Near Intersection of I-35 & I-90 Southern Mn. | Push the Vol/min key and observe what it is doing. The Vol/Min is a representation of the speed that the turbine in the flow meter is turning. If it is stable then the problem is likely a speed issue which can be checked my pushing and observing the Area/Hr reading. Ideally they would both be stable.
I suspect you will see the Vol/Min jumping around which means the turbine speed is not stable. This can be due to several reasons. One might be debris in the flow meter itself. Another might be that the turbine and/or housing is in need of repair. Running the NH3 tanks empty will cause damage to the turbine/housing since the pockets of vapor that are present when you run the tanks empty cause the turbine to spin at tremendous speeds.
Another common cause is lack of tank pressure with large bars, high rates, high ground speed etc. I agree that two coolers on an 18 tooth rig should be sufficient with moderate temperatures weather if they are plumbed properly. Break away couplers and restricted plumbing/strainers etc. all add to the problem. You say you have two tanks and two coolers. Does each tank have its own separate plumbing and break away of sufficient size leading to its cooler and the outputs are plumbed together to a single flow meter?
Next time this happens, ty slowing down considerably to see if the rate and Vol/Min stabilize. Often they will which is a sign that you are trying to apply the NH3 faster than the tank pressure can resupply the system. This is another indications of a restriction.
If you system has a tank pressure gauge, it should show tank pressure when stopped (not applying). If you turn the system on and start moving slowly, the indicated pressure will drop somewhat. As you speed up, the control valve should open more and the pressure will drop even more. The pressure drop should not exceed 7 psi or you will have the problems you describe. |
Need Raven 440 nh3 help
