VIR butterfly valves ref.4000 WAFER type with ductile iron body and epoxy coating are suitable to most of HEVAC and Industrial systems.
The inner disc is ductile iron made or stainless steel made with EPDM or VITON seats and O-rings upon request.
The stem is always stainless steel made.
The ISO5211 plate suitable to electric or pneumatic actuators.

Ductile iron disc