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High pressure equipment service by KOKS Group

Service, maintenance and repair of high-pressure equipment and accessories by KOKS After Sales

As of 2025, all service, maintenance and repair activities previously performed by Doornbos Equipment in Rotterdam have been transferred to KOKS After Sales. This means you’ll benefit from the same trusted service and support — now combined with the technical expertise and innovative strength of KOKS Group.

Discover more about:

  1. Maintenance of high pressure equipment

  2. Inspection and certification

  3. Repair and emergency service

  4. Our service locations

  5. Safe high pressure operation

Maintenance of high pressure cleaners and accessories

Regular maintenance is essential for high pressure cleaners, high pressure pumps, high pressure guns, complete high pressure systems and other related equipment. Proper maintenance prevents downtime, extends the lifespan of your machinery, and minimizes safety risks.
KOKS After Sales ensures your equipment performs optimally and operates safely, keeping your industrial cleaning operations running smoothly and efficiently.

The necessity of timely maintenance and inspections

High pressure pumps, guns and opther systems are exposed to heavy loads during operation. Dirt, wear and pressure fluctuations can lead to safety risks, malfunctions, or costly downtime.

If maintenance and inspections are not performed in time, issues such as the following may occur:

  • Leaks or pressure loss, reducing system efficiency
  • Clogged filters or nozzles that decrease cleaning performance
  • Wear on pump components (including lobe pumps), causing mechanical stress or failure
  • Risk of accidents from sudden hose or tool detachment
  • Financial consequences, such as fines, insurance issues or downtime costs

Timely maintenance is therefore essential to guarantee the safety, performance and reliability of your high pressure equipment.

Periodic maintenance and overhauls of high pressure equipment

Our service team performs both periodic maintenance and complete overhauls to keep your high pressure systems reliable, safe and efficient.

During periodic maintenance, we check and clean filters, nozzles, hoses and couplings, lubricate moving parts and inspect for leaks and wear.

For complete overhauls, all components are thoroughly inspected, seals and bearings are replaced when necessary, and pumps are tested to guarantee optimal performance. Regular maintenance and overhauls extend the lifespan of your equipment, prevent unexpected failures and reduce costly downtime.

Mobile service and rapid on-site support

In addition to service in our Alkmaar and Pijnacker workshops, KOKS After Sales provides mobile on-site support. Our fully equipped service vehicles carry all necessary tools and materials, allowing us to repair or maintain your high pressure equipment directly at your location.

Combined with our 24/7 emergency service, you can always rely on fast intervention wherever your operations take place.

Inspection and certification of high pressure cleaners and accessories

Safety and reliability are essential when working with high pressure equipment. Through regular inspections and certifications, you ensure that your equipment complies with the highest standards and regulations, such as the SIR guidelines. KOKS After Sales offers professional testing and certification services, so you can work safely and keep your equipment fully compliant.

SIR-certified high pressure inspections

Our SIR-certified inspectors perform thorough examinations of high pressure equipment, including pumps, cleaners, hoses, complete systems and related accessories. During these inspections, every component is tested to verify that it meets current safety and performance standards. This ensures your equipment operates at peak performance and that your team works in accordance with the strictest industry safety regulations.

High pressure testing capacity up to 6,000 bar

Our workshops in Alkmaar, Pijnacker and Saudi Arabia are equipped with advanced test facilities that are capable of testing and certifying high pressure accessories such as hoses, lances, guns, swivels, rotating nozzles, pipe cleaners, foot pedals, manifolds and tank cleaning heads at pressures up to 6,000 bar.

This allows us to accurately measure performance, pressure resistance and reliability of each system, ensuring that your equipment is ready for safe and demanding industrial use.

Repair and emergency service for high pressure equipment

At KOKS After Sales, you can rely on professional repair and emergency services for all your industrial high pressure equipment. Our experienced service team supports customers across the Netherlands, Belgium, the United Kingdom and Saudi Arabia, both on-site and from our fully equipped workshops. From complete high pressure systems to individual components such as pumps, hoses and accessories, we ensure that breakdowns are resolved quickly and professionally, minimizing downtime and maintaining productivity.

Repairs of high pressure cleaners and accessories

Our skilled technicians perform fast, reliable repairs on all types of high pressure equipment, including leaking hoses, malfunctioning pumps and defective guns. Using original parts and advanced testing facilities, we restore the performance and safety of your machines. Our team has extensive experience with brands such as:

  • HAMMELMANN
  • WOMA
  • Kärcher
  • DIBO
  • Falch
  • NLB

24/7 breakdown service for high pressure equipment

KOKS After Sales offers a 24/7 breakdown service for critical situations where immediate maintenance or repair is required. Whether it concerns a pump failure during production, a leakage during a plant stop, or a malfunctioning high pressure gun at a shipyard, our technicians are ready to respond quickly on-site to get your operations back up and running safely and efficiently.

Our high pressure service locations

KOKS After Sales operates multiple service centers and workshops in the Netherlands, Belgium, the United Kingdom and Saudi Arabia. With modern facilities and specialized equipment, we provide high quality maintenance, testing and repair services for all types of industrial high pressure systems.

The following locations provide service:

Teesside

7 Daimler Drive, Cowpen Lane Ind. Est.
Billingham, TS23 4JD
United Kingdom
+44 (0)1642 566360

Jubail

Light Industrial Area
AI Jubail
Saudi-Arabia
+966550744884

Safety in high pressure work

Safety is of vital importance when working with high pressure equipment. Incorrect operation, inadequate maintenance or insufficient knowledge can lead to equipment damage, serious injuries or even fatalities.
KOKS not only supports you with maintenance and service, but also with the right training, certification and personal protective equipment to ensure that every job is performed as safely as possible.

SIR certification courses at INEDCENTER

At INEDCENTER, safety in high pressure operations takes center stage. Operators and technicians learn how to work safely and efficiently with high pressure pumps, hoses and cleaning systems. The practical training programs are based on the Stichting Industriële Reiniging (SIR) guidelines, which set the safety standard for industrial cleaning in the Netherlands and Belgium.

By completing high pressure courses at INEDCENTER, operators enhance their knowledge and skills while demonstrating their competence to handle high pressure equipment responsibly — an essential step towards a safe and professional working environment.

Personal protective equipment from TST Sweden

High pressure cleaning comes with significant risks — a defective gun, burst hose or sudden movement can cause severe injury. That’s why full body protection is essential for anyone working with high pressure systems.

Safety is a top priority at KOKS, and we are proud to be an official dealer of TST Sweden, the leading brand in personal protective equipment for high pressure work up to 3,000 bar.
The product range includes protective suits, gloves, boots, leg protection, face shields and hose protection.

Visit our webshop to explore the full range and make sure your team works safely and professionally at all times.

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