MPW
New member
I've uncovered a frustrating and perplexing problem...
Titrating low and high ph on an IBA the other day, discover neither boom nor sides on high ph will titrate even with dosing pump maxed out. Assume it's the pumps. Change both pumps, boom now titrates fine, but sides won't... And that started a week of wasting time on this stupid problem, including: new foot valve, new line from barrel to dosing pump, a THIRD dosing pump, running a direct line from dosing pump across bay to where it ties in right before mixing with water (was hoping it was the line, nope), changing check valve between chemical line and tee that mixes with water, removing injector in said tee, collecting for titration from all different nozzles thinking somehow one side might be different than another, experimenting with changing pressure on presoak pump, comparing purge directly off line on low and high ph and they seem to be the same (that is, the high ph line seems to be feeding plenty of chemical, but where is it going?). My father, who used to install these machines all over the state years ago has spent several hours on it, have had long conversations with the local tech, 40 minutes on the phone with Mark VII... have gotten nowhere.
I know it isn't the chemical, it titrates just fine on the boom and directly from the barrel.
It can't be anywhere from the barrel to the end of the chemical line as that has all been replaced.
I did also discover that the solenoid on the boom was busted at the same time as the titration nonsense started-- boom was purging when only sides should have been. That was fixed immediately and seems to be unrelated.
Pressure on presoak pump is at 65, per Mark VII. At 40 it titrates hardly any different. I've even tried swapping pumps.
There's a bypass line that Ys into the presoak pump for the hub scrub that's got a solenoid on it. It's fine.
I haven't ripped every single panel of the gantry all the way along but there do not appear to be any leaks anywhere, visually comparing high and low ph chemicals spray/pressure wise they look identical so probably not any kinks... but maybe?
Does anyone have any ideas? This is ridiculous and a real head scratcher. It's gotta be something stupid and easy but so far no AHA! moments...
Titrating low and high ph on an IBA the other day, discover neither boom nor sides on high ph will titrate even with dosing pump maxed out. Assume it's the pumps. Change both pumps, boom now titrates fine, but sides won't... And that started a week of wasting time on this stupid problem, including: new foot valve, new line from barrel to dosing pump, a THIRD dosing pump, running a direct line from dosing pump across bay to where it ties in right before mixing with water (was hoping it was the line, nope), changing check valve between chemical line and tee that mixes with water, removing injector in said tee, collecting for titration from all different nozzles thinking somehow one side might be different than another, experimenting with changing pressure on presoak pump, comparing purge directly off line on low and high ph and they seem to be the same (that is, the high ph line seems to be feeding plenty of chemical, but where is it going?). My father, who used to install these machines all over the state years ago has spent several hours on it, have had long conversations with the local tech, 40 minutes on the phone with Mark VII... have gotten nowhere.
I know it isn't the chemical, it titrates just fine on the boom and directly from the barrel.
It can't be anywhere from the barrel to the end of the chemical line as that has all been replaced.
I did also discover that the solenoid on the boom was busted at the same time as the titration nonsense started-- boom was purging when only sides should have been. That was fixed immediately and seems to be unrelated.
Pressure on presoak pump is at 65, per Mark VII. At 40 it titrates hardly any different. I've even tried swapping pumps.
There's a bypass line that Ys into the presoak pump for the hub scrub that's got a solenoid on it. It's fine.
I haven't ripped every single panel of the gantry all the way along but there do not appear to be any leaks anywhere, visually comparing high and low ph chemicals spray/pressure wise they look identical so probably not any kinks... but maybe?
Does anyone have any ideas? This is ridiculous and a real head scratcher. It's gotta be something stupid and easy but so far no AHA! moments...
