ISO 5211 Mounting Pad Flange Dimensions
ISO 5211 is an international standard that specifies the mounting dimensions for actuator flanges used to mount actuators onto valves, providing a standardized interface. The dimensions are used primarily for industrial valve automation.
ISO 5211 Mounting Pad Flange Dimensions
The flange dimensions depend on the size of the valve and the actuator. The standard specifies both the bolt circle diameter and the number of mounting holes, as well as the diameter of the mounting holes.
Here’s an overview of the mounting pad flange dimensions for ISO 5211 for different actuator sizes:
| Actuator Size (DN) | Bolt Circle Diameter (D) | Number of Holes (N) | Hole Diameter (P) | Mounting Pad Thickness (T) | Central Hole Diameter (H) |
|---|---|---|---|---|---|
| 1 (small) | 50 mm | 4 | 10 mm | 12 mm | 25 mm |
| 2 | 60 mm | 4 | 12 mm | 14 mm | 30 mm |
| 3 | 75 mm | 4 | 14 mm | 16 mm | 40 mm |
| 4 | 85 mm | 4 | 16 mm | 18 mm | 45 mm |
| 5 | 100 mm | 4 | 18 mm | 20 mm | 50 mm |
| 6 | 120 mm | 4 | 20 mm | 22 mm | 60 mm |
| 7 | 140 mm | 4 | 22 mm | 24 mm | 70 mm |
| 8 | 160 mm | 4 | 25 mm | 28 mm | 80 mm |
| 9 | 180 mm | 4 | 30 mm | 32 mm | 90 mm |
Key Points:
- D: Bolt Circle Diameter (the diameter of the circle formed by the centers of the bolt holes).
- N: Number of holes (standard is usually 4 or 8 holes, depending on the actuator size).
- P: Hole Diameter (diameter of the mounting holes for bolts).
- T: Mounting Pad Thickness (thickness of the flange).
- H: Central Hole Diameter (the diameter of the hole in the middle of the flange, typically for the valve shaft or stem).
Note that the exact dimensions can vary slightly depending on the manufacturer and specific application (e.g., for larger actuators). Always confirm with the specific actuator and valve manufacturer or consult the full ISO 5211 standard for more detailed information or any specific deviations from the general sizing.
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