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(a) The pump is sucking the petrol vapour-air mixture from the atmosphere and is conveying it in pipe-work attributed to zone 0. Accordingly it is connected at its inlet and outlet to a potentially explosive atmosphere classified as zone 0.
The pump itself is placed in a one 1 environment.
With regard to the inlet and outlet connection the pump then has to comply with the requirements for category 1 equipment. The corresponding EC-type examination (equipment) has to be carried out by a Notified Body.
With regard to the remaining (outer) body and integrated parts of the pump the Notified Body includes the necessary category 2 assessment into the certification, even if there are only non-electrical ignition sources to be considered.
Both categories shall be indicated in the EC-type examination certificate, making however clear which aspects of the product have been assessed by the NB, and which have been assessed by the manufacturer alone, and in the marking.
For those category 2 parts of the pump, which show only non-electrical ignition sources and which are placed separately on the market, and for which the technical documentation has been communicated to a Notified Body, an EC declaration of conformity (for equipment) or a written attestation of conformity ( for components) of the manufacturer are sufficient.

(b) Often the pump is expected to prevent the passage of a deflagration flame from the inlet to the outlet connection, as typical vapour recovery pumps contain flame arresters in the inlet and outlet pipe. In this case the pump simultaneously may qualify as protective system (in-line deflagration arrester).
A Notified Body – after having carried out a corresponding assessment of the flame arresting capability – may then issue a separate EC-type examination certificate for the pump as protective system.
In case that both aspects (equipment and protective system) have been assessed by the same Notified Body, only one EC-type examination certificate may be released.