Reference: 109122
                
                                    
                        
                        
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                MOTORIZED 3-WAY ZONE VALVES. SERIES SF  These are powered by an  electric motor and can assume two operating positions depending on whether the motor is activated or not.   Valves are equipped with an external lever...
                
                
                                    
             
             
                             
                            
                                                            
                         
                             
                             
                             
                            