Nominal cartridge format
Used to define the physical project starting point. Final drawings and available configurations must be confirmed for the ordered system.
4 mL dual chamber cartridge projects
The 4 mL reference describes the cartridge’s nominal total format, not an automatically delivered 4 mL drug volume. Fill ratio, bypass location, stopper geometry, residual volume and the matched pen interface must be defined before compatibility, pricing or delivered volume can be confirmed.
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First technical question
What are the intended dry-component and diluent volumes? The answer influences chamber geometry, reconstitution behavior and the cartridge-to-pen screening path.
What 4 mL does and does not mean
A nominal cartridge format is only one input. It should not be used as a shortcut for reconstituted volume, maximum single delivery or dose count.
Reconstituted volume
Depends primarily on the diluent chamber, formulation behavior and residual considerations. It requires project-specific confirmation.
Maximum delivery
Set by the selected pen mechanism and intended dose program, not simply by the cartridge’s nominal volume.
Cartridge information required for screening
| Input | Why it matters | Who normally confirms it |
|---|---|---|
| Dry component and diluent volumes | Influence chamber allocation and bypass position | Pharmaceutical formulation and container teams |
| Target reconstituted volume | Supports dose and residual-volume review | Drug sponsor |
| Stopper and interface geometry | Influence travel, sealing and device engagement | Container and device teams |
| Target pen and needle | Supports system-level dimensional screening | Device project team |
| Destination market | Shapes evidence and documentation expectations | Regulatory and procurement teams |
Compatibility boundary
REVADUO can coordinate cartridge and pen sourcing inputs, but this page does not establish formulation compatibility, container-closure integrity, reconstitution performance or regulatory acceptability.
- Request drawings before assuming physical fit.
- Confirm fill ratio before tooling or firm quotation.
- Plan formulation and container testing with qualified specialists.
Connect the cartridge to the full system
Start with the fill ratio brief
Share intended chamber volumes, reconstituted volume, target pen, market and quantity.