①Pressure up to 6000 psig(414 bar) for stainless steel
Pressure up to 3000 psig(207 bar) for brass
②Temperature for PTFE packing from -65oF to 450oF(-54oC to 232oC)
③Temperature for Grafoil packing from -65oF to 1200oF(-54oC to 649oC)
④Packing below stem thread isolates the thread lubricants from the media
⑤PTFE ring in the gland protects stem thread from outside contamination