ADASH Ltd.
Adash 4300 – VA3Pro
For further technical and contact information visit www.adash.com, email: [email protected]
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ISO 10816 limit values
There is a wide range of valid standards but we would like to mention ISO 10816. It has several sections and it
also deals with procedures of obtaining limit values for particular machines. It contains 3 tables of values, which
are applicable for the A4300 – VA3Pro unit.
Classification according to machine type, nominal power or shaft height
Select the group which best describes the general size, type, and speed of the machinery being measured.
Note that these machine group classifications are set according to ISO 10816-3, which rates overall velocity
vibration levels for industrial machines with rated power above 15kW and nominal speeds between 120 RPM
and 15000 RPM when measured on site.
ISO Groups 1-4 classifications define the following types of machinery:
Group 1
Large machines (rated power above 300kW) with a shaft height greater than 315 mm.
These machines are
normally equipped with sleeve bearings.
Group 2
Medium-size machines (rated power from 15 kW to 300 kW) and electrical machines with a shaft height between 160
and 315 mm.
These machines are normally equipped with rolling element bearings.
Group 3
Pumps with multi-vane impeller and with separate driver with rated power above 15 kW.
Group 4
Pumps with multi-vane impeller and with integrated driver with rated power above 15 kW.
Classification according to foundation
An additional setting allows the specification (when defining the overall alarm levels) of measurements taken
from machinery with Rigid or Flexible foundations.
Evaluation ranges
The following evaluation ranges are defined for evaluation of the machine health according to vibrations:
Range A: New machine vibrations should be occasionally in this range.
Range B: Machines in this range can be operated for unlimited period.
Range C: Machines in this range are not acceptable for a long period of operation; they can be operated until
the repair time only.
Range D: Machines with vibration values in this range should not be operated. There is an acute danger of
damage to the machine.