The existing type and main application of pneumatic valve adjustment

with the gradual improvement of the enterprise automation, collecting and distributing control of DCS and PLC control has been more and more widely used in the field of automation, through the computer optimization control, has achieved good results. As one of the key instrument automation control facilities regulating pneumatic valve was generally applied in petrochemical enterprises, and other auxiliary instrument, it can realize the production process flow, liquid level, pressure, temperature and other process parameters and other media, such as liquid, gas, steam, etc. Automatic adjustment and remote control. In chemical production, adjust the characteristics of pneumatic valve because of its installation, and the process pipeline in high temperature and high pressure, strong corrosion, high viscosity, easy to coking crystallization, poisonous and harmful material in direct contact, easy to corrode, aging and damage. Adjust the stand or fall of pneumatic valve control directly affect the production run, improper maintenance or troubleshooting in time will not affect the normal regulation of the entire process control circuit, to continuous production process control. In continuously optimize production process at the same time, also make the control system of main fault is focused on the terminal actuators that adjustments of the adjustment system on the pneumatic valve. For chemical production process control of complex features, and each link alternating fault trace, a direct impact to the next production, therefore, guarantee the stability of regulating pneumatic valve in the chemical production unit operation is crucial, and the operation of the process operation control and maintenance personnel to contact is very close.
adjust the selection and calculation is the premise of pneumatic valve, installation and commissioning maintenance is the key, finally are used in production. A typical process control such as flow control, pressure control, liquid level control, temperature control, sets of finished products are high precision parts. Mainly by the actuators and pneumatic valve body parts. Pneumatic actuator output force and the body after accepting force, regulate the flow of pneumatic valve body through the attachment for the intelligent positioner system. According to the different actuator drive, can be divided into pneumatic regulating pneumatic valve, electric pneumatic valve and hydraulic pneumatic valve adjustment. At present, the adjustment of the chemical found company use pneumatic valve for pneumatic valve, pneumatic control with pneumatic V regulating pneumatic ball valve, pneumatic type O cut pneumatic ball valves, pneumatic piston straight stroke regulating pneumatic valve, electromagnetic diaphragm pneumatic valve, pneumatic valve, pneumatic straight travel diaphragm with pneumatic valve positioner, proportional control can be realized. According to the particularity of its structure and application characteristics, suitable for all kinds of adjustment occasions, such as adjusting the pneumatic valve is used to control the polymerization temperature of cold water, used in chlorine hydrogen pressure control of blow-down regulating pneumatic valve, is used to control the stripper liquid level of the liquid level regulating pneumatic valve and flow of the centrifuge is used to control the cutting blanking regulating pneumatic valve, etc. （ According to tests, pneumatic valve)