Vibration Severity: VDI_3839_FANS
Machinery vibration severity evaluation criteria — zone boundaries (A/B/C/D) for bearing housing velocity (mm/s RMS) and shaft displacement (micrometers pk-pk) per ISO 10816-1/3, ISO 20816-1/2/3, ISO 7919-3, API 610/617/611/612, NEMA MG1, VDI 3839, and ISO 14694. Covers ISO 10816-3 Groups 1 and 2 (rigid and flexible mount), ISO 10816-1 Classes I–IV, API centrifugal pump/compressor/steam turbine limits, rotodynamic pump zones, hydraulic machine zones, reciprocating machine limits, fan vibration limits, general alarm/trip multipliers, and summary lookup records.
| standard class | zone or limit | description | machine group | mounting | notes | unit | zone A max mm s (mm/s) | zone B max mm s (mm/s) | zone C max mm s (mm/s) | zone interpretation |
|---|---|---|---|---|---|---|---|---|---|---|
| VDI_3839_FANS | ZONE_LIMITS | VDI 3839 fan vibration limits - bearing housing velocity | VDI_3839_Fan | any | VDI 3839 Part 1 fan vibration guidelines; bearing housing velocity measurement; consistent with ISO 10816-3 Group 2 flexible; applies to HVAC and industrial fans | mm/s RMS | 2.3 | 4.5 | 7.1 | Good: <=2.3 mm/s; Acceptable: 2.3-4.5; Monitor: 4.5-7.1; Unacceptable: >7.1 |
This is a sample. Search the full vibration severity dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE