The calibrator is a high precision pressure reducing valve used primarily for pressure setting. There are currently two pressure gauge calibrators: the gas source pressures are 0.14 MPa and 0.35 MPa, respectively, and the output pressure ranges are 0-0.1 MPa and 0-0.25 MPa, respectively. The output pressure fluctuation is not more than 1% of the maximum output pressure, and is often used in applications where accurate supply pressure and signal pressure are required, such as pneumatic test equipment and pneumatic automatic devices.
It consists of three parts: 1 is the main closed part of the direct-acting pressure reducing valve; 2 is the constant pressure drop device, which is equivalent to a certain differential pressure reducing valve. The main function is to make the nozzle get stable gas source flow; 3 is the nozzle baffle device and the pressure regulating part, which plays the role of pressure regulation and pressure amplification, and uses the air pressure amplified by it to control the main valve part.
Since the calibrator has the functions of setting, comparing and amplifying, the voltage regulation accuracy is high. Because the calibrator uses the feedback action of the output pressure and the amplification of the nozzle baffle to control the main valve, it can react to small pressure changes, so that the output pressure can be adjusted in time, and the outlet pressure is kept basically stable, that is, the fixed value. The voltage regulation accuracy is high.