When is an electric butterfly valve the right choice, and when is a pneumatic one?
The choice between electric and pneumatic actuation depends on the available energy sources, switching times, and the area of application.
Electric butterfly valves – Ideal for plants without a compressed air supply. Available with 24 V DC/AC, 230 V and 240 V as well as analogue control signals 0–10 V and 4–20 mA for continuous control. Easy integration into PLC, building automation and SCADA systems. Slow to medium switching times (typically 15–60 seconds).
Pneumatic butterfly valves – For plants with an existing compressed air supply. Single-acting (spring-close or spring-open) for safe closing in the event of compressed air failure; double-acting for fast, precisely controlled switching movements. ATEX-compliant versions for hazardous areas. Very fast switching times (under 5 seconds) and robust in harsh industrial environments.
As a rule of thumb: electric for precise control tasks and plants without compressed air – pneumatic for fast switching, high cycle rates and ATEX areas.