Home > Product > Ball Valve > Certifications & Approvals > ISO 5211 Standard for Actuated Ball Valves
If you’re planning to automate a ball valve with an electric or pneumatic actuator, you’ll want to make sure your valve follows the ISO 5211 standard. This international specification defines the mounting flange interface between a valve and its actuator—ensuring compatibility, interchangeability, and easy retrofitting without the need for adapters or custom parts.
At Perfect Engineers, all our actuator-ready ball valves are ISO 5211 compliant, making them plug-and-play for pneumatic, electric, and electro-hydraulic actuation systems.
ISO 5211 is an international standard that specifies the interface dimensions and connection features between industrial valves and part-turn actuators (like those used on ball, butterfly, and plug valves).
It standardizes:
🔧 In simple terms: ISO 5211 makes sure your actuator and valve fit perfectly together, regardless of brand.
| Valve Size (inches) | Typical ISO Mounting Pad |
|---|---|
| ½” – 1” | F03, F05 |
| 1” – 2” | F05, F07 |
| 2” – 3” | F07, F10 |
| 4” – 6” | F10, F12 |
| 8” and above | F14, F16, F25 |
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| Actuator Type | Compatible With ISO 5211? | Notes |
|---|---|---|
| Pneumatic Actuators | ✅ Yes | Spring return / double acting |
| Electric Actuators | ✅ Yes | On/off or modulating control |
| Electro-Hydraulic | ✅ Yes | High-torque or outdoor duty |
| Manual Gear Operators | ✅ Yes | For high-torque manual valves |
Mostly yes. But gear-operated valves also use ISO 5211 for ease of assembly and replacement.
Absolutely. Just remove the handle and install the actuator using the flange and stem interface.
You’ll need a mounting bracket or adapter kit—but we recommend matching them for direct fit.
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