Stem deformation of valve stem
The reasons are as follows:(1) expansion;(2) closed
So why would the stem fracture or deformation of a few points: normal temperature and pressure of the valve body cavity there is closed, that is closed in the valve, the fluid pressure in the cavity closed at the upstream and downstream sides between the sealing surface is far higher than the upstream pressure.
The main stem has better compression, good thermal insulation, and is not easy to corrosion and rust, it has the sealing function of both sides, more resistant to abrasion and its long service life.
