2019/11/13
ID: 2250

Flexible interfaces in plant engineering

Modular angle seat valve VZXA – individually adaptable and in safety block

Flexible, robust and offering high performance – the angle seat valve VZXA from Festo controls media flows quickly and reliably. Its carefully thought-out product design and patented interface enable valve bodies and actuators to be freely combined, with a hot-swap function for quickly exchanging actuator or other spare parts.

Different actuators and valve bodies can be combined for easy integration into the application. Individual, function-tested modules simplify the replacement of actuators during conversion or maintenance. The patented sealing system ensures it is both leak-proof and durable.

 

Simple installation

The unique interface between the modules means that the actuators can be replaced without opening the piping. The simple separation of valve bodies and actuators makes it easier and faster to install the valves in pipelines. As a result, in areas that are hard to access, the actuators can be mounted on the valve body at the end of an assembly task.

 

The spindle seal is in the form of a cartridge. It comprises a stainless steel sleeve with a preloaded chevron packing seal consisting of PTFE sealing rings and can therefore be replaced simply and reliably without the need for a special-purpose tool.

 

Sturdy materials

The angle seat valve VZXA comprises an angle seat valve body, a piston or diaphragm drive and a visual position indicator. The flow-optimised valve body made of stainless steel is available in the nominal widths DN15 – DN65. The variant with threaded connection is available; clamp connections and weld-ends in accordance with American and European standards are planned.

 

The stainless steel actuator is available in three sizes and with the control functions NC (normally closed), NO (normally open) and DA (double-acting). The maximum operating pressure, depending on nominal width, is up to 30 bar. The large visual position indicator is fitted as standard. Thanks to the transparent cover made of polyethersulfone (PES), using the valve in chemically aggressive environments does not pose a problem. Interfaces are provided together with internal ducts for the operating pressure to allow for subsequent adaptation of the positioners and valve control unit.

 

Safety blocks in the tyre industry

In the tyre industry, especially in the case of old tyre presses that no longer meet current standards, angle seat valves type VZXA with SIL and ATEX certification in safety blocks may offer an interesting solution. Blocks reduce leakages since, in contrast to using several individual valves, it has fewer connections. Customised blocks save space and can thus be fitted into very tight spaces. Open/closed positions can be sensed using process data or mechanical feedback. Blocks also make it possible to handle flows of multiple media such as steam, nitrogen or a vacuum.

Festo è sia un attore globale che un'azienda indipendente a conduzione familiare con sede a Esslingen am Neckar in Germania. Fin dagli inizi Festo ha stabilito degli standard nella tecnologia dell'automazione industriale e nella formazione tecnica, contribuendo così allo sviluppo sostenibile dell'ambiente, dell'economia e della società. L'azienda fornisce tecnologia di automazione pneumatica ed elettrica a 300.000 clienti dell'automazione di fabbrica e di processo in oltre 35 industrie. Il settore LifeTech con la tecnologia medica e l'automazione di laboratorio sta diventando sempre più importante. I prodotti e i servizi sono disponibili in 176 paesi del mondo. In tutto il mondo, circa 20.000 dipendenti in 61 paesi con oltre 250 filiali hanno generato un fatturato di circa 2,84 miliardi di euro nel 2020. Di questo, circa l'8% viene investito annualmente in ricerca e sviluppo. Nell'azienda che apprende, le misure di formazione e sviluppo rappresentano l'1,5% del fatturato. Festo Didactic SE è un fornitore leader di istruzione e formazione tecnica e offre ai suoi clienti in tutto il mondo soluzioni complete di apprendimento digitale e fisico nell'ambiente industriale.

© Festo SE & Co. KG
VZXA
Flexible, sturdy and offering high performance – the angle seat valve VZXA from Festo controls media flows quickly and reliably.
© Festo SE & Co. KG
Safety block
Save space and prevent leakages using several angle seat valves type VZXA in a safety block.