When the internal pressure of the gas ballast valve is lower than the external pressure, the gas ballast valve opens and the pressure of the compressed gas has reached the discharge pressure before the gas enters the pump chamber to make the partial condensable gas pressure in the pump chamber reach the saturated vapor pressure at the pump temperature , The condensable gas will be discharged; when the internal pressure of the gas ballast valve is higher than the external pressure, the gas ballast valve closes the gas ballast valve. The other function is to restore the ultimate pressure of the vacuum pump. Sometimes we use it to extract the general air, containing fewer condensable gases, the general gas ballast valve is closed, but as time goes by, the oil is gradually being contaminated with a small amount of condensable gas contained in the air , For the vacuum pump without gas-bearing mechanism, it can only replace the new oil, or pump the oil to evaporate the liquefied steam to restore the pump's original limit pressure, but for the vacuum pump with gas-operated valve , Just open 1 to 2 hours to restore the vacuum pump ultimate pressure. Search Keyword: More Valve Technical Articles
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