Pressure gauges play an important role in the use of hydraulic systems. The correct selection of pressure gauges mainly includes determining the type, range, range, accuracy and sensitivity of the meter, the size and whether it needs to be transmitted remotely and has other functions, such as instructions. Record, adjust, alarm, etc.
Dalan Hydraulics tells you the main basis for the selection of pressure gauges:
1. The measurement requirements of the process production process, including range and accuracy.
1 In the case of static test (or slow change), the maximum value of the measured pressure is specified to be two-thirds of the full scale value of the pressure gauge;
2 In the case of pulsating (fluctuating) pressure, the maximum value of the measured pressure is selected to be one-half of the full scale value of the pressure gauge.
2. The accuracy level of commonly used pressure detecting instruments is 0.05, 0.1, 0.25, 0.4, 1.0, 1.5 and 2.5. It should be selected from the requirements of production process accuracy and the most economical.
3. The maximum allowable error of the meter is the product of the range of the pressure gauge and the percentage of the accuracy grade. If the error value exceeds the accuracy of the process requirements, the pressure gauge with a higher accuracy level needs to be replaced.
4. The properties of the measured medium, such as state (gas, liquid), temperature, viscosity, corrosivity, degree of fouling, flammability and explosiveness. Such as oxygen meter, acetylene meter, with "oil-free" mark, corrosion-resistant pressure gauges for special media, high temperature pressure gauges, diaphragm pressure gauges, etc.
5. Environmental conditions at the site, such as ambient temperature, corrosion, vibration, humidity, etc. Such as shockproof pressure gauges for vibrating environmental conditions.
6. Observation of the staff. According to the position and lighting conditions of the measuring instrument, the meter with different diameter (outer size) is selected.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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