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Also something I had left is that our control is that the pump is turning on when level goes down and turns off when we reach the desired level. This works we are controlling to within 3mm of the set point but we want sort of a constant pump flow not this on and off behaviour

Thanks littleinch We are able to control the water level within a range of 3mm from the set point. However the way we are controlling is that the pump turns on when water level is below setpoint and then we pump water into the boiler till we reach the setpoint. The pump then turns off afterwards...

We are operating in a range of 7-11 bar

Thanks for the help guys @PNachtwey yes we have pump curves from which I can calculate the speed at which the pump should be running to overcome the boiler pressure at the moment @GG so the general idea is to set the VFD to run at a minimum speed at which pump pressure can overcome the boiler...

Thanks guy for the help. It goes well appreciated. @ JGard1985: We cannot buy a new Control System, we are in a competetive business so a new control system would be much more expensive for us. But thanks for the suggestion we will keep it in mind @hacksaw Noted about the safety issues. We have...

Good Day The problem is I have a pressurized boiler and the feed water is pumped into the boiler using a pump which gets its input from a frequency inverter. The frequency inverter gets its input from a controller which monitors the water level in the boiler. The concern however is that the...

Good Day The problem is I have a pressurized boiler and the feed water is pumped into the boiler using a pump which gets its input from a frequency inverter. The frequency inverter gets its input from a controller which monitors the water level in the boiler. The concern however is that the...

Good Day . The problem is I have a pressurized boiler and the feed water is pumped into the boiler using a pump which gets its input from a frequency inverter. The frequency inverter gets its input from a controller which monitors the water level in the boiler. The concern however is that the...