多层波纹管设计适合处理高压流体（通常是金属壁的两层或三层）。与相同厚度的单层波纹管相比，两层波纹管可以将其压力额定值提高80％至100％。可替代地，如果使用厚度等于两层波纹管的额定压力的单层波纹管，则行程长度减小。因此，多层波纹管设计比单一波纹管具有明显的优势。显然，波纹管容易遭受金属疲劳，这种疲劳会导致焊接失败。波纹管的疲劳寿命还受到结构材料，制造技术，冲程长度和冲程频率的影响，此外还受到诸如流体温度和压力等常规参数的影响。
潜在故障和故障排除
故障Fault
可能的原因Possible reason
补救措施Remedy
无介质流动
No flow
阀门关闭Valve closed
开启阀门Open the valve
未拆下法兰防尘盖
Flange dust caps were not removed
取下法兰上的防尘盖
Remove dust caps on the flanges
介质流动不良
Poor flow
阀门开度不够
Valve is not open enough
全开阀门
Open the valve
阀前过滤器很脏Dirty filter
清洁或更换滤网
Clean or replace the screen
管道堵塞Clogged pipeline
检查管道Check the pipeline
控制困难
Control difficulties
阀杆转不动Dry stem
油嘴处加润滑油Grease the stem
压盖填料过紧
Gland packing tighten too much
稍微松开压盖螺母，注意保持填料函密封性
Slightly slacken gland nuts. Put attention to
keep stuffing box tightness
阀杆泄露
Stem leakage
波纹管破裂
Bellow damage
拧紧压盖直到不泄露，尽快更换阀门
Tighten the gland until tightness will be
reached. Replace the valve assoon as possible.
阀座泄露
Seat leakage
关阀操作不当
Shut off not correct
不借助工具手动关阀
Tighten the handwheels without any
auxiliary tools
阀座或阀瓣损坏
Seat or disc damage
更换阀门，联系供应商
Replace the valve and contact supplier or
manufacturer
压力差太大
Pressure difference too much
应更换为平衡阀瓣，或检查阀门的安装方向
Apply valve with balancing disc. Check if
the valve was assembled according to
arrow direction marked on the valve.
介质被固体颗粒污染
Medium polluted with solid particles
清洁阀门，在阀前安装过滤器滤
Clean the valve. Fit strainer before the
valve.
连接法兰损坏
Broken connecting flange
螺栓拧紧不均匀
Bolts tighten unevenly
更换新的阀门
Replace the valve with new one
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