To solve the control valve card or blockage phenomenon of electric valve is more practical valve?

To solve the control valve card or blockage phenomenon of electric valve is more practical valve?

Under normal circumstances, the regulator is often stuck or blocked, this situation makes people especially bothered, so let the macro ball valve door to help you solve your troubles!
1) Cleaning method
Welding slag, rust and residue in the pipeline will cause blockage or jam in the throttling orifice, guide part and balance hole of the lower valve cover, which will cause strain and scratch on the surface of the spool and guide surface, and indentation on the sealing surface. This often happens in the new operation system and the initial operation after overhaul. This is the most common failure. In this case, must be removed for cleaning, remove the slag, such as sealing surface damage should also be ground; At THE SAME TIME, THE BOTTOM PLUG IS OPENED TO FLUSH OUT ANY RESIDUE THAT HAS FALLEN THROUGH THE BALANCE HOLE INTO THE LOWER BONNET AND TO FLUSH THE LINE. Before putting into operation, let the regulator fully open, medium flow after a period of time into normal operation.
2) External scouring method
For some easy to precipitate, containing solid particles of the medium with ordinary valve regulation, often in the throttle, the guide is blocked, can be scour gas and steam outside the bottom plug of the valve cover. When the valve is blocked or stuck, open the external gas or steam valve, can be in the case of the control valve to complete the flushing work, so that the normal operation of the valve.
3) Installation of pipe filter method
For small caliber regulating valves, especially super small flow regulating valves, the throttle gap is very small, there can not be a little residue in the medium. In this case, it is best to install a filter on the pipe before the valve to ensure the smooth passage of the medium. Regulating valve with positioner, positioner does not work normally, the gas choke blockage is the most common fault. Therefore, when working with a positioner, it is necessary to deal with the air source, and the usual way is to install an air filter pressure reducing valve in the air source pipeline before the positioner.
4) Increase the throttle gap method
Solid particles such as the medium or washed off in pipe welding slag and rust due to pass the throttle mouth such as congestion, jam, such as fault, can convert the throttle gap bigger throttle piece – throttling area of a window, open the valve core and the sleeve, rather than the circumference of a circle because of the throttling area of concentration distribution, fault can easily be ruled out. If it is a single, double seat valve can be changed to the plunger spool “V-shaped mouth spool, or into a sleeve valve. For example, some chemical plant has a two-seat valve often stuck, after the recommended use of sleeve valve, the problem was solved immediately.
5) Medium scouring method
The use of the medium’s own flushing energy, flushing and taking away easy to precipitate, easy to plug things, so as to improve the anti-blocking function of the valve. Common methods are: ① change to flow closed type; ② Adopt streamlined valve body; (3) Place the throttle orifice at the point of maximum erosion. By using this method, attention should be paid to improving the erosion resistance of the throttle material.
6) straight through to Angle method
The direct flow is an inverted S flow with complex flow path and many dead zones in the upper and lower cavities, which provides a place for the precipitation of medium. Angular connection, the medium is like flowing through 90 elbow, good scouring performance, small dead zone, easy to design into a flow line. Therefore, the use of straight control valve to produce a slight blockage can be changed to Angle valve so that the ℃.
What are the more practical valves in the electric adjustment valve?
Electric regulating valves include electric regulating butterfly valve, electric regulating ball valve, electric regulating valve, electric regulating gate valve, electric single-seat regulating valve, electric two-seat regulating valve and electric sleeve regulating valve and other types. Pneumatic control valve including pneumatic film control valve, pneumatic control ball valve, pneumatic control flange butterfly valve and pneumatic control on the butterfly valve type.
Electric adjustment butterfly valve is also called flip valve, is a simple structure of the regulating valve, connected with the actuator, can be used for low-pressure pipeline medium switch control. In the pipeline mainly plays the role of cutting and throttling. The opening and closing part of the electric butterfly valve is a disc-shaped disc plate, which rotates 90 degrees around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting. Electric adjustment butterfly valve is subdivided into the following categories:
Electric adjustment butterfly valve (small diameter) : has the characteristics of small starting torque, large flow capacity, small flow resistance loss, flexible operation, etc.
Electric adjustment butterfly valve, electric adjustment damper: suitable for metallurgical, light industry and other industries of blast furnace, heating furnace, gas station and other working occasions.
NAC electric adjustment butterfly valve: NAC electric adjustment butterfly valve conforms to JB/T8528-97 “Technical Conditions of common type valve electric Device”.
There are two kinds of power supply: 220V and 380V three-phase power supply (users can choose). The product is outdoor type and its protection grade is IP67.