What role does the fluorine-lined regulating valve play in the regulating system
It can be seen that the lining fluorine regulating valve has an executive element in the system, which acts on the regulated object. According to the control signal value, the actuator changes the input of the automated process. In fact, the signal xm is the regulating factor, in most cases it is the flow (air, steam, water, petrochemicals, etc.). The most commonly used actuator to regulate the flow is the regulating valve.
Secondly, it can be seen that the automation instrument includes a transmitter, a regulator and an actuator. It is connected to the regulated object at two places, that is, it is connected to the actuator at the inlet and connected to the transmitter at the outlet. In automation system design, these two connections complicate the design. The transmitter simply selects from the sample. The choice of regulating valve must be a lot of calculation, but also consider various factors, such as drive mode, structure, process, economy, etc.
pneumatic regulating valve consists of two parts: the actuator and the regulating mechanism (valve). The input of the regulating valve is the signal x from the regulator, generally taking 0.02-0.1MPa pneumatic signal or electric signal, and the output is the flow of the process. Under the action of the pneumatic signal Xc, the valve stem of the actuator moves H (mm), which is also the input of the valve. Stem stroke 1 causes the disc to be in a different position.
causes the medium flow area through the valve to change, resulting in a different flow rate Qv, thus obtaining the relationship between the flow rate through the valve and the input signal Xc. Therefore, in the field of industrial automation process control, the regulating valve is the final control element that changes the process parameters such as medium flow, pressure, temperature, and liquid level by receiving the control signal output by the control unit and using power operation.
The fluorine-lined valve not only bears the internal pressure of the fluid, but also bears the stress of the pipeline, the gravity of the sphere and other additional forces. The design must consider tightness and strength. corrosion, manufacturing process and other factors.
Fluorine-lined valves are made of ptfe-lined butterfly plates with spherical sealing surface layers, and silicone gaskets at the base of high-pressure gate valves are used to adjust the sealing performance of valves. The pneumatic valve has light weight, tight sealing performance and long service life. It can be used for quick disconnection or flow adjustment. Applicable to the provisions of reliable sealing and excellent adjustment characteristics of the place.
Fluorine-lined valve has the dual function of switching and flow regulation, which can easily open and close the gas path without affecting the flow and ensuring the repeatability of the flow. The slow start reduces the impact of the instantaneous pipeline pressure on the instrument.
On March 18, the equipment and thermal engineering joint party branch of Chongqing water pump factory co., ltd organized the 2018 annual organization life meeting. At the meeting, all the party members of the branch carefully looked for their own shortcomings, spoke actively, adopted mutual evaluation of party members, directly pointed out problems and showed signs, and did not engage in harmony with each other. The named party members all expressed their attitude and accepted criticism from others modestly.