As we all know, vibration, pulsation, and pressure peaks are the most common reasons for pressure gauge performance degradation and failure. In today’s more demanding environment, instruments in the oil, natural gas, and chemical industries and processing plants must work under such harsh conditions every day.

Pumps, compressors, and other rotating and moving equipment are often subject to strong vibrations, which not only wear down the instrument but may also cause errors. Vibration makes it difficult to read the pressure gauge and may cause the pointer to deviate from zero. Using liquid-filled pressure gauges instead of dry pressure gauges can minimize these problems.

Glycerin: Glycerin is one of the commonly used liquids in liquid-filled gauges. Glycerin-filled gauges are a good value and provide good vibration dampening for applications at room temperature. These gauges work well in temperatures between -4°F and +140°F (-20°C and +60°C).

Silicone: Silicone and other comparable oils have lower viscosities even at very low temperatures; therefore, silicone-filled gauges are better for applications with extreme temperature variations, especially in colder climates and when icing may be expected. Their working temperature range extends from -40°F to +140°F (-40°C to +60°C).

To sum up, both glycerine and silicone pressure gauges have strong stability and seismic resistance. But silicone-filled pressure gauges work better in extreme conditions.

Choosing the right fluid for the filling pressure gauge is essential to ensure good performance and long life. Your decision should be based on the temperature range and medium in which the pressure gauge will work. For example, too high a temperature may cause the liquid to decompose, and too low a temperature may cause the liquid to solidify. In both cases, it will affect the performance of the liquid and thus the performance of the instrument.

Liquid-filled pressure gauge can effectively suppress vibration, pulsation, and pressure peaks. Silicone oil and glycerin can also be used as lubricants and protect the precision parts of the instrument. The oil-filled pressure gauge is sealed. They prevent the ingress of dust and moisture, prevent condensation and reduce visibility problems in high humidity conditions. Sealing also makes them an excellent choice for applications in corrosive environments. In the long run, liquid-filled pressure gauges have fewer problems and less downtime and are a more cost-effective solution.