Answer / kuber

The pressure will be proportional to the flow rate, as the
flow rate increases the pressure at inlet of the valve will
increase. then the valve starts to close relatively.

Answer / r.murugan

if pressure transmitter installed before pcv (example sp
10bar) suddenly pipe line flow increase pressure will
increase but as long as controller an auto controller will
give command to open the valve to maintain the setpoint pressure

if flow rate is less pressure is coming down less than
setpoint controller will give command to close the valve to
maintain the pressure (if pressure tapping before control
valve)

Answer / benny

reduce opening

Answer / triptisliet@gmail.com

according to bernauli's theorem total enerngy will remain
same so if velocity increases then pressure decreases.

Answer / tony lorenzo

If the controller is in Auto that time, and provided its been tuned, the pressure should remain as is. The PCV valve should open as expected, how much? we dont know.

what is difference between venturi and orifice

1 Answers  

why 4-20 mA in covection system?

3 Answers  

We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

HI FRIENDS IHAVE QUESTION 1.WHAT IS PARTIALSTROKE TEST?WHY IT IS USED ON ESD ON OFF VALVES?

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How to O2 analyzer works?

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give classification of transducer based on type of application

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what is sinking and sourcing....

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how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

0 Answers   United Phosphorus,

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how we calculate error in percentage when instrument calibrat

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How many types of sensor

0 Answers   Petro Rabigh,

what barrier is used in process industry.

3 Answers   ADMA OPCO, Process Industries,