Kolmeks is a Finnish company that produces high-quality inline centrifugal pumps. The pumps are made of cast iron and stainless steel with and without a built-in frequency converter. Originally designed for the Finnish wood industry, the pumps are known for using a particularly robust shaft sealing technology.

The strong construction has made the pump suitable for operation in green technologies and has therefore found its way into critical installations such as wind turbines and solar power plants.