeter has a turbine, a rotor, placed axially that rotates faster as the medium flows through the instrument faster. Watch the video

Teesing biedt hightech klant een ‘zeer complete’ ondersteuning van de serviceorganisatie

July 23, 2021

Het is voor een klant die niets aan het toeval wil overlaten. Sinds twee jaar ondersteunt Teesing in Rijswijk diens serviceorganisatie en dat brengt heel veel logistieke handelingen met zich mee. Een zeer complete ondersteuning die Teesing graag ook andere hightech machinebouwers wil bieden. Lees verder  [Bron: linkmagazine.nl]

Hoe bouw je de meest efficiënte waterstofauto ter wereld?

July 3, 2021

Eco-Runner is het team van de TU Delft dat meedoet in de challenge om het meest efficiënte waterstofcel aangedreven voertuig te bouwen. Dat lukt ze heel aardig: ze hebben al 3 keer gewonnen met een auto die meer dan 2500km/kg rijdt op waterstof. Hoe doe je dat, zo’n ongelofelijk efficiënte auto bouwen? In 30 minuten laten we je het zien in deze opname van ons webinar. Bekijk de video

Verschildruk flowmeting: ouderwets of juist actueel?

April 17, 2021

Welke verschildruk flow elementen kennen wij nu eigenlijk? Genormeerd of niet-genormeerd? Maar vooral wat is de total cost of ownership? Neem deel aan dit webinar en leer meer over de verschildrukmetingen (dP meter), DP flow elementen, nauwkeurigheden en de selectie van het juiste element voor uw applicatie aan de hand van enkele praktijkvoorbeelden! Aan het einde van het webinar heeft u onder andere meer kennis van de berekening, mogelijkheden en aandachtspunten in uw applicatie. Bekijk de video

Waterstof tanken in china

March 4, 2021

Als het gaat over CO2 uitstoot en vervuiling wijst men vaak met de vinger naar China – het lowtech land met de zware industrie. Maar in het werkelijke klimaatverhaal is de situatie in China heel anders dan de meeste mensen beseffen. Terwijl we in Nederland op 4 plaatsen waterstof kunnen tanken, verkoopt de vestiging van Teesing in Beijing grote hoeveelheden onderdelen voor waterstof tankstations. Lees verder

Online configurator voor verdeelblokken

November 5, 2020

Als u een verdeelblok nodig heeft dan ontdekt u al snel dat standaard niet bestaat, of niet voldoet. Met onze online configurator stelt u zelf het verdeelblok samen, op basis van parameters zoals formaat, aantal poorten, kranen en materiaal.

Teesing levert bulk purifier aan de halfgeleider industrie

October 31, 2020

De behoefte aan schonere gassen neemt toe in de high tech industrie. Voor een maximale efficiëntie van diverse processen in de chip en semicon markt zijn schone gassen essentieel. Vaak worden gassen als CDA ( Clean Dry Air), CO2 en waterstof gezuiverd tot een aanzienlijk verhoogde downstream kwaliteit. Het gas bevat uiteindelijk nog maar heel weinig vervuiling < 0,1 ppb ( parts per billion) en heeft een zuivere kwaliteit van 99,9999999% (9N).

Test- en vulconnectoren

October 10, 2020

Teesing biedt samen met WEH een oplossing voor vrijwel iedere toepassing waar een snelle en veilige verbinding nodig is. De innovatieve test- en vulconnectoren hebben een directe lekvrije verbinding met producten voor het lektesten en vullen van vloeistoffen of gassen. Hiermee wordt erg veel tijd bespaart. Lees verder

Heat tracing voor hitte- of vriesbescherming

July 18, 2020

Teesing levert het complete pakket aan heat-tracingproducten. Teesing levert heat-tracingoplossingen voor het verwarmen, vriesbeschermen of op temperatuur houden van media in buizen, instrumentatie en andere processen.

Teesing Logistiek

May 26, 2020

Teesing heeft zijn order- en leveringproces geoptimaliseerd om snelle levering met een minimum aan fouten te verzekeren. Door het gebruik van lean liften die verbonden zijn met een geautomatiseerde order-en-voorraad systeem kunnen orders efficiënt worden verwerkt en real-time voorraad niveaus zijn altijd beschikbaar. Het Teesing magazijn heeft een grote voorraad beschikbaar waarbij de meeste producten geen minimale afname hebben. Lees verder

Teesing 360° VR Tour

April 23, 2020

Normaal gesproken zouden wij u graag welkom heten en rondleiden in ons pand. Echter, door het Covid-19 virus zijn wij genoodzaakt de gezondheid van een ieder te waarborgen. Daarom hebben wij een virtuele rondleiding gemaakt.

Teesing maakt met nieuw pand ‘kwantumsprong’ met state-of-the-art cleanroom en interne gerobotiseerde logistiek

March 9, 2020

Teesing is begin januari verhuisd naar een nieuw pand in Rijswijk – en dat is voor alle betrokkenen een feestje. Het bedrijf is internationaal leverancier van koppelingen, buizen, afsluiters, systemen en assemblages voor hightech toepassingen voor transport van vloeistoffen en gassen. Het oude pand, uit de jaren zeventig, was behoorlijk uitgewoond, zegt Bart Bakkeren, online marketeer bij het bedrijf met zo’n tachtig medewerkers. ‘Ons nieuwe pand is vier keer zo groot. We vinden het magnifiek.’ Lees verder [Bron: linkmagazine]


March 7, 2020

Er zijn vele meettechnieken (zie ook www.flowmeters.nl). Sommige technieken zijn bij uitstek geschikt voor gas en andere voor vloeistoffen. Niet alle flowmeters zijn even nauwkeurig. De ene flowmeter heeft bewegende delen, de andere flowmeter een geheel vrije doorlaat. Natuurlijk is er ook veel mogelijk op het gebied van toe te passen materialen. De kostprijs kan een bepalende factor zijn, maar ook de Total Cost of Ownership (TCO). Lees verder