We have Rosemount Vortex Flow Transmitter (Model 8800C) installed at water line. This line contains Dematerialize Water (0.5 µs) & Sea Water (60,000µs) - both type of water is passed through this line in different scenarios.
Minimum flow present in this line is: 1m3/hr.
Minimum Pressure present in this line is: 1.5 Kg/cm2
Upsteam Line Dia = 2”
Downstream Line Dia = 1.5”
LRV & URV Settings of this Vortex Flow transmitter is: 0 m3/h & 5m3/h.
The major problem is, Transmitters take a lot of time to grasp the reading once the line gets empty & refill. Also sometimes transmitter get Saturated at 105% or at 45% etc. etc irrespective the flow is present or not. Moreover We have 08 transmitters installed on 8 different pumps in same fashion for the same purpose & these problems are being faced on all transmitters.
Can you please suggest root cause of these transmitters problem?
We have already checked Float Type Switch, Turbine type (rota) flow meter for this application but both of them did not get successful.
In Float Type Switch, sea water salts deposited on the floating mechanism.
In turbine type flow meter, its rotor often got broken.
Also please suggest any alternate type of flow detecting instrument….
Which type of flow switch would work for our application (considering Demin & Sea water presence + flow rate).
[Any suitable type of Flow switch instead of transmitter would also work for our application as we just need to detect the presence of flow???]