Vibration Severity: ISO_10816_6_RECIPROCATING
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ISO_10816_6_RECIPROCATING | ZONE_LIMITS | ISO 10816-6 reciprocating machines - bearing housing velocity | ISO_10816_6_Reciprocating | any | ISO 10816-6:1995 covers reciprocating machines including reciprocating pumps and compressors; significantly higher limits than rotating machinery | mm/s RMS | 2.8 | 7.1 | 18 | Zone A: <=2.8; Zone B: 2.8-7.1; Zone C: 7.1-18.0; Zone D: >18.0 |
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