Name: DN100 Stainless Steel Manual Welding Butterfly Valve with Pulling Handle

Working Princliple

This kind of valve can be handled both by manual or an electric actuator and also can be operated by a pneumatic actuator.                                                                         
Electirc actuator or penumatic actuator is to covert the axial movement of piston to be 90° rotation of valve shaft.So that the valve can be open or close to achieve the requirement of control and open/close for the pipeline system.They have three type of actuator:normally open(NO),normally closed(NC) ,air/air(A/A).                                                                                                                                                                                                                                     
Multi-position handle regulates the valve by 15° in its open or close 12 seat and achieve control of medium flow purpose.                                                                          
Pulling handle regulates the valve through four multi-function positioning,in its open or close four position and also achieves control of medium flow purpose.