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Provided by OpenGlobal

Triple offset valve - Unaffected by Temperature Fluctuations


A Valve Unaffected by Temperature Fluctuations

An ideal solution for high temperature and cryogenic applications

Our fully metal seated, triple offset design combined with our expertise in material selection ensure that Series 30,000 tightness and operability are unaffected by severe fluctuations at high/cryogenic temperatures, providing the ultimate solution to long-term isolation, flow control and emergency operations. This also means that during actuator selection, no extra-safety factors need to be taken into account as the valve will maintain a constant torque demand across a wide range of temperatures.

Vanessa Series 30,000 cryogenic valves: a trim that delivers top-level shut-off performance

Vanessa Series 30,000 cryogenic valves feature our standard body seat (with weld overlay of Stellite® grade 21) and forged one-piece metal seal rings exclusively. This creates the perfect combination of robust and flexible materials resulting in reliable, long term shut-off performance. Whether in double flanged, lug, buttweld or buttweld top entry body styles, it is our trim that truly delivers the results customers expect.
Stellite® 21 is a cobalt alloy that coats the body seat to provide hardness, resistance to fluid abrasion and wear, while ensuring high corrosion resistance. It will last for the entire valve/plant life for gaseous as well as liquid natural gas. High tech welding robots and Vanessa IWE (International Welding Engineer) qualified personnel ensure quality and maximum reliability of these overlays.
Using polymers or other soft components for valve sealing significantly limits its ability to achieve consistent tightness over time. For cryogenic applications, Emerson Vanessa’s seal rings are made in UNS S20910 (or Nitronic®50), an austenitic stainless steel, which is highly resistant to corrosion while keeping important mechanical features at low temperatures. It also has exceptional yield strength, approximately double that of other series 300 stainless steels at ambient temperature.