The pressure system consists of pressure transmitter, pressure control instrument, booster pump, manual valve, pneumatic valve, etc. Its main functions are: the pressure transmitter detects the pressure in the sealed container, converts the pressure value into a standard signal of 4-20 mA, and transmits it to the signal input end of the pressure control instrument.
The pressure control instrument is the control core of the pressure system. It accepts the pressure signal from the pressure transmitter and controls the output according to the received pressure signal.
The signal output by the pressure control instrument controls a set of pressurizing components, and the system pressurizes the interior of the airtight container through the pressurizing component.
The booster assembly is a more complex and critical component, consisting of a solenoid valve and a booster pump. Continuously inject water into the closed container through the booster pump, so that the water pressure inside the container continues to rise until it reaches the pressure setting value.
When the pressure reaches the set value, the booster pump stops working, the system enters a closed and constant pressure state, and starts timing. During the constant pressure process, the system can automatically compensate the pressure drop, so that the pressure can be kept constant in a more accurate range.
When the constant pressure timing of the system ends, the pressure control instrument sends a pressure relief signal to control the action of the pneumatic valve for pressure relief, so that the water in the airtight container leaks out, and the pressure in the container decreases accordingly.
