Dear Atul,
i can not down load the file, any way i got the drawing from your e-mail, please find the comment at below , which i also sent you via the email earlier,

By looking at the shower head,

We think that steam Jacket need for the shower head, which we understand the materials will be very difficult to handle once it gets a bit cool. 
we also doubt on the pressure resistant caused by this shower head, the pump may not be powerful enough to extrude the materials out of this shower ahead, have you verified with the Maag pump people 
Can the hole plate be designed as grating type, which it has large opening area and better strength. However, we may not be able to have the outlet materials as fine as 1mm diameter. 
