Help please pneumatic tank drivers

Here is a step by step video your trailer might be slightly different but the concept is pretty much the same regardless of trailer.

 

I think a lot has to do with what you are unloading and into what?
I do cement & Fly Ash and at concrete plants for the most part about 1 to 1.5 hour.
I have a pre-cast plant I go to and it has taken 3 to 4 hours because their system is so crappy with a LOT of back PSI.

I have also unloaded into a hopper trucks used to spread it on the ground, they then use a big ##* tiller to mix it in and add water and roll it out. Depending on what truck it is about 1 to 1.5 hour also because it can only hold half my load at a time. The hopper trucks are a max of 10 PSI to keep from blowing the bag filters out but because you don't have to push it high you can open the hopper valve almost full open.
Dave ----

 

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I made a mess I removed hose from truck and clogged the line.. How could I prevent from doubles trailer

 

Did caustic soda beads with a customer trailer.which had a large desiccant tank mounted on the rear. you opened the inlet to it and hooked the outlet to the intake side of your blower so you sucked in dry air. you opened the line and blew out the customer's pipe for 30 min to make sure it was dry before sending the beads out.

drop some of the sample on the blacktop and the humidity in the air would liquefy it into a little pool of caustic...

you didn't want to plug that stuff at all.....

 

Never disconnect a hose till its empty, plugged or not. You dump the pressure in the tank, leave the vent open, idle the blower, open the line air, open and close the product valve, this will pull the load back into the trailer. Still going to be dusty but better than having to clean product up off the ground.

 

hour to hour and a half is really slow. I normally unload about 20 minutes per trailer, and normally I unload both if the plant is set up to handle that, still both same time 20 minutes.

 

I use Cornhusker's Lotion. It's cheap and found in any Walmart among the he expensive lotions. It's great as a shaving cream and after shave "tightener".

The times I delivered cement there was always a tech to handle the offload. I have frequently had to "blow down" the tanks after returning to the customer yard to make sure the tanks are ready for the next load.

 

I don't know doubles but anything under a hour has to be good.

I run or ran rather Cement and I can get it out of a 40 foot heil or butler in about 50 minutes. Mortar on the other hand, I only hauled one of that. That one took 3 hours.

You have been given good instruction here. All i can do is add two things.

NEVER. EVER go top of a pressurized trailer. If you undo enough bolts that hatch will explode the product all over the property and kill you before you hit the ground 70 yard downrange. Make sure your emergency dump valve is open and that both or all gauges read zero pressure on that tank.

Second. One of my favorite tips to prevent a plugging is to watch the discharge product hose to the silo pipe. As long it's snaking on the ground and a occasional hop combined with me standing on it and feeling that liquid like movement of material all is well.

If it starts to sit still and not snake combined with no feeling of movement under your feet, close the product line instantly (The pot, shut it off) and open your discharge air line all the way to pus whatever is in there before it has a chance to plug. When your gauges reach 10 pound quickly stand on that hose and it should almost go flat under your feet with a feeling of pure air moving under it.

Begin to build pressure back up and resume unloading that pot.

I don't want to type anymore tonight and get deep on this as I have in the past. Just those two lessons is enough for now.