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Onion Self-Supporting Tanks

The “Onion Self-Supporting Tanks” are self-rising circular “onion” shaped reservoirs / bladders used for water storage, firefighting, and disaster relief efforts. The self-rising / floating collar is made of either closed cell foam or air filled.

Many heavy duty fabrics are available for the construction of these liquid storage tanks which can be used in different environments for bulk liquid storage and transportation. Problems with inadequate or unusable supplies of water are eliminated by the use of onion self-supporting portable water tanks. In remote areas, these tanks are designed for standby water containment, water shuttling situations, and provide a continuous portable water supply.

Complete systems including fluid transfer pumps, hoses and Helicopter Liftable fluid transfer containers are also available.

Some of the Open Top Tanks features are:

  • Rapid emergency response
  • Suitable for most environments and terrain
  • Connections are 180 degrees apart, but can be located anywhere on the tank at the client’s request
  • Fast response tanks that take just minutes to set up with limited personnel
  • Material and all fittings are appropriate for either potable water or hydrocarbons
  • Multiple 2” thru 6” connections can be placed anywhere on the tank providing the capability to discharge liquid quickly from any side of the tank
  • Material and all fittings are appropriate for either potable water or hydrocarbons.
  • Replaceable inner liner (optional)
  • Top cover (optional)

Applications include, but not limited to:

  • Spill Response
  • Hazmat Operations
  • Military Operations
  • Potable (drinking) Water Tank
  • Disaster Relief
  • Fuel Storage
  • Firefighting
  • Forestry Service
  • Wastewater
  • Portable Storage
  • Remote Storage
  • Gray Water Storage
  • Portable Water Tank
  • Chemical Storage
  • Remediation Projects

Capacities range from 2 to 94.6 m³ (500 to 25,000 gallons).

Canflex Open Top Tank - Self Floating Foam Collar "CF" and Air Filled Collar "CA"
Model CA = AIR COLLAR CF = FOAM COLLAR Capacity Full Dimension *Shipping Volume Dry Weight without accessories Fill / Offload Connections
Base Diameter (Ø) Collar Diameter (Ø) Height
m³ / Barrels m m m kg
USG ft ft ft ft³ lbs
CA-2CM CF-2CM 2.0 / 2,000 2.3 1.4 0.97 0.6/ 0.9 82 1 x 2” NPT
500 7.6 4.7 3.2 21 / 32 180
CA-4CM CF-4CM 4.0 / 4,000 3.0 1.8 0.97 0.6/ 0.9 86 1 x2” NPT
1,000 10 5.8 3.2 21 / 32 190
CA-6CM CF-6CM 6.0 / 6,000 3.7 2.4 0.97 0.7 / 1.1 96 1 x2” NPT
1,500 12.0 8.0 3.2 24.5 / 39 210
CA-8CM CF-8CM 8.0 / 8,000 3.8 2.7 0.97 0.7 / 11 127 1 x2” NPT
2,100 12.5 9.0 3.2 24.5 / 39 280
CA-10CM CF-10CM 10.0 / 10,000 4.7 3.2 0.97 0.8 / 1.3 195 1 x 3” NPT (2” for E model)
2,650 15.4 10.6 3.2 28 / 50 430
CA-12CM CF-12CM 12.5 / 12,500 5.0 3.5 1.18 0.8 / 1.3 195 1 x 3” NPT (2” for E model)
3300 16.4 11.5 3.9 28 / 50 430
CA-15CM CF-15CM 15.0 / 15,000 5.5 3.81 1.21 0.9 / 1.5 218 1 x 3” NPT (2” for E model)
4,000 18.0 12.5 4.0 32 / 53 480
CA-20CM 20.0 / 20,000 5.8 4.3 1.21 1.56 255 1 x 3” NPT (2” for E model)
5,300 19 14.3 4.0 55.0 560
CA-25CM 25.0 / 25,000 6.0 4.3 1.21 2.0 290 1 x 3” NPT
6,600 20.0 14.3 4.0 71 640
CA-30CM 30.0 / 30,000 7.0 4.3 1.21 2.1 313 2 x 3” NPT
8,000 23.0 14.3 4.0 74 690
CA-38CM 38.0 / 38,000 7.0 4.3 1.52 2.4 400 2 x 3” NPT
10,000 23.0 14.3 5.0 85 880
CA-50CM 50.0 / 50,000 7.62 5.8 1.52 3.0 430 2 x 3” NPT
13,200 25.0 19.0 5.0 106 950
CA-60CM 60.0 / 60,000 8.0 5.8 1.52 3.1 485 2 x 3” NPT
15,800 26.3 19 5.0 110 1,070
CA-75CM 75.0 / 75,000 9.4 7.11 1.52 4.8 567 3 x 3″ NPT
20,000 31 23.3 5.0 170 1,250
CA-100CM 100 / 100,000 11.3 7.11 1.52 5.5 658 3 x 3″ NPT
26,400 37.0 23.3 5.0 195 1,450
  *ADD 10% more shipping volume for “CF” models with self floating foam collar
Open Top wit foam collar
Open Top Tanks

Onion Self-Supporting Tanks

Capacities: 2m³ to 100m³

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