Vari-Angle Side Entry Mixers
60° angular movement for complete tank cleaning and sediment removal. Over 15,000 units in service worldwide on crude oil, No. 6 F.O. & Bunker Tanks.
Why Jensen Vari-Angle Mixers Should Be Used on Crude Oil Tanks
Mixers equipped with the optional Jensen Vari-Angle feature will completely remove sediment build-ups from old tanks — providing freedom from manual tank cleaning. The Vari-Angle feature allows the flow stream to be directed to any area of the tank, assuring complete tank cleaning.
The Vari-Angle feature is a precision, ball-type stuffing box allowing 60° angular movement. Sealing is accomplished by Teflon® impregnated non-asbestos packing which is fully adjustable to eliminate leaks. Mixer weight is supported entirely by two heavy duty, pin type hinges. As with all Jensen Mixers, no turn-buckles, tie rods, bases, or other extra supports are required.
Key Benefits
- Completely removes sediment build-ups from old tanks — freedom from manual tank cleaning
- Vari-Angle allows the flow stream to be directed to any area of the tank for complete cleaning
- Increases storage capacity by elimination of BS&W (bottom sediment & water)
- Removes risk of water/sludge breaking free and entering desalter
- Avoids extended loss of tank use by traditional mucking out routines
- Avoids cost of traditional tank cleaning operations
- Keeps tank readily available for emergency repairs
- Avoids stratification — delivers uniformly blended crude cargo to refinery
The Value of Tank Bottom Sludge Recovery
Solids represent at best a few percent (1–2% according to Shell Oil Co.) of tank bottom sludge. Most sludge is refinable oil. Tank bottom sludge represents an inventory not being used.
A 286′ diameter tank contains 11,437 bbls/ft. So 2–3 ft. of sludge represents 22,874–34,312 bbls of "lost" cargo per tank. At $57.00/barrel, that is $1,303,818–$1,955,784 recovered per tank.
Recovery Value Calculator — 286′ Diameter Tank
2 ft of Sludge
22,874 bbls
recoverable volume
3 ft of Sludge
34,311 bbls
recoverable volume
Value Recovered
$1,715,550 – $2,573,325
per tank at $75.00/bbl
Based on a 286′ diameter tank at 11,437 bbls/ft. Sludge depth of 2–3 ft per Shell Oil Co. estimates. Adjust the price per barrel above to reflect current market conditions.
Angle Changes & Mechanical Actuator
Angle changes can be made easily by one man, or automatically controlled by the optional Mechanical Actuator. The actuator assures that the mixer continually moves across its sixty degree entry angle, from left to right and back to left, over a period of approximately ten hours running time.
The Jensen mechanical actuator consumes so little energy as to be nearly impossible to measure. It can be easily retrofitted to older mixers without concern for modifications to power sources.
Operating Procedure
Run mixers while filling tank & shut off 1–2 hours after tank is full.
Re-start mixers 4–6 hours prior to pumping out & initially check for solids content every hour until solids reach maximum allowable.
Repeat this operating procedure until a pattern can be established allowing a determination of the number of hours of mixer operation that yields maximum allowable solids concentration.
Once the tank bottom is clean, the incoming solids should be sufficiently low in concentration to pump them back out — ensuring that the tank bottom remains clean.
Major Users Worldwide
Ready to Eliminate Manual Tank Cleaning?
Contact our team to discuss Vari-Angle options for your Series 400 or Series 600 mixer application.
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Available On
15,000+ In Service
Jensen has more than 15,000 Vari-Angle Tank Mixers in service worldwide.