Our cryogenic configuration has been designed in order to operate with temperatures down to -254 °C (-425.2 °F). The following features differentiate Vanessa Cryogenic Series 30,000 from the basic configuration.
Vanessa seal ring is always a one-piece solid in Nitronic® 50 (Solid Seal Ring) - a material highly resistant to corrosion able to preserve important mechanical features at low temperatures. Nitronic® 50 also has exceptional yield strength, approximately double that of other series 300 stainless steels at ambient temperature.
An extended bonnet keeps packing protected from cryogenic service temperatures down to -254 °C (-425.2 °F), meeting the requirements of BS6364 for non-cold box applications and major end user specifications.
Cryogenic valves are available in Double flanged, lug, buttweld and buttweld top entry body styles:
Double flanged body
The most widely used pipe connection - it enables the best gasket load distribution and short bolting reduces the risk of stretching. The standardized flange design also ensures safe pipe jointing and ease of assembly/disassembly from the line. Vanessa provides ASME and EN flanges including designs to ASME VIII sect 2 div.1.
The ideal choice whenever flanged connections need to be reduced, this design provides significant initial cost savings. The buttweld body completely eliminates the possibility of fugitive emissions through flanged joints induced by the adjacent pipe stresses. As for all Vanessa valves, ongoing maintenance is not required.
A single flange design and more economical than Double flanged, as it requires less material. With threaded inserts on both sides, it is installed using two sets of bolts and no nuts. According to common industry practices, operators tend to avoid using this body style for diameters higher than NPS 36 due to operational difficulties in installing the valve.
Buttwed top entry body
When an inline maintenance capability is mandatory, this design allows for access without removing the valve body from the line. The entire valve trim can be removed from the body and individual valve parts can be accessed in total safety. This feature allows for any unpredictable and extraordinary valve repair, which would be impossible, impractical or unsafe with different valve designs. Overall, the maintenance of a Vanessa valve remains largely unnecessary throughout the product lifecycle.