Sterile Powder Filling Machine

A Sterile Powder Filling Machine is specialized equipment designed for the precise, contamination-free filling of powdered substances—typically pharmaceuticals like antibiotics, vaccines, or high-potency APIs—into sterile containers such as glass vials, syringes, or cartridges. Sterile Powder Filling Machine are essential in aseptic processing environments to ensure product sterility, accuracy, and compliance with cGMP (current Good Manufacturing Practices) standards. They are widely used in the pharmaceutical, biotechnology, and sometimes food industries for injectable or inhalation products where stability in liquid form is not feasible.

Sterile Powder Filling Machine Video

The core process involves:

• Sterile powder handling: Powder is stored in a hopper, agitated for uniform density, and dosed using vacuum-assisted wheels or gravimetric systems.

• Filling: Precise volumes (e.g., 50mg to 1500mg) are transferred into containers under laminar airflow or isolator conditions to prevent microbial contamination.

• Stoppering/Capping: Often integrated, with automatic insertion of rubber stoppers and sealing.

• Sterilization: Contact parts are autoclavable, and systems support VHP (Vaporized Hydrogen Peroxide) or dry heat depyrogenation.

Sterile Powder Filling Machine minimize waste, ensure fill accuracy (±1%), and support high speeds while maintaining a Class 100 sterile environment.

How Does It Work?

Most sterile powder fillers use a vacuum/pressure or gravimetric dosing system:

1. Powder Preparation: Sterilized powder is loaded into a hopper with mechanical agitators to maintain consistent bulk density.

2. Dosing: A rotating powder wheel with ports sucks in powder via vacuum. Excess is doctored off, and the dose is released using compressed sterile air (or nitrogen) into the container.

3. Transport and Control: Vials move via servo-driven systems; in-process weighing (100% IPC) verifies accuracy and rejects off-spec fills.

4. Closing: Stoppers are inserted, and caps are sealed, often in a monobloc (single-platform) setup for efficiency.

Advanced models like isolator-integrated systems provide full barrier protection, reducing human intervention.

Key Features and Considerations

When selecting a machine, focus on:

• Powder Properties: Handles fine, hygroscopic, or high-potency powders with varying flowability.

• Output and Accuracy: From lab-scale (20 vials/min) to high-speed (300+ vials/min), with ±0.5-1% fill precision.

• Sterility Assurance: Enclosed pathways, easy-to-sterilize SS316L parts, and compatibility with RABS or isolators.

• Flexibility: Adjustable for vial sizes (2-50ml) and multi-dose capabilities.

Salient Features of Sterile Powder Filler Machine

• Compact cGMP model.

• “No Vial, No Filling” system eliminates wastage of costly powder.

• Multiple Dosing System.

• High Volumetric Filling Accuracy of ±2% of uniform density Injectable powder can be ensured by setting the depth of piston in the port of powder wheel.

• Built-in Rubber Stoppering Unit saves lot of space in the Sterile Area & reduces the length of Laminar Flow.

• Individual drive for the filling & sealing to match the speed of filling & sealing.

• All motors are provided with appropriate contractors and relays for the protection against any overload or jamming.

• Safety clutch system to avoid Vial breakage.

• Variable AC Frequency Drive for speed adjustment.

• All contact parts are easily removable for mandatory Autoclaving/ Sterilization.

• Digital counter for counting production output.

Working Principle of Vial Powder Filler

The sterilized powder is stored in powder hopper is agitated by pair of mechanical agitators for maintaining consistency and uniform bulk density. The powder wheel having eight ports rotates at the pre determined speed below the powder hopper with practically no clearance. Powder wheel consist of Piston in each port and behind the powder wheel vacuum plate is provided there is no clearance between powder wheel and vacuum plate due to back spring pressure. Precise volume of powder is sucked in to the port of powder wheel during vacuum according to the piston length different fill size can be achieved. The excess powder is doctored off by a doctor blade. Doctor blades can be adjusted from outside also without removing powder hopper. When powder wheel indexes further and remain in the port due to the vacuum till it reaches just vertically above the container. The time dose of Compressed air (Nitrogen Gas), sterilized low pressure air sequentially flushes out powder from the port of powder wheel in to the container one by one. The filled containers are immediately separated on the conveyor by vial separator and moves further for stoppering operation. (Different grooves separator can be used which depends on the container diameter or multiple dosing systems). The sterilized, siliconised, rubber stoppers stored in the vibrator bowl moves to vibratory bowl and stacked vertically in the rubber stopper chute. The container is hold firmly between pair or timing belt to pickup rubber stopper from exit end of the chute. Further the container is passed between two pressing roller for tight fit fixing of rubber stopper.

Technical Specification of Sterile Powder Filling Machine

* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.