Why is a circle bent between the pressure gauge and the pipe connection?

When the pressure gauge is connected to the pipe, a bend should be added between the pressure gauge and the pipe connection. Why is that? What does this do? Let's take a look!

This connection between the pressure gauge and the pipe is the pressure gauge bend, the official name is called the buffer pipe. The fittings used to connect the pressure gauge and the measuring equipment or pipe of the pressure gauge are used to buffer the instantaneous impact of the measured medium on the pressure gauge spring tube, which can well protect the mechanical structure of the digital display meter or the pressure sensor from damage and extend the service life.

The scientific name of this bend is called condensation pipe or siphon. There are two forms of pressure gauge bending: one is circular bending, and the other is U-shaped bending.

 The purpose of the pressure gauge bend is to protect the internal transmission mechanism of the meter from the damage of the medium temperature and the corrosiveness of the medium. Usually, if the medium has a certain corrosiveness, a pressure gauge bend must be added. When the temperature of the medium is greater than 60 ° C, a pressure gauge bend must be added. If the pressure gauge is installed on a clean drinking water system, there is no need to add it. 

It also has the effect of reducing vibration and impact, and also plays a certain heat dissipation role in the medium with higher temperature, in order to protect the pressure gauge and reduce the temperature impact error of the pressure gauge. The damping screws at the orifice of some pressure gauge joints play a throttling buffer effect by reducing the flow area, which is mainly useful for the medium pressure pulse.