BUTTERFLY VALVE Serie BSV ... FEATURES Sturdy, compact construction, specially suitable for industrial applications Installation in any position. Mechanical position indicator. Lockable rotation angle from 0° to 90°. Without zero setting. External tightness by means of two "O" rings. Easy conversion on field from manual to automatic servicing. Wide range of accessories on request: manual control lever. 1 o 2 internal reductions with respect to the nominal diameter of the valve. Elliptic-shaped or moulded butterfly. VITON seals for air temperatures up to 110°C. TECHNICAL FEATURES Body and flanges : aluminium Stem : stainless steel AISI 303 Butterfly disc : aluminium Stem sealing : "O" ring in perbunan - NBR The butterfly valves of the series BSV are DVGW approved to the norms EN 161 and bear the Product - I D - Number. They are suitable to be used on residential and industrial combustion systems. They are particularly suitable for both manual and automatic control of gases belonging to the first, second and third family and of air. Installation with two threaded flanges ranging from Rp 3/4 to Rp 2. Max. pressure : 300 mbar Ambient temperature : -10 ÷ +60 °C for gas -10 ÷ +80 °C for air Flanges : threaded ISO 7-1:1982 from Rp 3/4 to Rp 2 Control ratio : 10:1

INSTALLATION AND MAINTENANCE INSTRUCTIONS 1. WARNING Installation, adjustment and maintenance of the valve must be carried out esclusively by skilled and authorized service technicians. Non proper installation, adjustment, changes, use and maintenance may cause damages to the personnel or to the equipment. Consequently it is necessary to respect strictly the following instructions and local prescriptions for both the installation of electric devices, in case of motorized valves, and of gas systems. 2. INSTALLATION 2.1 Make sure that all operating data indicated on the valve plates correspond...