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FCC Slide Valve Overhauling and Maintenance

Over the last 30 years Remosa has gained considerable experience in modifying, overhauling and retrofitting FCC slide valves. Most of these valves were not originally manufactured by Remosa. In many cases, the substantial modifications introduced by Remosa allowed a longer operating life of the valves.

The evolution in valve design has greatly influenced the maintenance and overhauling methods. Ten to 15 years ago, 80% of the valves operating in FCC units were the hot wall design, flanged type. These valves could be removed easily from the line and repaired at a qualified workshop under Remosa supervising. Since then, the percentage of valves flanged to the line has drastically decreased to the advantage of the cold wall design, welded to the line valves. For understandable operating reasons, these valves cannot be removed from the line for maintenance or overhauling purposes.

By the time these different needs surfaced, Remosa had already designed and built some portable machines [photos] which could be installed inside the valve to perform any type of repair work. Together with the high-qualified expertise of our supervisors - who know what type of welding, hardfacing, refractory, machining or repair is required - these portable machines have successfully gained our FCC customers' approval by solving many problems which were regarded difficult to tackle.

In addition, the new Remosa-manufactured valves have been designed considering any possible maintenance problem. Remosa provides technical assistance to the refinery personnel responsible for turnarounds. Preliminary meetings are held to discuss any problem experienced during the valve operating life. Then Remosa prepares a technical recommendation providing the solution to the specific problem.

During the last five years, Remosa has successfully performed repair works and maintenance all over the world, from the mouth of Rio La Plata, Argentina to the desert in Saudi Arabia, to Manaus in the heart of the Amazonian Forest, to Mendoza in the Cordillera of the Andes, and many others.

About 200 valves have been repaired, overhauled or retrofitted by Remosa and we are very proud to have filled our data base with experience and above all to have exported our brand name and know-how which, in many cases, have brought our customers to prefer Remosa to the original valve manufacturer.

A brief description of the most important and difficult field service cases is provided as reference: please check the problems & solutions page.

Copyright © REMOSA spa 1998-2001 Last updated on April 23, 1999