Festo's Modular and highly flexible VZXA Angle Seat Valves simplify application design

Festo's Modular and highly flexible VZXA Angle Seat Valves simplify application design
Festo AG & Co. KG (Germany) – Featuring a patented interface and award-winning modular product architecture.

Its wide variety of valve bodies and actuators can be freely combined for maximum configuration flexibility.

Festo, the leading supplier of automation technology, has introduced a highly adaptable angle seat valve, the VZXA. Featuring a patented interface and award-winning modular product architecture, its wide variety of valve bodies and actuators can be freely combined for maximum configuration flexibility. Engineers designing process applications in industries such as food and beverage, chemical, biopharma and industrial water can use the VZXA to control media flows quickly and reliably.

The VZXA consists of an angle seat valve body, a piston or diaphragm actuator and a visual position indicator. The robust, flow-optimised valve body is made of easy-to-clean stainless steel and available in nominal sizes DN15 to DN65. Connection variants include threaded, clamped or welded, to meet both US and European standards. Its high flow rate makes the VZXA ideal for highly viscous media: liquids, gases or vapours.

Stainless steel actuators are available in three sizes, with the control functions NC (normally closed), NO (normally open) and DA (double-acting). Maximum operating pressure, depending on nominal size, is up to 30 bar. The large transparent position indicator cap is made of polyethersulfone (PES), enabling the valves to be used in chemically aggressive environments.

The standardised interface between modules simplifies installation, allowing actuators to be replaced without having to remove the entire valve. Separation of valve bodies and actuators also makes installation of valves in pipelines easier and faster, particularly if orbital welding is required. The spindle seal is in the form of a cartridge, meaning it can be replaced simply and reliably without need for special tools.

“The VZXA easily adapts to diverse requirements, maximising flexibility and minimising the effort involved in designing your application,” says Kai Feller, product manager at Festo. “Its carefully thought-out modular product architecture allows different valve bodies and actuators to be combined for easy integration. And the self-contained, function-tested modules simplify system maintenance, modification or expansion – also making the VZXA well suited for designing customised valve blocks.”

The VZXA is quick and easy to clean inside and out as it has virtually no dead spaces. Its modular construction means the actuator can be easily removed and sterilised in an autoclave, for instance. The compact, sturdy and corrosion-resistant stainless steel unit can also withstand harsh ambient conditions, aggressive cleaning foams or vapour. The encapsulated modules and patented seal system prevent leakage of the operating medium into the actuator, or the compressed air contaminating the medium.

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