On demand the valves could manufactured in others types of materials.
The valve FIG.54 is the same valve FIG.56 except the flange. This valve is especially designed for bores with vertical pumps.

PN: 10
DN: 80-200
STRAINER ⁽¹⁾: Steel / Polypropilene
SEALING VALVE: Cast iron. EN-GJL-250
SPINDLE: Stainless steel X20Cr13. AISI 420
BODY: Cast iron. EN-GJL-250
SPRING: Stainless steel X2CrNi18-9. AISI 304
SEALING JOINT: Rubber
SEALING RING: Cast iron. EN-GJL-250
HEAL SEAL / RING: Rubber
SCREWS: Stainless steel 6.8 Zn. EN-24017

(1) Size 80 and Size 200 in Steel plate construction. Size 100-125-150 in Polypropylene construction.