The DUPLEX STRAINER consists of two identical strainers which can be operated alternatively  on  in  parallel  by  means  of  a  change-over  device.  The  Duplex  Strainer prevents  shut  down  of  a  plant.  All  duplex  strainer  are  constructed  from  MS  IS-2062. The change over the device is an international new design. The design is totally lndigeneious &  Bucket 304 Filter Area,  Butterfly Valve 4pcs