wanfan

1.advanced lost foam casting 2.much experience in valve-making 3.quanlity control and CE certificcate components:1.body:cast iron or ductile iron 2.disc:ductile iron with NBR /EPDM/FPM 3.seat:brass/broze 4.stem:stainless steel 5.bonnet:ductile iron or cast iron 6.hand wheel:ductile iron or cast ironappilication:1.face to face is according toDIN 3302-F52.flange drilled is according to DIN2532/2533 ...