About Blokland

Blokland Non Ferro Inc. is a business that has been supplying its mostly home made products to the pleasure cruising sector, the commercial shipping industry, and the industry in general for over fifty years.

In 1962, the founder of our company, Mr. J. Blokland, started his own production line in a small foundry, specializing in coolers, heat exchangers and rebuilding parts for marine engines. Because of his enthusiasm, dedication and technical know-how, our company has become a modern machine factory equipped with high-grade machinery. 

By now, the second generation has taken over the company. The company is a medium-sized business employing about thirtyfive competent workers.
We hope we can be of service to you, either the first time or again, with our broad range of products or technical advice on the application of our products.

But please feel free to contact us for specific orders, turning, maintenance, or repair and cleaning of coolers also.

Our company has earned an excellent reputation about which we are very careful!


In 1962 Blokland Non Ferro was founded by Mr. J. (Jan) Blokland. He started up in a small non-ferrous foundry. He started to develop and manufacture marinisation parts for diesel engines. Also the development of shell & tube heat exchangers was realised a few years later. Apart from that a line of stern gear systems and rudder assemblies for steel yachts becomes an important part of the business. At the end of the seventies the design and production of the boxcoolers was started. During the years Blokland Non Ferro has been developed into a worldwide operating company. Today the company is still family owned and Mrs. Corine Veenstra-Blokland is the managing director.


In the course of time, engineering is playing an increasingly important role in our company. Once started engineering in a 2D environment (AutoCAD), we are now fully working in a 3D design environment. Using 3D CAD computer software (Solid Edge), our engineers are continuously working on optimizing and expanding our product range. In addition, this gives us the opportunity to quickly respond to developments and questions which reach us out of the market. Developing and delivering customized solutions is increasingly common. Our skilled engineers are determined to find a solution to any challenge which may occur. To efficiently generate programs for our CNC machinery out of 3D models, we use EZCAM and FASTCAM computer software.


Amartech in Urk, well-known supplier of custom-made propulsion and rudder solutions was acquired by Blokland Non Ferro BV in early January 2014. Despite a successful mission, finishing the development of Controllable Pitch Propeller system, Balk has decided to sell. Amartech "Given the available knowledge and experience is the sale of part of the activities is a logical choice," said Daan Balk, managing director of Balk Shipyard.

Blokland Non Ferro BV is based in Sliedrecht (ZH) and is a leading player in the Dutch marine industry. Besides coolers and heat exchangers several decades propeller and rudder systems also have been manufactured.

A few years back Blokland Non Ferro BV already recruited two former managers of Amartech, Martijn Jouwsma and Bram Fase. With them the possibilities of development and production of high quality propulsion solutions increased tremendously within Blokland. Combined with its own production facilities and modern machinery of Blokland Non Ferro BV this creates an attractive combination of knowledge, experience and production. The acquisition of Amartech is a logical next step in this process. Extensive knowledge of both past and present gives the board of Blokland Non Ferro BV confidence that the activities of Amar Tech can be smoothly continued.

Blokland Non Ferro BV serves the market in a professional way with already known quality products and services, such as AxiSeals, Easy Stern/OptiProp shaft systems, Retractable propellers etc. The knowledge, experience and innovation which Amartech has built up in recent years, remain with the acquisition by Blokland Non Ferro BV ensured.

With this step Blokland Non Ferro BV sees the future with confidence and hopes for a fruitful cooperation with its relations . The business activities of Amartech have now moved to Sliedrecht.

From left to right; Daan Balk, Bram Fase, Martijn Jouwsma en Hendrik van 't Hul