Globe valve has simple structure, through the principle of the stem rotation and up and down, the valve opened or truncated, and to ensure that the valve seal and the sealing function. Since the special structure of movement principle, also contributed the valve sealing force extremely negative consequences.
Practice has proved that the valve seal will be poor due to the abrasion between the sealing. To solve these topics, we can improve the structure and material of the valve seal.
1.Place the seal area move to the valve, which can make the seal life long, but add one seal between valve cover and valve flap make the structure more complex, and cost is higher.
2.Change the sealing material. Surfacing good anti-abrasion performance carbide on the stem seal cone, this method has achieved good results, of course, the alloy cost is high slightly.