Function; Atex Products; Category Limit; Permitted Materials - Nederman TAV 50 Manual De Instrucciones

EN Vacuum Valve TAV 50
EX label according to European Commision for EX products.
II Equipment group (non mining)
3 Equipment category 3, exterior of the product
D Dust
T=130 °C Maximum surface temperature
c constructional safety acc. to EN 13463-5
3.2

Function

TAV 50 is a valve for automatic opening and closing of a vacuum outlet linked to a central
vacuum system. It comes in six different models, see figure page 8. The valves are normally
automatic, they open and close governed by a control device.
The control device can be a solenoid valve for electric control or a flow sensing valve sensing
the flow to a compressed air tool. TAV 50 PC (basic version) is not fitted with its own control
device but an external 3-port valve is available as an option (see page 11). All versions are
compressed air powered except for MA which is manually operated.
TAV 50 can be fitted with a micro switch to control the vacuum unit (see accessories in
section 9. Accessories). The flow sensing valve (FV) is described in section 8. Flow Sensing Valve.
3.3

ATEX products

All versions of TAV 50 are marked with the CE label.
Depending on model and purpose of use, some TAV 50 also have the EX symbol and category
marking.
All TAV 50 marked with the EX symbol are category 3D equipment according to directive
2014/34/EU. This means that models with the EX symbol may be placed in areas classified as
zone 22 according to directive 1999/92/EC.
The manually operated TAV50 MA is not marked with the EX symbol as manually operated
equipment does NOT fall under the scope of the directive 2014/34/EU. Even if the TAV50 MA
does not have the EX marking, it is highly suitable for use in areas classified as zone 22 and share
the same high level of protection as the TAV50 with EX marking.
Please note that TAV 50 MV-W and TAV 50 MV 24 V AC/DC does not have the EX marking and
may not be installed is classified areas.
3.4

Category limit

The function of the TAV 50 is to be a part of an extraction piping system. Even if the TAV 50
with EX symbol is category 3D equipment for use in zone 22 (TAV 50 exterior), it can be used
with piping system internally classified as zone 20 or 21. As there is no internal ignition source
inside the TAV 50, it is to be considered as simple piping and does not fall under the scope of the
directive 2014/34/EU.
3.5

Permitted materials

The TAV50 is only intended to be a part of an extraction system transporting dusts with the
following properties: MIE (Minimum Ignition Energy) > 3 mJ and MIT (Minimum Ignition
Temperature) > 205 °C. Do not extract items that may cause ignition or blocking.
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