2 min

Exhaust valves better than new

Exhaust valves better than new

The challenge

Via one of our customers, we received two valves (so-called exhaust valves) from huge marine diesel engines. An exhaust valve is a valve that releases burned gases from a cylinder. Both valve stems were seriously damaged, so they asked us to repair them both. The valve stem handles controlling the valve during its upward and downward movement. This must be done perfectly especially during the upward movement, otherwise the valve will not close properly and may begin to leak.


First, the valve stem is pre-processed, then we provided the valve stem with a wear-resistant carbide coating. Last, we grind/polish the valve stem to the optimum diameter and roughness. A great advantage is that the optimum roughness in the coating surface can be "tuned" which will optimize the running qualities further. This ensures minimal wear of bearings and seals due to minimum friction. The exceptional wear resistance of the coating ensures that the roughness also stays in the coating. As a result, the running properties are and remain better than new for a long time.

No items found.


HVOF Spraying

Learn more


Learn more

How can we help?

Please fill in the form to get in contact with one of our specialists.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Trusted by the industry

Discover unmatched piston rod protection.
Request Quotation
Fill out the form to request a quote.
Request a quote