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Monoflanges and VariAS-Blocks
General Features
Needle Valve with OS&Y Bolted Bonnet

OS&Y Bolted Bonnet
– Standard Packing


  • 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).
  • Stem with Cold Rolled Threads
  • Blow-out Proof Needle
  • Spring Washers for compensation of thermal expansion
  • Back Seat – Metal to metal secondary needle seal
  • Color Coded Dust Cap for operating thread protection
  • Needle Seal:
    Standard Packing in PTFE and Graphite or Carbon filled PTFE – TA-Luft Option
  • Bonnet Seal Ring: Graphite
  • Fire Safe approved acc. to ISO 10497 and API 607
    – Graphite Packing only
  • Max. allowable (Working) Pressure (PS): 420 bar (6,092 psi)
     – 689 bar (10,000 psi) optional
  • Anti-Tamper Valve Head Options available
  • All Non-wetted Parts in 316 Stainless Steel
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