In particular chemical processes the fluids in the pipes are often toxic, radioactive and hazardous. Gate valve for steam  are used to prevent leakage of any toxic chemical to the atmosphere. Body material can be selected from all available materials,The bellow can be supplied in different materials like 316Ti, 321, C276 or Alloy 625.

• 1).Metal bellows seals the moving stem and increases durability of packed stem seal valves.
• 2).Bellows monitoring port (optional): A plug can be connected with the space above the bellows to monitor performance.
• 3).Two secondary stem seals: a) Backseat in open position; b) Graphite packing.
• 7).Not as the tradtional grease screw only for the stem thread,A grease nipple is designed on the valve bonnet,we may lubricate lubricate the stem,nut and bushing directly,through the grease nipple;
• 8).Ergonomically designed handwheel, longer service life, easy to operate, safer and more reliable;