Bag installation and raw-material addition
Check drive engagement and minimum working volume, then add water, powder and additive solutions in the defined order.
Biopharma · APPLICATION GUIDE
Single-Use Mixing Bags
Bags for dissolving powders and preparing media and buffers. Identify conditions that provide effective mixing while protecting the product.
Review selection pointsDiscuss this applicationFIELD APPLICATION & FLOW
See the application in its industrial setting.
Review product locations and fluid paths.
APPLICATION IN CONTEXT
- Water/raw-material additions
- Bag/impeller/support tote
- pH/conductivity/temperature
- Downstream filtration/supply
- Drive/record
Connections to review
- 01 → 02 Water/raw-material additions → Bag/impeller/support tote
- 02 → 04 Bag/impeller/support tote → Downstream filtration/supply
- 03 → 05 pH/conductivity/temperature → Drive/record
- 05 → 02 Mixing control
This example uses a magnetic-drive impeller. Minimum working volume and mixing performance are equipment- and fluid-specific.
A conceptual illustration created to explain equipment and application locations. It is not an actual product photograph, installation photograph or piping/wiring design.
Connection principles and operating/test methods
Mixing bags · Ingredient addition to mixing checks
Fluid
Scroll horizontally to see the complete flow.
The diagram shows liquid movement and process order. During mixing, check conductivity, pH, undissolved particles, and, when needed, sample uniformity.
These conceptual views explain flow direction. Actual piping, wiring and physical flow rates require a separate design.
01 — PROCESS
Where does each step fit?
Define the intended use and conditions to identify the required role of each item.
Dissolution and mixing verification
Adjust rotational conditions and temperature while checking conductivity, pH, undissolved particles and uniformity at different locations.
Draining and subsequent processing
Connect the required subsequent treatment or filtration, and check residual volume after draining, bubbles and product loss.
02 — SELECTION
What should be selected and verified?
Mixing-bag performance depends on the combination of its dedicated impeller, drive and support container. First define the properties of the powders and fluids, actual working volume, addition sequence and criteria for complete mixing.
Scroll horizontally to review all columns.
| Bag or assembly function | Item to review | Selection evidence |
|---|---|---|
| Dissolve powder uniformly | Addition, wetting and dispersion | Powder properties, addition rate and sequence, concentration and mixing time |
| Match the equipment and bag | Impeller and drive | Equipment model, bag shape, magnetic coupling or drive mechanism |
| Operate from small to large volumes | Working volume range | Minimum fluid volume, liquid level, impeller submergence and testing at each scale |
| Determine when mixing is complete | Process sensors and samples | Conductivity, pH and temperature, uniformity across sample locations and undissolved particles |
| Protect sensitive proteins | Shear and bubble management | Mixing intensity, foam, changes in aggregation or activity, and recovery |
Volume or film name alone is insufficient. Review the actual fluid, contact conditions, equipment compatibility and supplier evidence.
03 — OPERATING CHECKS
Use operating data to identify improvements.
Do not rely on stable conductivity alone
Fine undissolved particles can remain even when conductivity has stabilized. Combine sampling appropriate to the actual formulation with checks of appearance and concentration.
Do not assume equal rpm gives equal mixing performance
Changes in scale, impeller geometry and liquid level change the flow pattern. Compare mixing time, uniformity and product quality at production scale.
Check bubbles and measurement locations together
Strong vortices and bubbles around sensors can affect readings. Review sensor location, mixing conditions and sample verification results together.
04 — QUESTIONS
Frequently asked questions
Can a mixer be inserted into a storage bag?
Do not add an arbitrary mixer to a standard storage bag. Review a mixing system designed for drive engagement, prevention of bag damage and maintenance of the sterile boundary.
Does a mixing bag eliminate the need for sterilizing filtration?
Mixing and sterilizing filtration serve different purposes. Define filtration and any other required treatments separately according to the microbial requirements of the raw materials and subsequent process.
05 — APPLICATION REVIEW
Prepare the conditions for a technical discussion.
These details help narrow the configuration and the evidence to review.
- Formulation, powder types and target concentration
- Minimum/maximum working volume and viscosity
- Current mixer model and bag product code
- Criteria for mixing time, conductivity, pH and temperature
- Sensitivity to bubbles and shear, and subsequent filtration conditions
Product types and confirmed supply scope are different.
This page explains selection considerations by application. It is not a commitment to supply every type, size or manufacturer’s product shown. Share the manufacturer and product code, or your configuration requirements, to discuss supply availability and outstanding checks.
- Existing product code
- Required volume, ports and tubing
- Equipment and support vessel
- Expected quantity and requested timing
Product-type and selection guide · Available configurations: confirm individually
Ask about supply for this configuration