Nasim12345
Industrial
- Apr 25, 2017
- 53
Dears
Can you pls share me the common reasons for the Bellows failure in PSVs other than listed below.
1. If the PZV has been exposed to excessive backpressure(constant/variable) then the bellows will damage.
2. If the PZV starts to chatter (rapidly opening and closing), as well as flow instability, could inevitably cause valve damage such as premature fatigue failure of the bellows.
3. If the operating pressure is too close to the set pressure, then pzv spindle is moving (maybe just simmering rather than popping open), causing enough movement to fatigue the bellows.
4. If there is any corrosion, bellows may damaged.
Thanks
Nasim
Can you pls share me the common reasons for the Bellows failure in PSVs other than listed below.
1. If the PZV has been exposed to excessive backpressure(constant/variable) then the bellows will damage.
2. If the PZV starts to chatter (rapidly opening and closing), as well as flow instability, could inevitably cause valve damage such as premature fatigue failure of the bellows.
3. If the operating pressure is too close to the set pressure, then pzv spindle is moving (maybe just simmering rather than popping open), causing enough movement to fatigue the bellows.
4. If there is any corrosion, bellows may damaged.
Thanks
Nasim