功能

• An in-line connection between the sealed container (chamber) and the vacuum pump controls the pressure in the container to a constant value.
• It can be d in two ways (switching): electromagnetic valve control when using a pump suitable for continuous operation, such as an oil rotary pump, and power control when using a dry pump with no oil back concerns.
• In the case of power control, once the set value is reached, the pump power is turned off, thus saving power.
• Convenient for long duration pressure control.