VSS range of pneumatic vibrators

VSS has available a range of ATEX-certified pneumatic vibrators.

While pneumatic vibrators are often thought of as being safe for use in explosive atmospheres, many still have metal to metal contact internally. In models in which a ball or roller runs around the inner race of the unit, the issue lies not in the actual running in the race but the ‘bounce’ that occurs when the vibrator is turned off and is running down.

Linear piston vibrators, even if non-impacting in design, can still have metal to metal contact when turned off.

VSS claims its turbine vibrators do not have this problem as the turbine is held in bearings so this ‘bounce’ cannot occur. The vibrators are also supplied with special fittings that make them suitable for use in Zones 1, 2, 21 and 22 and category 2 (2G and 2D 85°C [T6]).

Netter non-impacting NTS Series vibrators can be supplied with earthing straps, special inlets and exhausts to bring them into line with ATEX requirements for dust and explosive atmospheres.

The Netter PKL and NTP Series are impacting models that can be fitted with elastomer inserts that VSS claims eliminate metal to metal impacts. Using these inserts makes the vibrators compliant with ATEX regulations.