Body, disc, retainer ring and gear box:
Ductile iron EN-GJS-500-7/EN 1563 (former to DIN GGG50)
Shaft:
Stainless steel 1.4021/EN ISO 10088 (equivalent to UNI X20Cr13 or AISI420)
Sealing seat:
Austenitic nickel-chromium stainless steel (equivalent quality to AISI304)
O-Ring bush:
Brass CuZn40Pb2
Anti friction bushes:
Multilayer steel honeycomb and lubricating graphite
O-Rings and disc seal:
Rubber, potable water approved
