Usually koso regulating valve, it is necessary to be equipped with a koso positioner. The koso positioner is the terminal of the control system.
Once it fails, it will directly affect the safe operation of the device and have a great impact on the production process. The koso intelligent positioner can improve the flow characteristics and performance of the control valve. It can improve the production control ability of the enterprise through digital information communication with the DCS or bus equipment, and provide a guarantee for the safe and stable production of the device. The most commonly used is koso intelligent valve positioner, let's introduce its function:
1: It is used for important adjustment systems that require high adjustment quality to improve the positioning accuracy and reliability of the adjustment valve.
2: When the pressure difference between the two ends of the valve is large (△p>1MP a), the output force of the actuator can be increased by increasing the air source pressure to overcome the unbalanced force generated by the fluid on the valve core and reduce the stroke error.
3. When the medium to be adjusted is high temperature, high pressure, low temperature, toxic, flammable and explosive, in order to prevent external leakage, the packing is often pressed very tightly, so the friction between the valve stem and the packing is large. The koso locator overcomes the time lag.
4: When the adjusted medium is a viscous fluid and can contain suspended solids, the koso positioner can overcome the resistance of the medium to the movement of the valve stem.
5: Use a large-diameter (Dg>100mm) regulating valve to increase the output thrust of the actuator.
6: When the distance between the regulator and the actuator is more than 60m, the koso positioner can overcome the transmission lag of the control model and improve the response speed of the valve.
7: Used to improve the flow characteristics of the regulating valve.
8: When one regulator controls two actuators to implement split-range control, two koso positioners can be used to accept low input signals and high input signals respectively, then one actuator acts at low range and the other at high altitude, which constitutes a split. program adjustment.
