Is it necessary to install a pressure gauge at the pump outlet?
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Installing a pressure gauge at the pump outlet can indeed help monitor the pump’s operating condition, which is advantageous. However, the issue is that it is mandatory to install such a gauge; otherwise, it constitutes a violation and could result in penalties from the safety supervision authorities The reason for asking this question is that in practice, there are cases where it isn’t installed, yet it still runs smoothly ； In other cases, the materials tend to clog the pipes easily, making it troublesome to install pressure gauges. By the way, must a shut-off valve be installed on the pressure gauge beforehand? Why is a thermometer not needed?
How can one determine whether a pump is operating properly without a pressure gauge? The shut-off valve located before the pressure gauge serves to facilitate maintenance in case of pressure-related issues; thermometers are usually of the insert type, and it’s not possible to install valves on them
It’s not necessary to install it; not installing it doesn’t violate any regulations. If you’re concerned about blockages, you can use a diaphragm type. It’s advisable to install a shut-off valve for maintenance or other operations, but it’s not mandatory either； A thermometric type heat transfer resistor – what valve should be used?
The methods of temperature and pressure measurement differ: thermometers use a probe that is inserted in order to make contact with the surface being measured, while pressure gauges rely on the pressure transmitted by liquids. Thermometers cannot be equipped with valves, and many of them come with protective casings that do not prevent disassembly. Pressure gauges, on the other hand, need to be removed if they are to be replaced or inspected annually; valves are necessary for this purpose. Standards also require that pressure gauges at the pump outlet be designed to include shut-off valves. Pressure gauges are primarily used to monitor operational conditions, and they are needed both during startup, shutdown, and normal operation. In cases of blockages, it may be advisable to use pressure gauges equipped with diaphragms
Most of the pump outlets of mine don’t have pressure gauges installed; the safety inspection team has been checking for several years and has never raised this issue
Generally, it is best to have a pressure gauge available, as this allows for on-site monitoring of the pipeline pressure and helps determine the operating condition of the pump. However, there are some materials whose properties make it impossible to install pressure gauges; for example, with low-temperature crystalline materials, the connection pipes of the pressure gauge can easily get clogged due to crystallization. Whether to install a pressure gauge depends on the circumstances; if it’s possible to do so, it’s definitely better to install it
The pump outlet pressure gauge is an indicator of the pump’s normal operation; any abnormalities in the pump’s performance can be detected promptly through changes in the pump outlet pressure. Some pump inlets even come equipped with pressure difference gauges! ! As for why thermostats don’t have valves, the fact that you ask this question shows that you’ve never seen thermostats in chemical plants in person; you’re either a beginner or a designer with little practical experience.
In general, it’s necessary to install it; otherwise, it’s impossible to see how the pump operates
The outlets of pressure pipelines and pressure pumps must be equipped with pressure displays; otherwise, it is impossible to determine whether the pressure is within the allowable range
As for installing pressure gauges below a certain level, my understanding is that wherever there is pressure present, in principle, a pressure gauge should be installed there!
It’s not necessary to install it; not installing it doesn’t violate any regulations. If you’re concerned about blockages, you can use a diaphragm type. The shut-off valve is used for maintenance or other operations. It’s very troublesome if you don’t install it, but it doesn’t cost much if you do.