ITALVIBRAS
72
H
B
N
MVB
-
E
/
MVB
-
E
-
FLC
The MVB-E and MVB-E-FLC flanged vibrator series have
been designed for use in industrial processes with screens
and sieves in environments with a potentially explosive
atmosphere, caused by gas and dusts, in compliance with
ATEX Directive (94/9/EC).
These vibrators can be supplied in B, C, D versions (see
page 70) according to the eccentric weights supplied with
the vibrator and to be mounted by the user.
In particular, these vibrators can be used in areas 1 and 2
(gas) and in areas 21 and 22 (dusts) according to the layout
and the following features:
Power supply
Three-phase voltage from 220V to 690V,
50Hz or 60Hz; suitable for use with a
PWM inverter from 20Hz to the base fre-
quency with constant torque load profile.
Polarity
4 poles.
Conformity with European Directives
Low Voltage 2006/95/EC,
ATEX 94/9/EC.
Reference Regulations
IEC/EN 60079-0, IEC/EN 60079-7,
IEC/EN 60079-31, EN 60034-1.
Controls
The components that affect protection are
100% accurately controlled and recorded.
Functioning
Continual service (S1) at maximum decla-
red centrifugal force and electric power.
Centrifugal force
1500 Kgf. (14.7 KN), adjustable with varia-
tion of the eccentric weights.
Mechanical protection
IP 66 according to IEC 529, EN 60529.
Protection against mechanical impacts
IK 08 according to IEC 68, EN 50102.
Insulation class
Class F (155°C).
Tropicalization
Standard with “drop by drop” trickle system.
Ambient temperature
From -20°C to +40°C, on request it is pos-
sible to have vibrators for max. ambient
temperature +55°C.
Vibrator thermal protection
On demand with PTC rated thermistor heat
detectors 130°C (DIN 44081-44082). Also on
request thermistors with different tempe-
ratures and anti-condensation heaters.
Fixing of the vibrator
In all positions and therefore without
restriction.
Lubrication
All vibrators are lubricated in the factory
and do not require further lubrication
if used in normal operating conditions
(“FOR LIFE” lubrication). In heavy duty
operating conditions periodical re-lubri-
cation may be applied.
Terminal box
Large fixed electrical connections.
Special shaped terminals allow to fix the
power supply cable, protecting it from
loosening.
Electric motor
Three-phase asynchronous type. Insula-
ted windings using “drop by drop” trickle
system with class H resin.
The rotor is die cast aluminium.
Casing
In spheroidal cast iron to have high
strength and optimal elasticity.
An external earthing screw is located on
the casing as prescribed by Regulation
IEC/EN 60079-0.
Bearing flange
Constructed in spheroidal cast iron.
The geometry of the flange transmits the
load to the casing uniformly.
Bearings
Custom made with particular geome-
try, especially designed for Italvibras,
suitable to support both high radial and
axial loads.
Technical features