NPT Ball Valve Stainless 316 Ball valve stainless steel 316 full port 1000psi WOG. A two piece ball valve made from 316 stainless. Threads are FxF NPT. Working pressure is 1000 psi for WOG. The ball, cap, body and stem are made from 316. Other metal parts are 304 stainless. Seat is reinforced PTFE. Other seals are PTFE. Temp. rating -60 to 450° F. Blow out proof stem. With locking handle clip.