How many Twisters do I need on my tank?

The number of Twisters needed depends on the tank size and contents. A small tank (<60’ D, or 20 m) may only require 1 Twister. For most tanks, generally between 2 and 4 Twisters may be recommended, but the use of additional Twisters can reduce any “shadowing” behind tank internals. Being able to refluidize solids that can’t be directly reached by the jet stream of the Twister reduces the amount of time needed for detailed cleaning later. Often, the number of Twisters installed may be determined by the number of manways available. In some cases, as many as 7 Twisters have been installed on a 290’ D (88 m) tank in order to turn the tank around as quickly as possible.