How to correctly use the regulator?

Regulating valve is often used in the daily pipeline valve control system, how to correctly use to increase regulation of life? Here are the steps and methods of use greatly improve the service life of the regulating valve: 1, the growth throttling channel to improve life growth throttling channel is the most simple and thicken the seat, seat hole growth, forming a longer throttling channel. On the one hand can make the flow closed type throttling after the sudden expansion of delay, its damage position, make them away from the role of sealing face; Added, on the other hand, thermal resistance, reducing the pressure recovery degree, the cavitation. Some seat hole design into terraced, wave, is to increase the resistance, weaken the cavitation. This method in the high pressure valve of the device and the old often used when the valve is improved, is also very effective. 2, change the valve structure to improve life method to change the structure or choose has a longer life of the valve to achieve the purpose of life, if choose multistage valve, the cavitation, corrosion resistant valves, etc. Increase with the decrease of S 3, improve life method reduce S job opening to increase system in addition to regulating valve damage, reduce distribution on the valve pressure drop, in order to ensure the flow through the valve, inevitably increase the valve opening, at the same time, the valve on the pressure drop decreases, and gets the corrosion, erosion is also reduced. After the concrete measures are: valve orifice throttling pressure drop consumption; Close the series manual valve on the pipeline, until the regulator to obtain ideal job opening. At the start valve to choose when you are working in a small open degree, using this method is simple, convenient and effective. 4, use special material to improve life for cavitation resistance ( Destruction shape such as honeycomb dot) And wash ( Streamlined small groove) Use of cavitation and erosion resistance, special material to make the throttling parts. This kind of special material, A4 steel, six yc - 1 department too, hard alloy, etc. For corrosion resistance, can convert more resistant to corrosion, and has certain mechanical properties, physical properties of materials. This material is divided into non-metallic materials ( Such as rubber, ptfe, ceramic, etc. ) And metal materials ( Such as monel, hartz alloy, etc. ) Two categories. 5, narrow diameter increase the job opening method of service life by making the work decrease to increase the calibre of the valve opening, the concrete measures are: in one of a small caliber valve, such as DN32 into DN25; The body does not change, change the small seat of the diameter of the valve core seat. If a chemical plant overhaul will throttle dgl0 replacement for dg8, life is doubled. 6 type, change to improve life away toward the open direction of flow, cavitation, erosion, the main role in the seal surface, make the root valve core and valve seat sealing surface damage to quickly; Flow towards closed closed type flow, cavitation, erosion effect after the throttle valve seat sealing surface, under the protection of the sealing surface and the valve core roots and prolong the life span. Pretended to use type valve, when life extension problems more outstanding, only need to change flow direction can prolong life 1 ~ 2 times. 7, the great opening work life extension method to let the regulator as far as possible from the start work on the opening, such as 90%. So, cavitation and erosion damage on the valve core in the head. As the valve core damage, traffic increases, the corresponding valve closed again a bit, so constantly, gradually close, make the whole valve core, make full use of until the valve core roots and sealing surface damage, cannot use. Work at the same time, the big opening the throttle gap is big, erosion is abate, this is the start valve opening in the middle and small open degree on the working life of 1 ~ 5 times above. If a chemical plant using this method, increased the service life of the valve 2 times. 8, transfer damage position to improve the method of life destroyed place transferred to a secondary position, with the core protection valve seat sealing surface and the throttling face.