How to use this guide
Use this guide to prepare your requirements. Contact us if you need help choosing a configuration.
“Powder” is not one predictable material class. Two products with the same target weight can require different feeders, agitation, dust control, hopper geometry and cleaning procedures. A useful powder filling machine RFQ therefore starts with material behavior and a measurable acceptance plan.
1. Identify the product and its variability
Give the material name, intended use and supplier grade. Record bulk density and how much it varies between batches. Include particle-size information if available, but also describe what operators see: free-flowing, cohesive, dusty, fluffy, granular, oily, electrostatic, hygroscopic, prone to bridging or likely to compact under vibration. Photos and a short pouring video can reveal behavior that a product name cannot.
State whether the material separates, settles or changes after transport. Powders may aerate when first loaded and become denser later, which changes volumetric dosing. If the recipe contains components of different particle size or density, explain whether segregation is a concern. Do not present a dosing tolerance as guaranteed until the actual material and test method have been reviewed.
2. Define the target weight and package
List the minimum, normal and maximum target weights, the permitted tolerance at each point and whether compliance is judged by individual packs, average weight or another rule. Provide the package type, dimensions, opening, material, rigidity and closure. Small openings, unstable bottles, thin pouches and static-prone films can affect nozzle design and handling.
Explain whether packages are manually placed, indexed or conveyed. For pouches, state whether they are pre-made or formed by the machine, and provide film structure and sealing information. For bottles or jars, provide cap and label requirements if the project includes downstream stations. The package and the dosing system must be assessed together.
3. Choose the dosing principle from evidence
Common approaches include auger dosing, cup or volumetric dosing, gravity feeding and net-weigh or combination weighing. The correct choice depends on flow, density variation, target weight, tolerance, output and cleaning—not simply on whether the product is called powder or granule. Ask the supplier to explain why the proposed principle matches the sample and what conditions limit performance.
An auger can provide controlled displacement for many powders but still needs suitable hopper agitation, feed consistency and calibration. Volumetric cups are simple for stable free-flowing products but respond to density changes. Weighing can compensate for some variation but has its own speed, vibration and feeding constraints. The RFQ should request a reasoned selection rather than a generic machine picture.
4. Document dust, containment and operator exposure
Describe visible dust, inhalation concerns, explosibility information, allergen status and cross-contamination risk. State how material is loaded into the hopper and whether local extraction or an enclosed transfer is expected. A standard machine must not be assumed suitable for a combustible-dust or hazardous area. Those applications require a dedicated risk assessment, site classification and configuration review by qualified parties.
Dust also affects sensors, seals, bearings, electrical cabinets and housekeeping. Ask where dust can escape, how the nozzle interfaces with the package and which surfaces are difficult to reach. The buyer should define the factory’s containment and cleaning program; the equipment supplier should clearly describe the machine boundary and available provisions.
5. Define output using real operating conditions
Provide the required good packs per minute or hour, shift duration and expected changeovers. Ask for output assumptions including target weight, bulk density, feeder rate, settling time, number of dosing heads, operator actions and package handling. A high feeder rate is not the same as stable accepted output.
For manual or semi-automatic systems, include filling, package transfer, closure and weighing tasks in the cycle. For automatic lines, identify the bottleneck station, accumulation and response to a refill or stoppage. Request the tested condition or an estimated range pending sample trials.
6. Agree on calibration and FAT
A meaningful test defines the sample lot, environmental conditioning, target weight, scale resolution, warm-up, number of consecutive packs, adjustment method and acceptance calculation. Record rejected or interrupted cycles instead of silently removing them. If production material cannot be shipped safely, agree on the limits of a substitute-material test and plan final site verification.
After order, MUJIU can coordinate tests on the delivery machine when representative material and packages are available and shipment is lawful and safe. The signed technical agreement should control the test, not a general marketing tolerance.
7. Plan cleaning and changeover
List all products expected on the machine, changeover frequency, allergen or cross-contact concerns and the required cleaning evidence. Ask which contact parts detach, what tools are needed, how the auger or feeder is accessed and where residual powder remains. Define whether the user needs dedicated contact sets, recipe controls or line clearance checks.
Cleaning, sanitation and validation remain application and site responsibilities. A material declaration or stainless-steel statement does not by itself prove food, pharmaceutical or sterile suitability.
Powder filling RFQ data pack
- Product name, grade, bulk-density range and particle information.
- Flow, dust, moisture, static, compaction and segregation behavior.
- Target weights, tolerance method and production output.
- Package drawings, samples, closure and label steps.
- Material loading, hopper refill and dust-control expectations.
- Cleaning, cross-contamination and changeover requirements.
- Destination utilities, layout, documents and regulatory environment.
With this data, MUJIU can compare dosing principles and state what still requires a sample test. Missing information remains a stated uncertainty rather than an invented specification.