Declining Weight

A Step Above

The Sackett-Waconia Declining Weight (DW) System is a revolutionary development in DW layering systems. What separates Sackett-Waconia’s DW from the others is its utilization of a proven, dependable mechanical design, unmatched sampling rates, and advanced automation to give the customer unprecedented speed, flexibility, dependability, and accuracy.

Accuracy and Flexibility

The accuracy of the Sackett-Waconia DW system is unmatched due to its load cells, controllers, and high sampling rates. Flexibility is achieved with adjustable gates giving each hopper a wide range of output.

The Sackett-Waconia DW control system uses a reliable PLC-based control system where individual rates, blend ratio, and final material quantities are all constantly monitored and adjusted.

Material is combined in an integrated “mixing zone” or in a standalone continuous mixer depending on your needs. These zones also offer a location to coat or impregnate an entire batch or incorporate powdered additives, prior to load out.


The Sackett-Waconia Declining Weight system features stainless steel hopper construction with extra width and holding capacity. Each hopper rests on stainless steel load cells and is supported by stainless steel framing. Dosing of each material is done via a stainless mesh chain feeder, providing accurate and even dosing, adjustable flow gates, and a very large feed opening to minimize flow issues. Mesh chain dosing technology was developed by Sackett-Waconia and has proven its reliability during its 15 years of operation in the US and around the world.

Sackett-Waconia DW System

Hoppers, Feeders, and Controls

Major Hoppers

Standard major hoppers are available from 5 tons to 20 tons and with single or dual feeders. All hoppers include all stainless construction. Advanced coating systems can be applied to any single hopper, or to multiple hoppers

Micro Hoppers

Micro hoppers hold 1.5 tons. Micro hoppers are mounted on stainless load cells and equipped with VFD drives.

Powdered Additive/WolfTrax® Hoppers

Powdered Additive hoppers on load cells are also available. These are available for granular or powder materials and developed to work with WolfTrax® products

Mesh Chain Feeders

Originally developed by Sackett-Waconia in 2005, the mesh chain feeder provides smooth, uniform, flow that is gentle on the granules while allowing for a deep material bed. Adjustable gates for flexibility are included as a standard, and direct-coupled drives on the mesh chain feeders keep maintenance to a minimum.


Each system comes with an easy-to-use PC-based interface. Formulas are entered into the system, either manually or through the integration of industry formulation software. The operator can see what materials are in each hopper, the amount in each hopper or additive feeder, and alarms indicating insufficient material in a hopper. DW systems can be controlled from the main operator station or by a remote tablet in the payloader.