ATEX Directive 2014/34/EU (Article 2, §1) and ATEX Guide (§38) specify that equipment and simple pipe components, such as manual valves, check valves, mesh filters, pressure regulators, safety valves, are not covered by the directive, as they do not have their own potential source of ignition. Therefore, these components do not require certification to be installed in hazardous environments, but still, the components with antistatic protection should be used.
Only the valves with an actuator (electric or pneumatic) are subject to ATEX Directive.