½¨ npt-f x ½¨ 900/2500# vent/isolate: yes bracket-holes: no equalize: no     type in x out thread type body stem packing A29G 1/2" 900/2500#x1/2" npt bsp Carbon steel AISI 304 AISI 316 AISI 316L Monel Hastelloy C HS SO PTFE glass filled PTFE grafoil