SPECIAL FEATURES:

Butterfly check valve. On demand available with damper piston.

MATERIALS:

Body, disc, retainer ring:
Ductile iron EN-GJS-400-15/EN 1563 (former to DIN GGG40), internal and external epoxy coated

Shaft:
Stainless steel 1.4021/EN ISO 10088 (equivalent to UNI X20Cr13 or AISI420)

Sealing seat welded on body:
Austenitic nickel-chromium stainless steel (equivalent quality to AISI304)

O-Rings and disc sealing:
Rubber

Counterweight:
Cast iron EN-GJL-250/EN 1561 (former to DIN GG25)

All metal, rubber, and coatings used have been designed for contact with water for human consumption, pursuant to the terms of Italian Health Ministry decree n° 174, dated 6/4/2004.