Pressure gauge: how to choose and install

Pressure gauge: how to choose and install After temperature, pressure is an important factor determining the operation and safety of industrial machinery systems, so continuous pressure control is essential. If the pressure gauge is selected incorrectly, it could cause permanent damage to the entire system or, more importantly, danger to life. => You can also choose the Portable Pressure Gauge for low pressure measurement (mbar -> 400bar) and infrequent measurement So you need to pay special attention to the following factors when choosing a pressure gauge: 1. Pressure scale It is advisable to determine what is the maximum pressure of the device when operating in order to select pressure gauges with suitable scale. It is common practice to choose the gauge of the gauge of the gauge to be larger than the maximum value during operation because too low a scale can lead to a decrease in the resilience of the bourdon tube due to high operating stress. Too high a scale can reduce the accuracy of the measurement results. * Common pressure unit is bar, but you can also choose other unit like psi or both units at the same time on 1 meter for convenient monitoring of pressure for many people. 2. Working environment (Fluid) The materials for the sensor components (most commonly bourdon tube) must be compatible with the working fluid. – The fluid can be compressed air, water, oil, acid, base … If it is compressed air or mineral water, we can freely choose pressure gauges of any material. For example, bourdon tube type pressure gauge, bourdon tube can be made from copper or stainless steel (these two materials are most common today) * However, if it is an acid solution, or any other corrosive solution, you need to know how to choose the right material for each fluid, to avoid pressure gauge corroding immediately after installation. put, endanger the operator. Diaphragm pressure gauges should be chosen in the following cases: the working substance temperature is too high compared to the standard gauges; substances containing heavy particles (sludge), substances with high viscosity or tendency to crystallize, polymerize at ambient temperature; heterogeneous substances; Hazardous Environments. The diaphragm should be selected according to the scale of the meter. If the diaphragm is too stiff, the measurement results may be erroneous. With a high pressure scale, choose the diaphragm stiff enough to avoid diaphragm puncture. 3. Connection type – Thread connection 14, 17 or 21 mm (equivalent to NPT ¼ “, 1/2” or ¾ “), or DN25, DN50, DN100 … – Knowing the above information helps us to choose the right pressure gauge without needing to install an adapter. Besides the type of connector pins should also be considered because it affects the type of installation such as hanging on the wall or on a table, or plugging directly on the pipe. Common is the connecting pin for the vertical type and the rear leg type.

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