-21 -
VARVEL
IUM
DIRECTIVE 94/9/CE - (ATEX)
9.6
ATEX Marking
The Varvel Series RC, RD, RP, RS, RT, XA, VR are according to design requirements asked by Group II, Category 2 and
to operate in areas with explosion danger of gas (Zone 1 and Zone 2) and of combustive dusts (Zone 21 and Zone 22).
- Temperature class and Surface temperature: see below
- Dust accumulation: max. thickness on surface 5 mm maximum (EN50281-1-2)
- Carter: IP66 (Ingress Protection)
The VARVEL-ATEX products are identified by the following technical files:
- Series RC “ATEX 03RC”
- Series XA
“ATEX 03XA”
and marked
II 2 GD ck IP66
- Series RD “ATEX 03RD”
- Series RS “ATEX 03RS”
T
max
=120°C or
- Series RP “ATEX 03RP”
- Series RT
“ATEX 03RT”
T
max
=135°C T
amb
-20/+55 °C
- Series VR “ATEX 03VR”
and marked
II 2 GD cb IP66
T
max
=185°C or
T
max
=200°C T
amb
-20/+55 °C
where :
II
-
Group II (surface industries)
2 - Category 2
G - Explosive atmosphere with presence of gas, vapours or clouds
Zone 1 (2G) and Zone 2 (2G or 3G)
D - Explosive atmosphere with presence of dust
Zone 21 (2D) and Zone 22 (2D or 3D)
T
max
- Max. Surface Temperature
b - Trigger Source Control
« b »
T
amb
- Ambient Temperature
c - Construction Safety
« c »
ATEX 03XX - Deposited Technical File Ref. No.
k - Dipping in liquid
« k »
IP66
- Protection
9.7 Maintenance Servicing
The rigorous observance of maintenance intervals is recommended to ensure appropriate working conditions and
explosion-proof protection.
•
GEARBOXES
According to working conditions:
Elimination of any dust accumulation thicker than 5 mm by means of a vacuum cleaner.
Every 500 working hours or every month:
Visual inspection of oilseals to monitor any lubricant leakage.
Every 3000 working hours or every 6 months:
Inspection of oilseals and replacement if considerably used.
Every 5 years:
Replacement of synthetic oil.
•
VARIATORS
For variators VR, consider also the following prescriptions
According to working conditions:
Replacement of friction ring if worn out.
Every 3000 working hours or every 6 months:
Inspection of the angular play of output shaft,
the integrity of oilseals and corrugated hood,
the right operation of monitoring device of output shaft rotation (antiskid device),
the over-temperature of variator housing (
≤
80 K in comparison with T
amb
).
Every 6000 working hours or every year:
Replacement of friction ring.
ACNH B.V.
http://www.wentellagers.nl
