HDPE Penstock type PRA-FI (Flush invert)
The bottom seal is made of polyurethane, the EPDM seal is placed in the frame plate and forms one continuous piece with the bottom seal.
End valve in sewer systems, waste water treatment plants etc.
5 Mwc on- and off-seating pressure from bottom of invert.
higher pressures on request.
if a rectangular penstock is required with a dimension in between a hundredfold in mm, the outside dimensions of a penstock with first coming hundredfold in mm will be followed.
For instance a penstock with opening dimensions 315 x 475 mm will follow the outside dimensions of a penstock with dimensions 400 x 500 mm (so X=400+300 and Y=2x500+400).
The flush invert model will only be supplied in rectangular openings.