Hello I&C experts,
I need your advice how to solve the problem that repeats itself now two times.
In a power plant there is a feedwater pump that supply water to the boiler. Pressure of the feedwater is about max 150bar. A pressure is measured immediately after control valve. During startups this valve is manipulated by the operator. It seems that because of the sudden valve's opening pressure transmitter is damaged. Pressure transmitter that is used is SITRANS P with Max. perm. test pressure 250 bar, and nominal range 0 to 160 bar. But so far it happens twice that this transmitter starts working after plant is started. There is an idea to extend impulse pipe or even to make it like letter U in order to prevent sudden pressure changes. The pressure transmitter becomes faulty when control valve is open for the first time (on one side is 145 bar, on other 1 bar).
What could we do in order to "cushion" or soften this pressure change?
Thank you in advance for any suggestions.
I need your advice how to solve the problem that repeats itself now two times.
In a power plant there is a feedwater pump that supply water to the boiler. Pressure of the feedwater is about max 150bar. A pressure is measured immediately after control valve. During startups this valve is manipulated by the operator. It seems that because of the sudden valve's opening pressure transmitter is damaged. Pressure transmitter that is used is SITRANS P with Max. perm. test pressure 250 bar, and nominal range 0 to 160 bar. But so far it happens twice that this transmitter starts working after plant is started. There is an idea to extend impulse pipe or even to make it like letter U in order to prevent sudden pressure changes. The pressure transmitter becomes faulty when control valve is open for the first time (on one side is 145 bar, on other 1 bar).
What could we do in order to "cushion" or soften this pressure change?
Thank you in advance for any suggestions.