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The Role of Gas Pressure Regulating Equipment in Our Life
To answer the above questions, we need to start with natural gas sources. Natural gas sources are divided into three categories: long-distance pipeline gas, LNG (liquefied natural gas) and CNG (compressed natural gas). The regional pressure of long-distance pipeline gas near the gas field can reach 35 kg, and the pressure of ordinary pipeline gas is 4 kg; LNG can reach 162 C below zero with 12-8 kg pressure; CNG is compressed natural gas with 20 kg pressure. The above three categories are extremely dangerous if they are directly used in factory combustion or household use. Gas pressure regulating equipment is needed because the pressure of factories or households is between 0.3 and 0.02 kg, and the pressure of all three kinds of gas sources is much higher than that of end users.
When choosing voltage regulator, commercial users and industrial users generally choose double-circuit regulator. The import pressure range of commercial users is 0.2 MPa~0.4 MPa, the outlet pressure of regulator is 12 000 Pa~16 500 Pa, the import pressure range of industrial users is 0.2 MPa~0.4 MPa, and the outlet pressure of regulator is 20-50 KPa. They usually choose to be placed close to the user, which can reduce the pressure loss caused by distance.
The above is how to choose the regulator according to the different flow rate and users, but no matter what kind of regulator is chosen, the gas regulator cabinet must be equipped with filters, safety release valves, emergency shut-off valves, indicator pressure gauges and other related accessories, so that the regulator has emergency shut-off protection during the process of pressure regulation. With the function of automatic discharge protection under overpressure, the pressure regulating accuracy of the regulator must be controlled in the range of 25%-30%. Its filter device should be equipped with a differential pressure gauge, and the filtering accuracy must be controlled in the range of 200 microns. In addition, commercial and commercial users install pressure regulators to compensate for flow errors caused by large pressure difference.
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