Dry Solids Metering, Feeding, Weighing, and Handling Equipment

Improve Feeding Accuracy | Control Material Flow | Increase Process Reliability

We help identify and implement the right Acrison dry solids metering solution for powders, granules, flakes, pellets, ingredients, additives, and dry chemicals. From volumetric feeders and weigh feeders to bin dischargers, continuous blenders, bulk bag unloaders, dust collectors, and control systems, Acrison equipment helps manufacturers improve feeding accuracy, material handling reliability, and process control.

Get a Dry Solids Metering Recommendation

Volumetric feeders, weigh feeders, bin dischargers, continuous blenders, bulk bag unloaders, bin vent filters, dust collectors, bag dump stations, water treatment feeders, controllers, and control systems for dry solids handling applications.

Acrison Gravimetric Feeders

Model 407X Loss-in-Weight · Control ingredient mass flow using loss-in-weight measurement.

Discuss My Application Download Product PDF Technical Information

Acrison Model 407X-170-1 loss-in-weight feeder — Model 407X-170-1 loss-in-weight feeder

Control ingredient mass flow using loss-in-weight measurement.

Does your process need a controlled mass rate as material conditions vary?

The Acrison Model 407X mounts a selected metering mechanism and its supply hopper on an open-platform weighing system. As material discharges, the controller calculates the weight lost over time and adjusts the metering drive against the selected feed rate. The design supports continuous or batch dry-solids duties.

Typical application
Control an additive or ingredient feed in kg/h, or deliver a defined batch quantity.

Also known as: Loss-in-weight feeders, weight-loss weigh feeders, LIW feeders, gravimetric dosing systems.

What this feeder can help you do

Measure the material delivered

Weight feedback supports control of mass flow rather than relying only on a volume setting.

Match the metering mechanism

Choose the material-handling section for flowability, cohesion, particle size, and the required rate.

Integrate continuous or batch duties

Review the controller, refill system, and downstream process as part of the complete feed cycle.

How the feeding process works

Weigh the supplied material

The hopper and selected metering mechanism sit on the 407X weighing platform.

Compare weight loss with the setpoint

The weighing system sends weight data to the controller as product discharges.

Adjust and manage refill

The controller adjusts the metering drive. Hopper replenishment and the refill-control strategy are reviewed for the duty.

Materials & industries to review

Food & ingredient dosing

Powders, granules, or pellets with the correct mechanism. Review the required ingredient ratio, cleaning, and process variation.

Plastics & compounding

Additives, concentrates, and other dry ingredients. Match hopper behaviour and the metering mechanism to the material.

Chemicals & minerals

Suitable dry chemical or mineral products. Describe cohesion, aeration, abrasion, dust, temperature, and compatibility.

Metering-mechanism application video

See a Model 170-1 mechanism feeding potash

Acrison demonstrates the Model 170-1 metering mechanism, the mechanism type shown on the 407X-170-1 product configuration. This clip shows material handling and discharge; it does not demonstrate a complete 407X weighing loop or establish loss-in-weight accuracy.

Watch on Acrison’s official YouTube channel · Manufacturer video library

Material handling in practice

Include the lowest, normal, and highest mass rate, the density range, and the required averaging period for accuracy. Review refill transitions and external forces on the weighed assembly as carefully as steady operation. A mass-flow objective still requires a metering mechanism that handles the material reliably.

Potash discharging from a Model 170-1 in Acrison’s material demonstration. This shows the metering mechanism, not a complete 407X installation.

Acrison technicians evaluating a material sample beside feeding equipment in the test facility — Actual-product evaluation at Acrison’s material-testing facility. Use a representative sample and an agreed collection procedure to assess the proposed feeder.

Application imagery: Acrison.

Discuss an Actual-Material Trial

Manufacturer application history

Application example: controlling flour additives by weight

Acrison’s Nelstrop case history describes two Model 405-105 loss-in-weight feeders replenished by Model 105 volumetric feeders. Additive delivery followed a signal from the flour-weighing system. The project illustrates how metering, refill, and line-rate control work together. It is a loss-in-weight application example using Model 405 equipment, not a 407X installation.

Nelstrop flour-additive case history PDF - Model 405 system

Configuration & selection

Featured weighing system: 407X open-platform lever system with stainless steel flexures and Acrison’s Ratiometric Digital Weight Resolver.
Operating duties: Continuous or batch feeding of dry solids on a loss-in-weight basis.
Metering choices: Acrison offers different metering mechanisms for the 407X platform. The pictured arrangement uses a Model 170-1 mechanism.
Operating range: The current product page publishes a 100:1 feed range from the maximum designed output of the specific model or size. Confirm the usable range and accuracy for the material and duty.
Installation review: Refill equipment, flexible connections, supports, vibration, pressure influences, and controller integration affect the complete installation.

Options to discuss with RTS

Metering mechanism and hopper sized for the actual material
Controller and plant-control interface
Automatic refill and upstream supply arrangements
Quick-disassembly construction
Sanitary, high-temperature, or hazardous-electrical arrangements
Active-hopper option with compatible Model 170 mechanisms

Send a material sample description, minimum and maximum feed rates, bulk-density range, particle sizes, moisture, and a process sketch. Include the required accuracy, measurement interval, upstream refill method, cleaning needs, and available space.

Review My Feeding Requirements

Questions to settle before selection

What happens while the hopper is being refilled?

Refilling adds weight while the feeder is discharging, so the controller needs a refill strategy to maintain delivery through that part of the cycle. Review refill frequency, delivery speed, hopper capacity, and the process acceptance criteria together. Bulletin 897 explains the need for periodic refill.

Can we establish performance with our actual material?

Acrison offers witnessed equipment demonstrations and material testing. Agree on the feed-rate range, sample collection method, test duration, and acceptance criteria so the results reflect the intended process.

What should we include in the feeder review?

Consider the hopper, metering mechanism, weighing method where applicable, refill supply, controls, discharge connection, dust management, and access for cleaning. Identify which equipment and interfaces need to be included in the quotation.

PDF Literature & Technical Resources

Confirm capacity, accuracy test conditions, materials, drive, controls, and construction for your actual application. Product-family ranges and example installations are not a guarantee for every material or feeder size.

Compare the Acrison feeding methods

Meter by volume

Volumetric Feeders >>

Meter a controlled volume of free-flowing granules or pellets.

Example: Meter plastic masterbatch pellets or another suitable free-flowing ingredient into a process.

Also known as: Volumetric screw feeders, single-auger feeders, dry ingredient dosers.

Control by loss of weight

Gravimetric Feeders >>

Control ingredient mass flow using loss-in-weight measurement.

Example: Control an additive or ingredient feed in kg/h, or deliver a defined batch quantity.

Also known as: Loss-in-weight feeders, weight-loss weigh feeders, LIW feeders, gravimetric dosing systems.

Acrison Model 203-105Z weighbelt feeder with integral prefeeder

Weigh a continuous belt stream

Weighbelt Feeders >>

Control a continuous dry-solids stream with a weighed belt and integral prefeeder.

Example: Meter a continuous ingredient stream where a suitable prefeeder can deliver the material consistently onto the belt.

Also known as: Weigh belt feeders, belt weigh feeders, gravimetric belt feeders, continuous weigh feeders.