Water & DesalinationWater Storage & Treatment
Penstock (sluice gate) frame & door (reservoirs, WTP, pump stations)
BS 7775 / AWWA C561. Seating faces: stainless insert or white metal. Spindle: SS 316 or bronze. Rising or non-rising. GCC: often stainless-faced for desalinated water contact.
Specifications
Material
Ductile Iron GJS-500-7 (modern preferred); Grey Cast Iron GJL-250 (legacy)
Grades
GJS-500-7;GJL-250
Material Class
Ductile IronGray Iron
Applicable Standards
AWWA C561
Common Processes
Green sand (frames & doors); resin sand (large, complex units)
NDT & Inspection
Dimensional (seating face flatness critical); hydraulic leakage test; operating force test; VT
Typical Specs & Notes
BS 7775 / AWWA C561. Seating faces: stainless insert or white metal. Spindle: SS 316 or bronze. Rising or non-rising. GCC: often stainless-faced for desalinated water contact.