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What can be the issues if a control valve response time getting slower day by day?

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Question added by Waqar Ahmed , Instrument Technician , ADNOC Gas Processing
Date Posted: 2014/12/30
Muhammad Sabir
by Muhammad Sabir , Instrumentation & Control Mentainer , Karachi Power Plant (KANUPP)

The response time of a Control valve getting slower day by day due to the aging effect. we can remove this effect.

Ashfaq Ahmad
by Ashfaq Ahmad , AGM -Basic Engineering -Instrumentation and Control , SMS Group

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.

abdul shafiq
by abdul shafiq , hydraulic barrier supervisor , baharia town karachi

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

 

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