B261

Fitting designed for street optic that uses metal-halide CDO-TT lamps 70 W and sodium-vapour lamps HST. The hemispherical optical assembly is made of turned sheet aluminium (thickness 2 mm) subjected to phosphochromatisation treatment with double primer, passivation at 120° C, liquid acrylic paint, baking at 150° C. The upper section of the body is equipped with a junction to the supporting arm that permits levelling the bowl. The lower section is housed by a black transparent silk-screened hardened protection glass 6 mm thick. For perfect tightness a black non-staining silicone gasket 50 Shore A is used that was subjected to post-cooling treatment (in the oven) 6÷10 h at 200° C. The glass is coupled to the optical assembly by stainless-steel fixing screws for fast opening (90° rotation with tool) and fast click closing by pressure. A steel retention cable (diam 1.2 mm) prevents the glass from falling off during maintenance and installation work. The assembly houses a polished 99.9% superpure aluminium reflector. The ceramic lampholder is equipped with an anti-loosening device for the light source. The cable clamp is made of black EPDM 65±5 Shore A rubber. No light flow is emitted from the upper section of the fitting. All screws are made of stainless steel (A2).

The optical assembly is applied by means of a 48-mm arm to the pole or the wall.;