Different Types Of Instruments जो Industry में प्रयोग किया जाता हैं|PT/PDT/FT/LT/VALVE/RTD|In Hindi| 

1.If the available size of the valve is lesser in size as compare to pipeline Size then we reduced the pipeline size so that the Pipeline OD and Valve OD is same to proper fittings. 2.If Lesser Valve Size is used with bigger pipeline Size then there is not much requirement of Flow/Pressure etc. That's why we are using smaller size Valve.