Conformity: Directive 94/9/EC (ATEX) EC-type Examination Certificate: LOM 02ATEX2034X Applicable standars: EN 50014, EN 50019 and EN 50281-1-1 Type of protection: EEx e II T6 Equipment classification: 2 Zones of use: 1, 2, 21, 22 Protection grade IP-65 (*) by standards UNE 20324, CEI 529 and EN 60529 Room temperature of use: -20ºC/+40ºC (under order -40ºC/+55ºC)). Series 3000-S boxes are suitable for containing terminals for junction systems. They must be installed according to the instructions of standards EN 60079-14 and EN 50281-1-2. MATERIAL. Box and cover are manufactured in stainless steel quality AISI-304 or AISI-316/316L, with 1.5 or 2 mm. plate thickness according to different sizes. SURFACE FINISH. This material does not need any protection treatment due to its technical features. It has a satin finish. CLOSURE. By means of stainless steel captive flush screws with a nylon washer, that ensures a perfect closure and avoid manipulation with tools different to those specifically made to tighten them. The screw is threaded on a stainless steel screw base that is welded in the box.