1. Opening work to extend the life-span method for the beginning of the valve to maximize the opening on the job, such as 90%. In this way, cavitation, erosion and other damage occurred in the spool head. With the destruction of the valve, the flow increases, the corresponding valve and then off, so constantly damaged, and gradually closed, so that the entire valve fully utilize until the valve core and sealing surface damage, can not be used so far. At the same time, the opening of large opening throttle gap, erosion weakened, which than the beginning of the valve in the middle of the opening and a small opening work to improve life expectancy of 1 to 5 times. Such as a chemical plant using this method, valve life increased by 2 times. 2. S to increase the work to reduce the opening to increase the life-span method to reduce the S, that is, increase the system in addition to the loss of control valve to reduce the pressure drop assigned to the valve, in order to ensure that the flow through the control valve will inevitably increase the control valve Opening, at the same time, reducing the pressure drop on the valve, cavitation, erosion also weakened. The specific measures are: set the orifice plate after the valve to save consumption pressure drop; close the pipeline on the manual valve in series to the control valve to obtain a more ideal job opening so far. The valve at the beginning of a large opening in the small work, the use of this method is very simple, convenient and effective. 3. Reduce the diameter to increase the work opening to improve the life of the law by reducing the diameter of the valve to increase the work of the opening, the specific methods are: ①for a small size of the valve, such as DN32 into DN25; ② body Do not change, replace the small seat diameter valve seat. As an overhaul of a chemical plant will be djl parts dgl0 replacement, life expectancy increased by 1 times. 4. Transfer damage to the location to improve the life of a serious damage to the transfer to a secondary location to protect the valve seat sealing surface and throttle surface. 5. Increase the throttling channel to increase life-span method to increase the throttle channel The simplest is to thicken the valve seat, the valve seat hole growth, the formation of a longer throttling channel. On the one hand, it can delay the sudden expansion of the flow-closure type after the throttle, delay the transfer and destroy the position and keep it away from the sealing surface; on the other hand, increase the throttling resistance and reduce the recovery of the pressure, Erosion diminished. Some of the valve seat hole designed to step, wave-type, is to increase the resistance, weaken the cavitation. This method is often used when introducing high-pressure valves in devices and improving older valves and is also very effective. 6. Change the flow direction to improve life Open flow toward the open direction, cavitation, erosion mainly on the sealing surface, so that the valve core and valve seat sealing surface quickly suffered damage; flow closed toward the closure of the direction of flow , Cavitation erosion role in the throttle after the valve seat sealing surface to protect the sealing surface and the valve root, extending the life. Used as open-flow valve, when the problem of extending life expectancy is more prominent, just change the flow direction can extend the life of 1 to 2 times. 7. Use of special materials to improve life expectancy France is anti-cavitation (damage to the shape of the honeycomb dot) and erosion (streamlined small groove), can be replaced by cavitation erosion and erosion of special materials to manufacture throttling pieces. This special materials are 6YC-1, A4 steel, Secretary too Lai, cemented carbide. For anti-corrosion, can use more corrosion-resistant, and have certain mechanical properties, physical properties of the material. This material is divided into two types of non-metallic materials (such as rubber, PTFE, ceramics, etc.) and metal materials (such as Monel, Hastelloy, etc.). 8. Change the valve structure to improve life expectancy Change the valve structure or choose to have a longer life of the valve approach to achieve the purpose of improving life expectancy, such as the choice of multi-stage valve, anti-cavitation valve, corrosion-resistant valve. 9 cleaning method Pipe in the welding slag, rust, slag, etc. in the throttle, guide parts, under the valve cover to balance the hole caused by blockage or stuck so that the valve surface, the guide surface of the injury and scratches, sealing surface On the indentation and so on. This often occurs in the early delivery of new delivery systems and overhauls. This is the most common failure. In this case, you must uninstall the cleaning, remove the slag material, such as the sealing surface is also damaged should be ground at the same time the bottom plug to open to flush away from the balance hole into the valve cap slag material, and the pipeline Rinse. Put into operation before the valve is fully open, medium flow into the normal operation after a period of time. 10. External scouring method For some easy to sediment, the medium containing solid particles using ordinary valve adjustment, often in the throttle, the guide block, can be flush at the bottom of the valve cover flushing gas and steam. When the valve is clogged or stuck, open the external gas or steam valve, you can complete the flushing work in the case of the valve does not move, so that the valve normal operation. 11. Install the pipeline filter method on the small-caliber control valve, especially the ultra-small flow control valve, the throttle clearance is very small, medium can not have a little slag material. In this case of blockage, it is best to install a filter on the valve before the pipeline to ensure the smooth passage of media. Control valve with locator, locator is not working properly, the air passage choke plug is the most common failure. Therefore, with the locator work, you must handle the gas source, the usual approach is to install the air filter in front of the locator air line pressure reducing valve. 12. Increase throttling gap method If the solid particles in the medium or the pipe was washed away the welding slag and rust and other overcrowding caused by clogging, stuck and other failures, can be used to throttle large gap section Flow - throttling area for the window, the opening of the spool, sleeve, because of its throttle area rather than the distribution of the circumference, the fault can be easily ruled out. If it is single, two-seater valve plunger can be changed to "V" -shaped spool, or into the sleeve valve. For example, a chemical plant often have a double-seat valve stuck, it is recommended to switch to sleeve valve, the problem was resolved immediately. 13. Medium scouring method uses the medium's own scouring energy, scour and remove easy to sediment, easy to block things, thereby enhancing the valve's anti-blocking function. Common methods are: ①closed for the flow of closed-type use; ② the use of streamlined body; ③ the throttle placed in the erosion of the most powerful, using this method should pay attention to improve the erosion-resistant materials, parts erosion. 14. Straight through to the angle method Straight through the inverted S flow, the flow path is complex, the upper and lower cavity dead zone, provides a place for the precipitation of the medium. Angular connection, like 90 ° elbow flow through the medium, erosion performance, small dead zone, easy to design streamlined. Therefore, the use of straight through the control valve can be slightly blocked when the valve can be changed to use. 15. Grinding fine grinding to eliminate traces, reduce or eliminate the seal gap, improve the sealing surface finish, to improve the sealing performance.
Moving Clock Series, fully designed and developed by Mid-Clock R&D team, CE and RoHS Marking approved.
16 years ago we made the first Alarm Clock for a Japanese company, it's been developed and tested for over 3 months, in order to find out the suitable sound that can wake people up but won't shock people up.
In Moving Clock Series, we have a lot of different styles patterns which must be catch your eyes,like cat, dog, heart. The special point is that they are moving with time going, which will have a great show.
We can provide customized service with ordering a MOQ at 300PCS, like printing the LOGO.
China Moving Clock Factory, Moving Clock Factory in China.
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