Valve knowledge: pneumatic control valve working principle detailed Siemens system electric control valve installation and precautions
Pneumatic regulating valve is also known as pressure regulating valve, which is the automatic control theory to choose dynamic operation to change the total flow device. Pneumatic control valve by the actuator and the valve body component of the actuator to promote the role, and the valve body component to adjust the effect of the valve. Pneumatic control valve is a kind of actuator tension. The actuator is a dashboard that changes control variables immediately and is a terminal device component. In addition to the control valve, the actuator also includes pneumatic pump, handling manipulator, relay, electric speed regulating pump and other commodities.
Pneumatic regulating valve is also known as pressure regulating valve, which is the automatic control theory to choose dynamic operation to change the total flow device. Pneumatic control valve by the actuator and the valve body component of the actuator to promote the role, and the valve body component to adjust the effect of the valve. Pneumatic control valve is a kind of actuator tension. The actuator is a dashboard that changes control variables immediately and is a terminal device component. In addition to the control valve, the actuator also includes pneumatic pump, handling manipulator, relay, electric speed regulating pump and other commodities.
The actuator is to manipulate the flag light into the corresponding position to adjust the valve parts or other driving mechanism situation device. Flag lights or propulsion may be pneumatic, electric, hydraulically operated valves or any combination of the three. Valve body component is a part of the adjustment of pneumatic control valve, anxiety by the valve shell, seat, valve core, high pressure gate valve, screw cap and hydraulic seals. They contact with the medium, driven by the actuator, change the total area of commodity circulation between the valve core and the high pressure gate valve, in order to achieve the effect of regulating the valve.
Pneumatic regulating valve adopts multi-torsion spring pneumatic plastic film actuator, single seat regulating valve body selection of cross section S-shaped flow channel design scheme, valve core selection of top oriented structure, with small size, light weight, strong flow capacity, small leakage benefits; Sleeve specifications, double sitting control valve adopts pressure control structure, which has the advantages of allowing low pressure, stable operation and low noise.
According to the allowable pressure difference condition, medium characteristics and process pipeline regulations, single seat, double seat, sleeve specifications, Angle, diaphragm, three-way regulating valves can be selected;
According to the process standard, the flow coefficient can be selected parallel line, equal percentage, fast opening;
Can be chosen according to the working pressure, nominal diameter for PN1.6 MPa, PN4.0 MPa, PN6.4 MPa regulating valve;
According to the medium corrosion resistance requirements and design pressure, can choose pig iron, cast steel, cast stainless steel plate, cast carbon steel, calcined steel regulator of different materials;
According to the medium environment temperature and its special provisions, can choose the basic type, continuous high temperature heat removal type, ultra-low temperature type, collet heat insulation type control valve;
According to the media leakage and its safety factors, you can choose hard seal gate valve, soft seal, bellows seal and other regulating valves; Our hard seal gate valve regulator leakage level is higher than IV level; Soft seal regulating valve can ensure no leakage;
According to the pneumatic valve and its control system condition can choose the flag light range including 20 ~ 100Kpa, 40 ~ 200Kpa, 4 ~ 20mA.DC, 0 ~ 10mA.DC;
According to the regulations of process operation, it can be equipped with the following accessories: main shaft organization, valve positioner, gas filter pressure reducer, electric-gas converter, valve position transmitter, relay, position keeping valve, etc.
Installation for every industrial production instrument and equipment is more serious, not to mention the very high sensitivity of the pneumatic regulating valve principle? Should the installation be carried out in detail to these article title marketing planning, in order to ensure proper installation? Why do you pay attention to the installation method of pneumatic regulating valve principle, anxiety is because there is no correct installation, it is difficult to ensure that in the next use can be smooth, there are many common faults, and then affect the use of pneumatic regulating valve period.
Containing corresponding connecting pipes:
In the installation of pneumatic control valve must have the pipeline, and the length of the nozzle should exceed the diameter of ten times, in order to ensure that the liquid through the pneumatic control valve will not be due to the pipeline section and harm the total flow of the article title.
Use eccentric reducing pipe connection:
The application of this method is connected with anxiety because the specifications of the regulator are different, it should be too fine when carrying out the installation of this article title, after all, the liquid indicating arrow in the valve body may be consistent with the liquid operation position, in order to ensure the use of pneumatic regulating valve principle will not occur when the article title.
To set the bypass pipe:
In the installation of pneumatic control valve, in order to be able to simple practical operation, it is necessary to use manual control method, and must be prepared for the conversion in advance, so as to ensure that in the case of the machine, the pneumatic control valve principle to test the construction of the website cost, if you meet the article title is also convenient for its maintenance.
In the daily production link, the maintenance of pneumatic control valve is limited to the valve troubleshooting, very little to carry out on time calibration and timely detection, in the company’s metrological verification and regulation technical specifications for this matter are not strict management, in fact, the common valve fault from a number of elements of accumulation, accumulation to a certain extent will form a common fault, so, Before the common failure of the valve, this element is removed in the bud, not to extend the service life of the valve, but also to avoid the harm caused by the common failure of the valve.
Siemens system electric regulating valve installation method and precautions Siemens system electric regulating valve before installation to clean the pipeline, remove dirt and welding scar. After installation, in order to ensure that the residue is not attached to the valve body, it should also be cleaned to the gate valve again, that is, to make all the gate valve open when entering the medium, to prevent the residue stuck. After using the spindle organization, the original neutral position should be restored to normal. Siemens system control valve belongs to the field instrument, the working temperature should be in the range of -25 ~ 60℃, air humidity ≤95%. If the regulator is installed in the outdoor or continuous high temperature places, moisture-proof, temperature reduction countermeasures should be taken. In the earthquake source area to avoid the world peak and increase the anti-earthquake measures.
Siemens Systems Electric control valve before installation to solve the pipe clean, remove dirt and weld scars. After installation, in order to ensure that the residue is not attached to the valve body, it should also be cleaned to the gate valve again, that is, to make all the gate valve open when entering the medium, to prevent the residue stuck. After using the spindle organization, the original neutral position should be restored to normal.
Generally, it should be installed vertically, and when necessary, it can be tilted, such as the inclination is very large or the valve itself is very large in the process of lifting the valve support parts maintenance.
Installation of regulating valve pipeline generally do not have to be too high from the ground or wood floor, in the relative height of the equipment more than 2m should be set as far as possible service platform, which is conducive to the operator wheel and conducive to maintenance.
In order to allow the regulator in the case of failure or maintenance so that the processing process can proceed smoothly, the regulator needs to add bypass pipeline. In addition, attention should be paid to whether the installation of the regulating valve meets the needs of the technological process.
The installation of part of the electrical equipment of the temperature regulating valve of Siemens system shall be carried out according to the construction standards of the relevant electrical equipment. If it is explosion-proof commodity, it should be installed according to the standard of Installation of Electrical Equipment in Risk Site.
Siemens system control valve belongs to the field instrument, the working temperature should be in the range of -25 ~ 60℃, air humidity ≤95%. If the regulator is installed in the outdoor or continuous high temperature places, moisture-proof, temperature reduction countermeasures should be taken. In the earthquake source area to avoid the world peak and increase the anti-earthquake measures.
Post time: Apr-25-2023
