Why is the stem of the straight stroke regulating valve thinner?

Release time:

2024-05-10

Source:

It involves a simple mechanical principle: large sliding friction and small rolling friction. Straight travel valve stem up and down movement, packing a little tight, it will be the stem wrapped very tight, resulting in a larger return. For this reason, the valve stem is designed to be very small, and the filler is often used to have a small coefficient of friction to reduce the backwardness. However, the problem caused by this is that the valve stem is thin, which is easy to bend and the filler life is short. To solve this problem, the best way is to use the travel valve stem, that is, the angle of the type of control valve, its stem than the straight stroke stem 2~3 times thicker, and the use of long life of graphite packing, stem stiffness, packing long life.

In the pipeline system, the valve plays a vital role. When it is necessary to connect or cut off the medium in the pipeline, the cut-off valve can play its role. Through the lifting movement of the valve flap, the cut-off valve can realize the complete opening or closing of the medium, so as to realize the precise control of the medium circulation in the pipeline. However, it is worth noting that the shut-off valve is not suitable for use as a throttle device. Although the lifting movement of the valve can adjust the flow of the medium to a certain extent, this method is not accurate and is easy to cause damage to the valve itself.

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