Answer Posted / ali

dp(differential pressure) the pressure across dp can not permanent it changes with change in up stream pressure and also pressure change to down stream and velocity also increase at down stream side of orifice plate it is called differential pressure.

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SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

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