Introduction to gas ballast pneumatic valve of water vapor compression principle 2)

in addition to the extraction of water vapor, it should be compression, the compression space until exhaust, until the temperature within the pump pneumatic valve is opened, if the assumption is ℃, the water temperature of saturated steam pressure, Pa, once compressed vapor pressure above, the process will start to condense into water, also from time to time to open the push on the exhaust pneumatic valve, pneumatic valve exhaust is the gateway to the atmosphere and exhaust pneumatic valve spring, that is, the pressure in pump chamber is compressed to over open vent pneumatic valve dam, water vapor compression stage has been compressed into water concentration, vacuum pump oil mixture.
in order to meet the provisions of the moist air, and not let oil pollution of water vapor. As a result, oil seal vacuum pump must be equipped with a gas ballast device. Its principle is to put a certain amount in the process of compression, increase the air pressure, air gases and water vapor partial pressure and points of subsection haven't reached saturation vapor pressure of vapor mixture of vacuum pump a mixture of temperature and pressure, the pressure of the mix exceeded the exhaust more exhaust pneumatic valve, pneumatic valve opening pressure of the liquid in the pump steam chamber from external pump out too late. This site keywords: pneumatic ball valve pneumatic ball valve pneumatic pneumatic valve pneumatic pneumatic valve