RPP Containers

CenterFlow Hopper Bottoms - Sacks the competition

emilyw • May 19, 2021

CenterFlow Hopper Bottoms - Sacks the competition

CenterFlow Hopper Bottom better than super sacks

The  CenterFlow Seed Box container  has become the industry standard in the storage and dispensing of  seed grain pellets resins powders , and other  flowable materials . The construction from high-density polyethylene means the  CenterFlow hopper bottom  will not rust, peel, or splinter and can handle thousands of pounds per load. The smooth, funnel-shaped interior has a 35˚ angle that ensures a steady flow of product. The adjustable slide gate allows one person to safely empty the hopper's contents in as little as 30 seconds. The versatile  CenterFlow hopper bottom  can be used in various applications, including  agricultural  settings for  seed and grains  or in an  industrial application  to store and dispense resin, pellets, and powders. 

Super Sacks

Traditional storage

Traditionally corn, grain, resin, seeds, powders, and other flowable materials would be stored and transported in a poly-woven super sack on a wooden pallet. Over time, the lateral pressure of flowable materials causes the super sack sides to bow, making stacking them unstable, only allowing them to be stacked two high and often causing them to topple over in storage. Poly-woven bags like super sacks are prone to cuts and punctures, which can cause major safety issues and the loss of product and money when the material can leak out. Most poly-woven bags can only be used a limited number of times before they must be disposed of and replaced, making it an unsustainable option.

CenterFlow Hopper Bottom extension ring

New and improved storage

DuraGreen CenterFlow hopper bottom containers  are available in four heights using the 9" collar. The small CenterFlow hopper bottom is 57" x 48" x 32"  and can hold up to 1,000 lbs. of product. Adding the 9" extender ring  to the small 57" x 48" x 32" hopper bottom, you get the 57" x 48" x 41" medium CenterFlow hopper bottom  . The medium 57" x 48" x 41" hopper bottom has a capacity of 1,500 lbs. The 57" x 48" x 65" is the large CenterFlow hopper bottom  and is the standard industry size and can hold up to 2,500. The large CenterFlow hopper bottom is the standard top and bottom ring without the 9" extender ring. The extra-large 57" x 45" x 74" CenterFlow hopper bottom is the 57" x 45" x 65" large CenterFlow hopper bottom with the 9" extender ring added to it. The extra-large 57" x 45" x 74" CenterFlow hopper bottom can hold up to an incredible 3,000 lbs. of product. Suppose you currently own either a 57" x 48" x 32" or 57" x 48" x 65" CenterFlow hopper bottoms. In that case, you can purchase the 9" extension ring separately to add some additional height to your hopper bottom container. 

CenterFlow Hopper Bottom parts

Safety first

Not only are the CenterFlow hopper bottom containers extremely efficient they are enhanced with special safety features: 
  • Secure-Fitting Lid – The lid features reinforced ribbing and corner stacking supports. The dome shape helps drain water from the top surface and provides extra protection against contaminants.


  • Safety Latches – Latches lock the ring securely to the base.


  • Adjustable Slide Gate – The slide gate allows one person to control the flow of contents safely. 


  • Four-way Forklift Access – Allows entry from all sides for secure and efficient handling.



  • Corner Hit Plates – Corner hit plates are made from galvanized steel and deflect forklift tines.

CenterFlow Hopper Bottom nesting

Efficient nesting storage

 The CenterFlow hopper bottom  is extremely efficient for storing and transporting products, but it is uniquely designed to maximize storage space up to 40%. A removable ring inverts and nests over the base for compact storage.

Return shipping for CenterFlow Seed Boxes

Secure stacking and nesting

57 x 45 x 32 CenterFlow Hopper Bottom

53' Trailer: 66 units assembled / does not nest

Stacking limit: Up to eight high 21.75' / does not nest


57 x 45 x 41 CenterFlow Hopper Bottom

53' Trailer: 44 units assembled / does not nest

Stacking limit: Up to six high 20.75' / does not nest


57 x 45 x 65 CenterFlow Hopper Bottom

53' Trailer: 22 units assembled / 44 units nested

Stacking limit: Up to four units high 21.25' assembled / up to four units high 12.85' nested


57 x 45 x 74 CenterFlow Hopper Bottom

53' Trailer: 22 units assembled / 44 units nested

Stacking limit:  Up to four units high 24.25' assembled / up to four units high 15.85' nested

 Do you have questions about CenterFlow Hopper Bottom Containers  ? Call 1-800-945-8304 or Chat Live  with one of our knowledgeable account managers Monday-Friday, 8 am-5 pm EST. You can also send us an email by visiting our contact page .

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