ABB PPD512A10-150000

Description

ABB PPD512A10-150000

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Change the sleeve of the window to a sleeve with small holes, etc. If a DN25 double seat valve in a nitrogen fertilizer plant frequently vibrates and breaks at the connection between the valve stem and the valve core, PPD512A10-150000 was confirmed to be in resonance. After that, the linear characteristic valve core was changed to a logarithmic valve core, and the problem was solved. For example, in a laboratory of a certain aviation college, a DN200 sleeve valve was used, but the valve plug produced strong rotation and could not be put into use. After changing the sleeve with an open window to a sleeve with a small hole, the rotation immediately disappeared.

The natural frequency of PPD512A10-150000 varies with different structural forms of regulating valves, and replacing the type of regulating valve is the most effective way to fundamentally eliminate resonance. A valve that resonates strongly during use – it vibrates strongly (in severe cases, the valve can be damaged), rotates strongly (even the valve stem can be broken or twisted), and produces strong noise (up to over 100 decibels). As long as it is replaced with a valve with a significantly different structure, the resonance will immediately take effect and miraculously disappear. If a new expansion project of a certain vinylon factory uses a DN200 sleeve valve, all three phenomena mentioned above exist, The DN300 pipeline jumps, the valve plug rotates, the noise is over 100 decibels, and the resonance opening is 20-70%. Considering the large resonance opening, a double seat valve was used instead, and the resonance disappeared and the operation was normal.

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