Analyzing the applicability of CKD solenoid valves for you

CKD solenoid valve receives industrial automation control signals. The N control system completes the regulation of pipeline media, including process parameters such as flow rate, pressure, temperature, etc.. Pneumatic control valves have the characteristics of simple control, fast response, and intrinsic safety, without the need for additional explosion-proof measures.

The accurate and normal operation of CKD solenoid valves is of great significance for the normal operation and safety of process equipment. Therefore, it is necessary to strengthen the maintenance of pneumatic control valves.

Key inspection areas for maintenance

Check the chamber wall: Under high pressure difference and corrosive media, the inner walls of the valve body and diaphragm valve are often impacted and corroded by the media, so it is necessary to check their pressure resistance and corrosion resistance.

CKD solenoid valve inspection of valve seat: Due to the infiltration of working medium, the threads on the inner surface of the fixed valve seat are easily corroded, causing the valve seat to relax;

Check the valve core: The valve core is one of the moving parts of the regulating valve and is severely corroded by the medium. During maintenance, it is necessary to carefully inspect all parts of the valve core for corrosion and wear, especially in situations with large pressure differentials where cavitation caused by valve core wear is more severe. Severely damaged spools should be replaced; Check the sealing packing: Check whether the asbestos rope of the packing is dry. If polytetrafluoroethylene packing is used, pay attention to checking its aging condition and whether the mating surface is damaged;

Check whether the rubber film inside the actuator is aging and whether there are cracks.

Daily maintenance of CKD solenoid valve

When CKD solenoid valves use graphite asbestos as packing, lubricating oil should be added to the packing for about three months to adjust the flexibility and usability of the valve. If the packing pressure cap is found to be very low, packing should be added. If the PTFE dry packing is found to have hardened, it should be replaced in a timely manner. During the inspection, attention should be paid to the operation of the regulating valve and whether the valve position indicator is consistent with the regulator output; Regularly use a locator to check the air source for regulating valves, and promptly address any issues found; The regulating valve should always maintain hygiene and component integrity.

CKD solenoid valves and even pharmaceuticals. Many processes require superheated steam; However, in the downstream stages of these processes, reducing the temperature and pressure of superheated steam can improve process efficiency, protect equipment, or promote the implementation of other processes. In industrial practice, regulating valves are generally used to reduce steam pressure, and cooling nozzles are used to reduce steam temperature.

This typical configuration is usually suitable for the process, but it requires a longer straight pipe. This also makes temperature control difficult, thereby limiting the overall cooling effect of steam and even limiting the range of process conditions that the system can operate under according to design. Steam regulating valve (also known as steam transfer valve or steam cooling valve) is a combination of steam pressure control valve and cooling device, and is a substitute for cooling nozzle.

It not only integrates dual functions, but also has very obvious features, including good temperature control performance and a large adjustment ratio. Moreover, due to its compact structure, small footprint, and low cost.

Receive control system signals, control the pressure changes of compressed air to output to the pneumatic actuator, drive the proportional expansion of the output shaft of the linear stroke pneumatic actuator, and the proportional rotation of the output shaft of the angular stroke pneumatic actuator, drive the valve core of the regulating valve to move, and complete the regulation of the medium in the pipeline. Automatic control is achieved by providing a 4-20mA feedback signal from the electric valve positioner to the control system.

The pneumatic actuators of CKD solenoid valves are divided into angular stroke pneumatic actuators and linear stroke pneumatic actuators. Equipped with straight stroke control valve and angular stroke control valve respectively. There are two types of straight stroke pneumatic actuators: pneumatic diaphragm type and piston type. The pneumatic angular stroke actuator is a piston type mechanism. Pneumatic thin film single seat regulating valve, pneumatic thin film double seat regulating valve, and pneumatic thin film sleeve regulating valve are straight stroke pneumatic regulating valves. Pneumatic V-shaped regulating ball valve and pneumatic butterfly valve are angular stroke pneumatic regulating valves.

CKD solenoid valves are easier to install than pneumatic control valves. Electric control valves do not require laying gas supply pipelines and can be directly connected to power and control signals for use. During use, the noise is relatively low and the movement is relatively smooth. The pneumatic control valve does not have any lag phenomenon in regulation. Electric control valves have a long service life and high performance, but they cannot automatically reset when power is cut off.

Moreover, CKD solenoid valves have relatively low costs and are widely used in the petrochemical industry due to their characteristics. Pneumatic control valves require accessories such as valve positioners, filter pressure reducing valves, and holding valves, and the installation process is complex. The rubber diaphragm needs to be replaced regularly. When the signal is interrupted or air flows out, the pneumatic control valve can be opened or closed to ensure the safety of the equipment.

1. Equipped with WL intelligent straight stroke electric actuator, small size, complete specifications, light weight, high thrust, easy operation, no adjustable potentiometer, high performance, low noise.

The WL electric actuator has a complete structure and self diagnostic function, making it very convenient to use and debug.

3. There is a digital display where you can see control signal values, feedback signal values, and electric manual values.

4. WL intelligent electric actuator function: fault diagnosis, alarm and protection functions, including power-off control signal. When the signal is cut off, the actuator or

5. Open; Or close; Or maintain; Or pre-set at any position between 0% and 100%. And it has valve blockage fault diagnosis, pipeline reporting, and protection functions.

6. Three way valves can replace two single seat valves or double seat valves, occupying less space and saving installation pipelines and costs.

7. It has the characteristics of high adjustment accuracy, adjustment performance, and allowable temperature difference less than 1.5 ℃.

8. The inner surfaces of the valve core and valve seat not only have liners at the reading cover, but also have guiding functions, with a large guiding area and good working performance.

9. The bellows sealing type forms a safety seal on the moving valve stem to prevent liquid leakage.