- Body and bonnet: Austenitic stainless steel castings or forgings are adopted, with high strength and cryogenic resistance.

- Stem: Stem surface is treated to reduce wear which is of abrasion resistant and scratch resistant at cryogenic.

- Sealing: Stellite is adopted which has the characteristics of wear resistance, corrosion resistance and cryogenic resistance.

- Extended stem:To ensure the sealing reliability of stem packing.

- Drainboard: It can effectively prevent condensed water from entering the insulation layer.