Material
* Body : Ductile iron GGG50
* Wedge : Ductile iron GGG50+NBR/EPDM
* Bonnet : Ductile iron GGG50
* Stem : Stainless steel 2Cr13
* Stem nut : Brass
* Holding ring : Brass
* Seating nut : Brass
* Handwheel : Ductile iron GGG50
* 0 Ring , Gasket, Dust Ring : Rubber NBR/EPDM
standard:BSEN558-1.DIN3352,BS5163,AWWAC515,AS2638,ISO5208