High pressure hose sales transferred to KOKS Group
Doornbos integrated into KOKS Group for the sales of high pressure hoses up to 4,000 bar
Since early 2025, the sales, maintenance, and inspection activities of Doornbos Equipment in Rotterdam have been integrated into KOKS After Sales. From now on, you can rely on our webshop and our After Sales colleagues for the purchase, maintenance, repair, and certification of your high pressure hoses.
Read on for more information about:
- Choosing the right high pressure hose.
- The high pressure hose range at KOKS.
- High pressure hose repair services at KOKS.
- High pressure hose testing and certification at KOKS.
- Working safely with high pressure.
Choosing the right high-pressure hose
Selecting the correct high pressure hose is crucial for safe and efficient operations. A perfect match with your high pressure setup is essential to achieve optimal performance. The high pressure hose is a vital link in this chain.
When should you choose a rubber hose or a thermoplastic hose? KOKS is here to assist you in configuring the complete high pressure system — from the pump unit all the way to the nozzle!
When to use a rubber high pressure hose?
Rubber high pressure hoses are highly reliable, especially for transport applications on vehicles or trailers. They offer excellent heat resistance and are often the most cost-effective solution. However, they are heavier than thermoplastic hoses.
Advantages of rubber hoses:
- Higher temperature resistance up to 100 °C
- Generally more affordable than thermoplastic hoses
- Well-suited as transport hoses
Disadvantages of rubber hoses:
- Heavier than thermoplastic hoses
- Limited maximum pressure of 1,250 bar
When to use a thermoplastic high pressure hose?
Thermoplastic high pressure hoses are ideal for specialized applications where flexibility and pressures from 900 up to 4,000 bar are required. They are lighter, more abrasion-resistant, and can handle higher pressures than rubber hoses.
Advantages of thermoplastic hoses:
- Lightweight
- Greater abrasion resistance
- Higher maximum pressure up to 4,000 bar
- Can be manufactured in unlimited lengths
- Wide range of configuration options
- High flexibility
Disadvantages of thermoplastic hoses:
- Typically lower temperature resistance (up to approx. 70 °C)
- More expensive than rubber hoses
Conclusion: Choose rubber hoses for transport applications, and thermoplastic hoses for specialized and demanding tasks such as bundle cleaning, tank cleaning, and concrete demolition.
The high pressure hose range at KOKS Group
At KOKS, you will find the same high pressure hose range previously offered by Doornbos, expanded with the premium-quality KOKS hoses. As a member of the Industrial Cleaning Foundation (SIR) and with access to state-of-the-art testing equipment, KOKS guarantees safe and fully certified high pressure hoses.
Parker Polyflex thermoplastic high pressure hoses from 900 to 4,000 bar
KOKS is a proud distributor of Parker Polyflex high pressure hoses, one of the world’s leading manufacturers of thermoplastic hoses and fittings.
Our extensive Parker Polyflex range covers diameters from DN-4 up to DN-25 and working pressures from 900 up to 4,000 bar, meeting the requirements of virtually all applications
KOKS rubber high pressure hoses up to 1,250 bar
The KOKS rubber hoses are lightweight, compact, and reinforced with steel braids for heavy-duty industrial use. They are available in working pressures of 1,000, 1,200, and 1,250 bar and withstand temperatures up to 100 °C. Well above the ISO 1829-2 standard requirement of 70 °C.
These rubber hoses are more affordable than Parker Polyflex thermoplastic hoses and are therefore often chosen by our customers as transport hoses.
Rubber hoses up to 500 bar at 95 °C or sewer hoses needed?
KOKS also supplies hoses from 100 up to 500 bar, suitable for hot water applications up to 95 °C. These hoses are often used in combination with the KOKS Hotblast and various Kärcher high pressure units.
In addition, our range includes a wide selection of sewer hoses for pipe and drain cleaning.
Assembling, repairing, or certifying high pressure hoses at KOKS Group
KOKS After Sales is member of the Industrial Cleaning Foundation (SIR) and employs SIR-certified inspectors. Our service locations in Pijnacker and Alkmaar feature a unique test bench capable of testing high pressure equipment up to 6,000 bar. All work is carried out in strict compliance with SIR safety standards, ensuring safe and certified solutions.
Thanks to our advanced assembly facilities, we can produce high pressure hoses fully customized for countless industrial applications.
Industrial high pressure hose repair
Is your hose damaged or is a coupling leaking? KOKS After Sales in Pijnacker and Alkmaar also provides expert repair services. In many cases, our specialists can restore your hose without the need for immediate replacement. Using advanced techniques and high-quality materials, we ensure your hose is returned to optimal working condition.
Each repaired hose is thoroughly tested and inspected according to strict SIR standards, guaranteeing safe and reliable operation.
High pressure hose testing and (re)certification
At KOKS After Sales, we ensure your hoses always comply with the highest safety standards, such as ISO 1402 and the latest SIR regulations. Our SIR-certified inspectors handle the entire inspection and (re)certification process.
With our modern testing facilities, we carry out precise inspections and pressure tests, ensuring your hoses maintain their rated pressure capacity and function reliably. This guarantees safe operation in every workplace.
Plan your inspections on time to ensure your hoses remain certified and compliant.
Working safely with high pressure
Safe operation with (ultra) high pressure is essential to prevent damage or serious injury. To work safely with high pressure, three requirements must be met:
- Product knowledge
- Process knowledge
- Personal protective equipment (PPE)
At KOKS Group, we can provide you with both the knowledge and the equipment required to work safely and in compliance with SIR standards.
Product and process knowledge for your own safety!
Working with (ultra) high pressure involves major risks. Knowledge of pressure values and temperature ranges, for example, in combination with the properties of the high-pressure equipment to be used, is crucial to prevent accidents and damage.
It is also important to understand how high-pressure pumps, hoses, couplings and safety systems work together. What procedures apply for safe connection, testing and disconnection? And how can pressure peaks or leaks be quickly identified and resolved?
At the INEDCENTER training institute, you can expand your knowledge of working safely with high pressure under the guidance of experienced instructors. INEDCENTER is also the right place for your SIR certification.
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Personal protective equipment from TST Sweden
During high pressure work, the lance and hose are in close proximity to the operator’s body, particularly the side area, which is at risk if the hose disconnects unexpectedly. With the proper PPE from TST Sweden, you can work safely and protect yourself against injuries.
For example, the Scuff Guard extends the service life of your hose by preventing wear from abrasion, cutting, or impact, while the Whip Stop prevents injuries or damage caused by a whipping hose.
In addition to advising on safe system setups, KOKS also supplies these reliable safety accessories to support safe high pressure operations.
Explore our range or contact us
Whether you choose Parker Polyflex thermoplastic hoses or our own KOKS rubber hoses, you can always count on safe, durable, and certified solutions. Beyond supplying hoses, we also support you with maintenance, inspections, and protective equipment from TST Sweden.
This ensures reliable quality and expert advice, allowing you to work safely and professionally.
Discover our full range in the webshop or contact us directly for tailored advice.