½¨ npt-f x ½¨ npt-f vent/isolate: yes bracket-holes: no equalize: yes     type in x out thread type body stem packing M5V 1/4"x1/4" 3/8"x3/8" 1/2"x1/2" npt bsp Carbon steel AISI 304 AISI 316 AISI 316L Monel Hastelloy C HS SO PTFE glass filled PTFE grafoil