紧密密封的Y形截止阀
Hermetically-sealed Y-Pattern Globe Valve

DN15 - DN50
ASME 1500，2500磅级
¹/₂ - 2" (15 - 50 mm)
ASME CLASSES 1500, 2500

正在使用中的2500磅级，
紧密密封Y形波纹管密封阀门照片。
In-service photo of Class 2500
hermetically-sealed
Y-pattern bellows seal valve.

结构特征
DESIGN FEATURES

• 不扭转的波纹管
  花键阀杆可防止波纹管旋转，确保较长的使用寿命。
  NO TORSION OF BELLOWS
  Splined stem prevents torsion of bellows and assures long cycle life.
• 胶长使用寿命波纹管（5000次）
  特制并且成功证明适用于高压高温环境。
  LONG CYCLE LIFE BELLOWS (5000 cycles)
  Designed for, and successfully tested in, high pressure-temperature conditions.
• 小扭矩，来源于：
  LOW TORQUE due to:
  1. 不旋转阀杆
     Non-rotating stem
  2. 阀杆螺母止推轴承
     Stem nut thrust bearings
  3. 中心黄油嘴适用于阀杆螺母润滑。
     Central grease fitting for lubrication of stem nut.
• 两个次级阀杆密封
  TWO SECONDARY STEM SEALS
1. 后座
   Backseat
2. 阀杆填料
   Stem packing.
• 消防（防火）阀门
  在耐火测试期间和以后仍然可以正常操作
  VALVES ARE FIRE SAFE
  Operate normally during and after fire test.
• 在线维修简便易行
  在具有螺纹（O形环密封）阀帽的阀门上，阀杆-波纹管总装容易拆卸和更换。在密封焊接阀门上，焊缝的拆卸和更换是必要的。特制的电动工具可以切割密封焊缝。
  EASY IN-LINE SERVICING
  Stem-bellows assembly can easily be removed and replaced on valves with threaded (O-ring seal) bonnet. On seal-welded valves, removal and replacement of weld is necessary. Special power operated tools are available for cutting the seal weld.