Screwed Bonnet

Type 1 O-Ring Stem Seal + Graphite Packing
Type 3 reinforced PTFE Packing
Type 4 Graphite Packing
Type 5 carbon filled PTFE 

Features


• Integral Valve Seat – Metal to Metal Seated
• Non-rotating Needle
• External Stem Thread – Packing below stem threads. Stem Threads are protected from process media (non-wetted), helps to prevent stems from galling.
• Stem with cold rolled threads
• Back Seat – Metal to metal secondary needle seal
• Color Coded Dust Cap for operating thread protection
• Max. allowable (Working) Pressure (PS) 420 bar (6,092 psi)
• Anti-Tamper Valve Head Options available
• FKM O-Ring Needle Seal – RGD (Rapid Gas Decompression) resistant
• PTFE or Graphite Packing
• All non-wetted parts in 316 stainless steel
• Types also comply with the requirements of TA-Luft 2021