Valves for Textile Chemicals

Special Valves for Special Applications: There's Two for Every Case

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The Initial Situation

With the introduction of a process control system in 2003 and the associated modifications of the processes for improving production profitability, also the valves were scrutinised and as far as possible standardised. The company focussed essentially on compact ball valves and V–port segment ball valves (so called segmented ball valves).

A lot of different ball valve and valve types in the plant require very individual operational supervision and control. Revisions were complex due to the many different valve types, time consuming and associated with an extensive stock of spare parts. The operating conditions were not perfect for most of the chosen types, which resulted in short operation periods with cost intensive revision interruptions.

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Corrective Measures

The analysis of the process conditions showed that two main types of valves are sufficient for all core processes. These types are compact ball valves and segment valves. The focus on these two types allowed a reduced spare parts inventory, longer service life cycles of the valves, shorter and less frequent revision interruptions which resulted in a significant cost saving throughout the production process. Especially in the case of the V-port segment ball valves, metallic and soft sealed versions were found suited for many applications.

Metal sealed versions have a considerable benefit as a control function, particularly with steam dosing systems and powder feeding into reactors. The production thus achieves greater flexibility and can manufacture a significantly wider range of products without approaching the limits of utilisation of the materials. And last but not least this flexibility allows Textilcolor to offer more specialised products from a single source and thus respond to the individual needs of the customer or to the diverse end products.

The said V–port segment ball valves are not only fitted with soft or metallic seals, but also operate as both on/off and control applications and additionally in different housing materials.

These requirements are guaranteed by the Zuercher Technik Company and the valve manufacturer JDV Control Valves. Zuercher Technik supported the user in case of any questions that arose. But how could these benefits be achieved? In a nutshell — through simple, robust and adaptable constructions, combined with the implementation of the most modern technologies, for example the HVOF coating process, as well as a simple but sophisticated seat construction.