WTA® Hydrofluoric Alkylation Valves Type HF11.35

WTA® Bellows Sealed Globe Valves provide the highest fugitive emission protection for Hydrofluoric Acid (HF) applications including Alkylation.

Features And Benefits

  • Protected bellows to prevent erosion and pressure shocks, designed for 10,000 cycles
  • Full size safety gland packing made of pure graphite
  • Metal back seat and stroke limiter
  • Stem with internal roll-formed stem thread and rising hand wheel
  • Stainless steel cam profiled bonnet gasket coated with pure graphite, mounted in tongue and groove bonnet flanges

Technical Details


  • Body made of Hastelloy® C (HF-1), ASTM A 216 WCB-S16 (HF-2)
  • Body seat hard-faced with Stellite® 21
  • Disc in Hastelloy® C276 hard-faced with Stellite® 6 or Hastelloy® C
  • Bellows and trim in Hastelloy® C276, Monel®
  • Other materials are available upon request


  • NPS ½” – 16″
  • Other sizes are available upon request


  • ASME class 300, 600


  • T-type body design
  • Globe valve face to face standard
  • Gate/Plug valve face to face standard
  • Body/bonnet wall thickness exceeds API 602 for additional corrosion resistance


Toxic, aggressive, and corrosive characteristics including HF Alkylation and other HF applications.


  • In accordance with UOP and ConocoPhillips requirements (HF-1 and HF-2) including Shell and Helium leak test
  • API 598 requirements by testing every valve to zero leakage
  • Flange design in accordance with ASME B 16.5 and EN 1092-1
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