Nederman NCF Series Instruction Manual

NCF
27
EN
• During maintenance operaons, suitable clothing must be worn, such as closely-ng
overalls and safety footwear, absolutely avoiding garments that are bulky or with
loose parts.
• During maintenance operaons on the fan, it is advisable to fence it o and to idenfy
it with signs with the wording: “FAN UNDERGOING MAINTENANCE”.
6.1 Visual inspecons on blades and casing
Periodical visual checks must be made for wear on impeller blades, given that deterioraon
of these parts can create a condion of extreme risk, due to the ejecon of the blade or the
failure of structural components, with consequences that may even be fatal.
To monitor phenomena of abrasion on impeller blades and the casing, use a portable lamp
to visually inspect components, slowly rotang the impeller to allow all blades to be seen.
Blades must be totally free from damage and must show no signs or abrasion or missing
secons.
With regard to the phenomenon of corrosion on impeller blades and the casing, corrosive
and acidic environments can reduce the thickness of fan safety components.
This phenomenon must not be underesmated, also because it does not depend solely on
the concentraon of aggressive agents.
Condensaon may form during pauses in fan operaon, and this may accelerate the
phenomenon of chemical corrosion, which in turn may alter the thickness of components,
aecng their integrity.
Table 6-1: Checklist - Dimensional checks on components
Components to check Type of check/
instrument
Criteria for acceptability Result
Impeller: blade thickness Dimension/Caliper Reducon of thickness no greater than 10% in an area without wear or
with paint undamaged
Impeller: thickness of impeller
disk
Dimension/Caliper Reducon of thickness no greater than 10% in an area without wear or
with paint undamaged
Casing: thickness of sides and
sheeng
Dimension/Caliper
or equivalent
Reducon of thickness no greater than 10% in an area without wear
Intake: thickness Dimension/Caliper Reducon of thickness no greater than 20% in an area without wear or
with paint undamaged
An-vibraon joints: thickness
of an-wear sheeng (if
present)
Dimension/Caliper Reducon of thickness no greater than 20% in an area without wear or
with paint undamaged
Welding (enre structure) Visual Absence of damage and cracks
Date:
Signature:
6.2 Checking and cleaning parts in contact with the uid
The fan impeller should be cleaned regularly to prevent vibraon caused by dust
accumulang on the blades during operaon. If the fan is used to pump even slightly dusty
air, air containing abrasive powders or for the pneumac transport material, the cleanliness
and wear of the impeller must be checked regularly. Dirt deposits on the impeller or wear
of parts of the impeller can cause undesirable vibraons during fan operaon. If any part of
the impeller is excessively worn, it is imperave that the impeller be replaced (for this you
must contact AB Ph. Nederman & Co’s technical assistance service). For any informaon
and before carrying out any modicaon to one of our fans, please contact the technical
and quote the part number found on the fan idencaon plate.

Nederman NCF Series Specifications

General

Brand	Nederman
Model	NCF Series
Category	Fan
Language	English