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  • Mirab Co.

Eccentric Wafer Type Butterfly Valves

Size (mm) : 200-1200
Pressure rating : 6-25 (bar)
Body Material: All Types of Ductile Cast Iron, Cast Steel, Stainless Steel, Copper Alloys
Disc Material: All Types of Ductile Cast Iron, Cast Steel, Stainless Steel, Copper Alloys

Application :
Usable in oil rig industry, offshore, onshore& marine industry, gas station, etc. This type of wafer type butterfly valves is applicable as isolating & regulating valves with sea water media & gas in corrosion base atmosphere.

a) Ni-Al-Bz (ASTM B148) alloy is one of the best choices against corrosive sea water media. Some categories of stainless-steel materials are available too as per request.
Advantages:
Average corrosive rate: 2 mpy to 5 mpy.
Cupper corrosion resistance ability & protective surface of Al2O3.
Corrosion resistance against mineral & organic acid bases.

b) Application of Ni-Cu (ASTM E 76) alloy
Parts in these valves which are in direct contact with seawater such as shafts, stems, screws & nuts should have suitable resistance against other imposed forces in addition to their resistance against corrosion. Ni-Cu alloy (MONEL) is the best choice for this application. Stainless steel alloy can be used upon request.
Advantages:
Very adopted & useful material to produce valves, pumps & ship propeller.
Protective surface & good mechanical properties against corrosion & erosion.