- Body and bonnet: Austenitic stainless steel forgings used for bodies and bonnets offer excellent impact strength, minimal heat loss and protection against corrosion. For cast steel valves radiographed castings are used only from specially approved foundries.

- Stem: To reduce galling, stems are made from advanced Nitronic 50 (grade XM-19 A479) with high tensile even at extreme cryogenic, excellent low friction and galling-free movement at points of stem contact. Alternative 316L stems are used for less demanding applications.

- Wetted parts: All Austenitic stainless steel. On small 1/4-2" for-ged valves seats, wedges or discs are often Stellite 6.

- Yoke bushings: Bronze.

- Lubrication: Molykote 33 or Plex 2.

- Packing: PTFE or other plastic packing protected from freezing by a column of insulating gas. For fire safe operation a secondary packing is provided using graphite.

- Seating faces: Stellite 6 is used to prevent seizing and galling. When extremely tight shutoff is required, valves are supplied with PCTFE, PTFE or other soft inserts.

- Bolting: Strain-hardened Austenitic stainless steel.

- Welding: Inconel electrodes must be used.

- Cleaning: All cryogenic valves are thoroughly degreased, cleaned and sealed to prevent contamination.