MVB-E/MVB-E-FLC Explosion Proof Vibrator with top mounting flange

by Italvibras

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 (contact us for specifics) 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:

Technical 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 frequency 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 declared centrifugal force and electric power.

Centrifugal force

1500 Kgf.  (14.7 KN), adjustable with variation of the eccentric weights.

Mechanical protection

IP66 according to IEC 529, RN 60529.

Protection against mechanical impacts

IK08 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 possible 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 temperatures 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-lubrication 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.  Insulated 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 Regualtion 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 geometry, especially designed for Italvibras, suitable to support both high radial and axial loads.

Motor shaft

In treated steel alloy (Isothermic hardening) resistant to stress.

Eccentric weights

The weights are not provided in the delivery and must be ordered separately.  Lamellar for clamped centric weigths have an ample possibilty of adjustment;  the particular adjustment system adopted allows to obtain phase shift from 0 to 180° of the group of upper weights with respect to the group of lower weights and to have ample adjustment of the centrifugal force within the same group of weights.

Weight covers

Not envisioned in the MVB-E and MVB-E-FLC series.

Painting

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.

Please contact our office for the many certifications available. 1-888-558-9956.