... Rings are Epoxy Coated,which is certified for portable water.Working Pressure:1.6MpaTesting pressure:2.4MpaWoring Temperature:0°C to ... 1753"100Ductile Iron,PVCu,Cast Iron,Steel,Cast Iron Met&Imp AC109.6-127.8M12*1754"150Ductile Iron,PVCu,Cast Iron,Steel,Cast Iron Met& ... 2008"250Ductile Iron,PVCu,Cast Iron,Steel,Cast Iron Met&Imp AC272.0-289.0M12*21510"300Ductile Iron,PVCu,Cast Iron,Steel,Cast Iron Met& ...