MVSI-E in environments with potentially explosive atmosphere

by Italvibras

The MVSI-E series has been designed for use in industrial processes in environments with a potentially explosive atmosphere, due to the presence of gas and dust, in compliance with ATEX Directive (94/9/CE).  In particular, the MVSI-E series can be used in areas 1 and 2 (gas) and in areas 21 and 22 (dusts) according to the layout and following features:

Category:  ll 2 GD

Temperature class:  Gas:  T3 (200°C) or T4 (135°C)

EC certificate:  LCIE 06 ATEX 6092 X 

Zones of use:  1, 2, 21, 22

Technical features

Power supply

Three-phase voltage from 220V to 690V, 50Hz or 60Hz, suitable for use with an inverter from 20Hz to the base frequency with constant torque load profile tipo PWM. 


2, 4, 6 and 8 poles

Conformity with European Directives

ATEX 94/9/EC  Low voltage 2006/95/EC.

Reference regulations

IEC/EN 60079-0, IEC/EN 60079-7, IEC/EN 60079-31, EN 60034-1.


The compenents that affect protection are 100% accurately controlled and recorded.


Continual service (S1) at maximum declared centrifugal force and electric power. 

Centrifugal force

Range extended up to 11160 Kgf. (109KN), adjustable in a continuous linear mode with variation of the position of the eccentric weights.

Mechanical protection

IP66 according to IEC 529, EN 60529.

Protection against mechanical impacts

IK08 according to IEC 68, EN 50102.

Insulation class

Class F (155°C).


Standard on all vibrators, with vacuum encapsulation up to size AF 33 and 35, with "drop by drop" trickle system for larger sizes.

Ambient temperature

From -20°C to +40°C, on request it is possible to have vibrators for max. ambient temperatures and anti-condensation heaters.

Fixing of the vibrator

In all positions and therefore without restriction.


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-lubrication may be applied to size 35 and larger.

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.  Designed for maximum starting torques and torque curves specific to requirements of vibrating machines.  Insulated windings using vacuum encapsulating up to size 35; using the "drop by drop" trickle system with class H resin for larger sizes.  The rotor is die cast aluminium.


In high-tensile aluminim alloy up to size 60, in spheroidal cast iron for larger sizes.  Patented shape that improves heat dispersion and lowers normal working temperature at full load.  an external earthing screw is located on the casing as prescribed by Regulation IEC/EN 60079-0.

Bearing flange

Constructed in cast iron (spheroidal or grey) or in aluminium with steel bearing seat.  The geometry of the flange transmits the load to the casing uniformly.


Custom made with particular geometry, especially designed for Italvibras, suitable to support both high radial and axial loads. 

Motor shaft

In treated alloy (Isothermic hardening) resistant to stress.

Eccentric weights

Allow continual adjustment of the centrifugal force.  This adjustment is realized by a graduated scale, which expresses the centrifugal force as a percentage of the maximum centrifugal force.  A patented system (patent N°MO98A00194), called ARS, prevents adjustment errors.

Weight covers

In aluminium alloy.


Electrostatic surface treatment based on polymerised epoxy polyester powder in oven at 200°C.  Tested in salt spray for 500 hours.

Stainless steel protection

On request, corrosion high grade protection (stainless steel AISI 316L micro suspensions in a polyurethanic paint) is available.  

Several sizes are available with different mounting bolt patterns.  Please contact our office at 1-888-558-9956.