I had a weird problem with an air off today.

I followed your story very well.

I wonder if there is a check valve that prevents your trailer from sending product into your exhaust turbo at the tractor? You follow me? If that valve failed nothing will blow to customer and might even go through this one valve and try to choke your exhaust turbo.

I lost a check valve once and boom the entire cement plant dumped my product via the pipes through to my exhaust. Ending the unloading for several days.

 

Heavy, Ethos is unloading liquid latex via a liquid tanker. Using a garden hose attached to the dome lid, pushing the product out.


Also,


These days, pneumatic tank haulers have a seperate air pump on the tractor for blowing with truck air. Not too many people like exhaust blowing food products or even cement any more.

 

i'm on a dedicated latex acct. i've heard about lumps in product coming from rail cars in the northeast to where it needs filtered twice before mixing... so i'll guess lumps. But then i don't air off and it's usually their hose and pnuematic pumps (which do freeze some)

 

Fair enough.

Some trucks on the catwalk had a turbo blower fed by exhaust behind the cab. Hook that hose to it, run to tanker input. Run tractor engine to max. Flip turbo to run off the tractor to start feeding pressure into trailer prior to unloading your first pot.

 

But! He doesn't have a pneumatic tanker!

 

And Latex is smooth bore tank, since it needs to be cleaned after every use. Or else it will develop clumps when you load it again.
Which is why i went with blockage for my guess about this post, i see pieces of latex when i do my sample from the drain, from time to time. Mostly when i have Soya Alkaloid resin that goes in the exterior paint/stain products, since the white globs are easy to see

 

Just sounds like the air couldn't keep up. We have customers that provide air but do it via a 3/8 hose and it can't keep up. Our tractors have blowers and 1/2 hose so it's easier for me to use my own air.

 

Had a similar situation happen to a guy the other day at a paper mill, he thought something was wrong with the trailer. Turns out the plant had diverted airflow to another area for a while.