Speciality Valve is the leading Double Orifice Air Release Valve Manufacturer in India. Description: 1.Body Material- ductile iron, cast iron, WCB,WCC, WC6, LCB, LCC 2.Size- 1/2’’ to 8’’ 3.Pressure No- PN6 to PN25 4.Class- 150 to 300 5.Ends- Flanged