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The response time of a Control valve getting slower day by day due to the aging effect. we can remove this effect.
Due to ageing effect & friction due to dust, moisture lead to delay response. So, clean trim of valve and put some lubricant.
Note: oil & lubrication not to be used in oxygen gas and burning gas.
these are the reasons which found in hydraulic sys working slowly
pump performance
condition of suction stainer and out pressure filter
adjustment of pressure control valve
