Regulating valve installation and method to improve the life of the regulating valve installation process should pay attention to the following questions: ( 1) Regulating valve before installation, must be carefully remove the dust accumulated by the valve during storage, during the installation process will keep clean. Because dust impurities will make the seat and damage of internal parts. In order to protect the clean, usually in the incomplete opening flange end plate. ( 2) When regulator is installed, the arrow on the valve body shall be consistent with the medium flow direction. ( 3) Control valve is a precision component, if they are stress of the pipe deformation, will damage the normal work. Therefore, flange and pipe installation should be vertical and position accurately in order to avoid deformation of the pipeline. Wells and pipelines to the appropriate support to prevent it in bending deformation under the action of the valve weight. ( 4) When regulating Industrial Valves and pipe welding must be especially careful. If not enough attention during regulating valve and pipe welding, failed to eliminate stress, will produce deformation. When welding, must strictly avoid welding slag splash into the valve, the existence of welding slag detrimental to the performance of the valve, if the splash splashing on the valve core directly, light directly affects the action of regulating valve, or damage to the valve core and valve seat. ( 5) Pipeline during pressure test and blow, the regulator should be removed, with the corresponding straight pipe connected to prevent welding slag, iron chips sundry card between valve core and valve seat. Remove the valve opening flange end application plastic cloth bandage firmly.

1。 The big opening working life extension method

let regulator as far as possible from the start work on the biggest opening, such as 90%. So, cavitation and erosion damage on the valve core in the head. As the Industrial Valves core damage, traffic increases, the corresponding valve closed again a bit, so constantly, gradually close, make whole all make full use of the valve core. 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.

2。 Job opening improve life increase with the decrease of S set method after the 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.

3。 Narrow caliber increase the job opening life

by the regulating valve diameter decrease to increase the job opening, the concrete measures are: (1) in one of a small caliber valve, such as DN32 into DN25; (2) the body does not change, change of small seat of the diameter of the valve core seat. If a chemical plant overhaul will throttle dgl0 replacement for dg8, life is doubled.

4。 Transfer damage location to improve life

transferred to a secondary position, destroyed the place with protection valve core seat sealing surface and the surface of the throttle.

5。 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.

6。 Change to improve life method

flow towards open type 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.

7。 Method of use special materials to improve life

as 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.

8。 Change the regulator structure 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.

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