Attributes . 6-turn Valves: For Aluminum Frames: aluminum body, 316 SS spindle, Acetal orifice, Buna-N o-rings; For 316 SS Frames: 316 SS body, 316 SS spindle, PCTFE orifice, fluoroelastomer o-rings. 16-turn Valves: For Aluminum Frames: brass body, 316 SS spindle, PCTFE orifice, Buna-N o-rings; For 316 SS Frames: 316 SS body, 316 SS spindle, PCTFE orifice, fluoroelastomer o-rings. . Names