Pneumatic Tankers ?

Anyone here know Pneumatic Tankers inside and out?

I have a local cement plant and may have an in to loads but i know very little about these trailers. I see 2 basic types one looks more like the standard tanker shape and the other is a more unique shape the 2 brands most comon seem to be Butler tanks and FRUEHAUF tanks.

Guess i need to know pros and cons between the 2 types.

Most likely ill haul cement and sand into the oil fields or deliver to customers that ship into the oil fields.

The conventional tank type looks like it would be be more stable with the lower center of gravity than the other type but will it do the job needed?

 

I dont think the tanker looking one would haul liquid , you might be thinking of a vacume tanker now that would be used for liquids.

The lower profile tanker looking ones still have 2-3 cones in them also but are ganged in a way or covered in a way they look more like one solid long tank.

 

That picture is the kind i see around here also.Look in truck paper under pneumatic trailers and you can see the other type im wondering about.

Isnt this the site that its a no no to post links?

 

Explain! It gets testy.Ill bet you meant during unloading and the hoses are all full and hard to get flowing again?????