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We have a 4000 gal ex-fuel tanker in our department. In order to gravity drain fast we must claim up on top of the tanker and manually open the hatches. I have been thinking of putting air cylinders to do this. Has anyone done this or any other mod that would do the the trick. We are a team in Northwestern Ontario so I have to consider ice and snow in the winter.
We have a 4000 gal. tanker that was put together through Denver Truck Sales in CO. our county has several of these, the way they're setup is with a large bore (8") vent pipe that turns down after exiting the rear of the tank. No hassles here.
Good Luck, Frank
Our 2000 gallon elliptical stainless steel built by Amthor has a self venting 24" ? manhole. We dump 2000 gallons in 45 seconds through our 12" square dumps with no problems. We also fill directly into the tank through a 5" by 2 - 2 1/2 gated suction siamese. Both of these were added in house over the years. The truck used to have an eight inch "jet dump" - JUNK