Sulfur hexafluoride SF6 has good insulation and arc extinguishing properties, usually used in the electrical industry and electronic industry. With the rapid development of electric power industry and the improvement of technical equipment, gas demand has a rapid rising trend. As the country is vigorously developing the basic power industry, it also brings great market opportunities for sulfur hexafluoride manufacturers.

Sulfur hexafluoride gas contains more than the specified moisture. When its humidity changes, it may condense on the solid insulation surface to make the surface become damp. At this time, the surface discharge voltage of the equipment will decrease significantly. SF6 gas under the action of arc and corona decomposition generated low fluorine compound gas, if there is no water molecules this external condition is not generated SO2, HF and other harmful substances, so as to avoid the corrosion of equipment produced by them. Therefore, SF6 equipment in the filling of gas, must be strict measures to prevent water into.

(1) Before the work starts, first of all, the relative humidity of the ambient air around the site should be measured ≤ 80% (that is, the ratio of water vapor density in the air and saturated water vapor density at the same temperature), which is the specific number of limiting air water content. If the test is not qualified, measures should be taken or re - selected dry and sunny weather for filling.

(2) In order to make the SF6 leaking gas be discharged and replaced in time, the fan should be opened when the main tip is filled, and the SF6 content of the air should not exceed 1000ppm. The test should be carried out within a certain time after the start of the work, and the specific situation should be carried out in the middle of the test. When the SF6 gas content increases or exceeds the standard, the components should be inspected in detail immediately to find out the cause and eliminate it