Vessels include Millennium-class ships currently deployed in the US such as Celebrity Millennium, Celebrity Infinity, Celebrity Summit and Celebrity Constellation.
As part of the four-year agreement, Valmet will boost the performance, safety and availability of the systems.
Data analytics capability of the systems will also be improved.
Celebrity Cruises Global Marine Operations Global Technical Solutions vice-president Anders Aasen said: “Cooperation with Valmet has been smooth. Over the years, we have seen the evolution of their automation system.
“With our service agreement, we are able to get the latest technologies on-board and training for our operators.”
Celebrity Cruises, which is part of Royal Caribbean Cruises, currently operates a fleet of 12 ships to provide luxury vacations across seven continents.
Valmet North America Energy and Process Systems director Juha-Pekka Jalkanen said: “We have set high priority on reaching the minimum risk level.
“For example, our services protect the automation system and ensure its safe operation.”
Valmet has developed a comprehensive life-cycle management approach for the customers who use its automation systems.
The company conducts audits, life-cycle plans and crew competence to support customers.
Valmet primarily develops and provides process technologies, automation and services for the pulp, paper and energy industries.