... steel, brone Etc4.Pressure :0.5Mpa -6.0Mpa. DN: 15mm-1200mm We specialize in producing marine valve and air vent ... , Our main products include globe valve , SDNR valve, check valve , Hose valve , gate valve . down storm valve , butterfly valve , quick-closing valve , air vent head and ... iron . Cast steel , bronze , brass and stainless steel , Pressure :0.5MPA-6.0MPA , DN:15-2000MMWe have exported to ...