Development & History

From a one-man company to market leader – that's the best way to describe the development of Knocks FLUID-Technik GmbH. Heinz Knocks founded the company in 1970 and it is still run by the family to this day. Starting out as a small project in a basement room, the company has developed to become an international operation with an unbroken stream of product innovations that continues to grow through the constant yearning to research of a true technology leader. That's exactly how our striving for perfection in quality management continually grew. In 2004 the company gained ISO 9001:2000 certification as a logical consequence. Our state-of-the-art machinery and expert employees have enabled us to maintain this level of quality up to the present day and we continue to improve on it every day.

Team & Employees

We are proud of the outstanding quality of the products that we ship from our company, which is also due, of course, to the great commitment of our employees. Approximately 200 employees are currently engaged in production, assembly, shipping, purchasing, development, sales and marketing in Selm – a large team that takes our customers' issues both personally and seriously. This optimal number of staff enables us to complete projects within a short time. Our experienced teamwork means we are also able to implement more complicated projects with great efficiency. At KNOCKS, each employee is familiar with the work of their colleagues, enabling them to plan correspondingly with foresight and think ahead. That is what we call teamwork!

Location & Plants

The company headquarters in Selm offers our customers everything they need from one source: This is where we develop, design, produce and sell our pressure regulators, filters and lubricators, minimising the time spent on product development and a direct link between research and practical use. Our customers benefit every day from the resulting fast, favourable response times, also made possible due to the very latest production machinery and QA systems. Electronic testing equipment and 3D CAD systems are just two examples.


From Selm to the world – and vice versa. Its expertise and know-how has made KNOCKS an internationally coveted brand throughout the world. Distance is no object for us when it comes to providing personal service. Here you will always find the right contact immediately. We quite frequently host international customers at our headquarters in Selm. Why not visit us here in Selm as well, view our production facilities and get to know us personally.

KNOCKS service

Everyone claims to provide genuine service.
We actually do it!

Personal contact has top priority for KNOCKS service. However, many enquiries and problems can be solved quite pragmatically with other types of support: and that’s why we provide you with a wide range of information on the topic of KNOCKS fluid technology on our service pages. You will find practical operating and installation instructions to support you with handling our products. For any further questions, please don’t hesitate to contact us personally!

more information

“For me as a designer and developer, direct proximity to the production process is incredibly valuable. Theory is turned into practice right in the next room.”
Martin Statkewitz, KNOCKS Managing Director


We provide what you need:  Products,
service and quality
made in Germany.

You can fully rely on KNOCKS: We help you select the right solution from the over 6,500 products we stock and, with the help of intelligently designed intra-logistics, can reliably deliver it upon request. We also develop, sample and produce specifically customised applications and manufacture pre-configured assemblies to meet your requirements. Whatever we can do for you – we are guaranteed to find a solution!


Our philosophy
Quality and service.


What do we focus on?
Your needs, of course!

Personal contact, short communication channels, long-term partnerships – we at KNOCKS put our service into practice instead of just talking about it. We don’t just offer you any old suitable product – but the right one! That might be any one of 6,500 standard products – or a product especially developed to meet your requirements. We advise you. We carry out comparison measurements. We deliver just in time and we develop our product ideas to suit you! In short, we focus on your needs.

Working methods

For outstanding quality.

At KNOCKS we work according to strict quality guidelines. No product leaves our Selm manufacturing plant without having been put through its paces. For this purpose, we make good use of numerous technical testing equipment and test measurements. Nevertheless, despite all the technology, our experienced employees are indispensable above all. They take every single one of our customers’ requests seriously and deal with them promptly and conscientiously. This enables us to process projects simply, quickly and in a straightforward manner – in our customers’ best interest.


Pioneering. Individual. Close.

KNOCKS stands for long-term orientation. Our solutions aren’t only developed for today but also need to endure tomorrow. That’s why the highly qualified engineers in our research and development department look ahead in a spirit of innovation. We want to take you with us on our journey to a successful future and continue developing – together with you. Ask us any question, test us with new suggestions and requests over and over again. Present us with problems, which we will be happy to solve.

Everything from standard products to services

KNOCKS product finder

Where over 6,500 products are waiting for you!
Air pressure regulators and filters are our speciality! That’s why our more than 6,500 standard solutions from three series are certain to include one that exactly meets your requirements and your sector. If not, we will develop it for you.

KNOCKS product finder

Where over 6,500 products are waiting for you!

KNOCKS industries

The right solution for any requirement.
Every industry has its own rules. KNOCKS has understood that and thus specialised in supplying various industries with the suitable products and the right features.

KNOCKS industries

The right solution for any requirement.

KNOCKS custom-made

Custom-made solutions – fast, convenient, straightforward.
As innovation leader in the field of air pressure regulators and filters, our develop­ment expertise helps us to understand that each machine and each sector can be so different that providing a standard solution is sometimes out of the question. We therefore respond individually to your requirements and, thanks to our in-house development and laboratory, we manufacture products that are 100% compatible with your system. This also applies to small quantities and if things have to move quickly. Leave it to us!

KNOCKS custom-made

Custom-made solutions – fast, convenient, straightforward.

We are at your service worldwide.

From Selm out into the big wide world – with expertise, knowledge and dedication, KNOCKS Fluid-Technik GmbH has extended its reach from Germany's Münsterland to all the continents of the world. The down-to-earth, Westphalian brand is now marketed by trading partners all over the world. KNOCKS cultivates its many long-term trading partnerships in an intensive, trusting manner.  

KNOCKS serves its customers and partners on an international basis and is prepared to travel long distances in order to provide genuine personal service and the best possible advice. All pressure regulators, filters and lubricators made by KNOCKS are of outstanding quality – made in Germany. You too can benefit from this quality.


United Kingdom
Hong Kong



South Africa
Czech Republic  


Flow sensor KDDM-2

Originally developed from a customer requirement, now it can also help reduce your operating costs.

If you don't ask you won't find out!

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