Dry Injection Filler, also known as a Dry Powder Injection Filling Machine or Vial Powder Filler, is a specialized aseptic packaging system designed to accurately fill sterilized dry powders into glass or suitable vials under controlled sterile conditions. These machines play a critical role in the pharmaceutical industry for products such as antibiotic powders, cephalosporins, and other injectable dry formulations that require high sterility, precise dosing, and long-term stability. Built to meet stringent cGMP, USFDA, and WHO guidelines, a modern Dry Injection Filler combines vacuum-pressure dosing technology with integrated stoppering to deliver consistent, contamination-free results.
The process begins with sterilized powder stored in a dedicated hopper. A pair of mechanical agitators continuously mixes the powder to maintain uniform bulk density and consistent flow characteristics. Below the hopper, a precision-engineered powder wheel featuring multiple ports (commonly twelve) rotates at a controlled speed with virtually no clearance. Each port contains a piston, and a vacuum plate positioned behind the wheel is held in firm contact by spring pressure. As the wheel turns, vacuum draws an exact volume of powder into each port. Fill volume is determined by the adjustable piston length, allowing manufacturers to achieve different dose sizes with high accuracy. Excess powder is cleanly removed by an adjustable doctor blade that can be fine-tuned from outside the machine without removing the hopper.
The powder remains securely held in the port by vacuum until the wheel indexes to the position directly above the vial. At that moment, a timed pulse of sterilized low-pressure compressed air or nitrogen gas gently flushes the powder into the container. This sequential, controlled ejection ensures accurate transfer with minimal dust generation or product loss. Immediately after filling, a vial separator organizes the containers on the conveyor and moves them to the stoppering station. Sterilized, siliconized rubber stoppers are oriented in a vibratory bowl and fed into a vertical chute. Each vial is firmly gripped between timing belts so it can pick up a stopper from the chute exit. The vial then passes between pressing rollers that securely seat the stopper for a tight, reliable seal. This integrated filling-and-stoppering sequence reduces handling steps, shortens the sterile zone, and supports higher overall line efficiency.
Key advantages of a Dry Injection Filler include superior sterility assurance through laminar airflow operation and SS316L contact parts suitable for autoclaving, filling accuracy typically within ±1–2%, reduced product wastage via “No Vial – No Fill” systems, and high production speeds suitable for both medium and large-scale batches. The hygienic design, tool-less adjustments, and easy-clean construction minimize downtime and cross-contamination risks. These machines also offer flexibility for different vial sizes and powder characteristics while maintaining gentle handling that preserves powder integrity.
For pharmaceutical manufacturers seeking reliable, compliant, and efficient sterile powder filling, a well-engineered Dry Injection Filler delivers measurable improvements in product quality, operational productivity, and regulatory confidence. Its combination of proven vacuum dosing technology, precise mechanical control, and integrated stoppering makes it an essential asset in modern injectable manufacturing lines.
The sterilized powder is held in the powder hopper, where a pair of mechanical agitators continuously mixes it to maintain consistent flow properties and uniform bulk density. Below the hopper, a powder wheel containing twelve ports rotates at a controlled, pre-set speed with virtually no clearance. Each port of the powder wheel is fitted with a piston, and a vacuum plate is positioned directly behind the wheel. Spring pressure keeps the vacuum plate in firm contact with the powder wheel, eliminating any gap. As the wheel rotates, vacuum draws a precise volume of powder into each port. The fill volume is determined by the length of the piston, allowing different fill sizes to be achieved. Any excess powder is scraped away by a doctor blade. These doctor blades can be adjusted from outside the machine without the need to remove the powder hopper.
The powder remains held in the port by vacuum as the wheel continues to index. When a filled port reaches the position directly above the container, a timed pulse of sterilized low-pressure compressed air (or nitrogen) is applied. This air sequentially ejects the powder from the port into the container, one dose at a time. Immediately after filling, the containers are separated on the conveyor by a vial separator and conveyed onward for the stoppering operation.Sterilized, siliconized rubber stoppers are held in a vibratory bowl. From there they are oriented and fed into a vertical chute, where they stack neatly. Each container is gripped firmly between a pair of timing belts so that it can pick up a rubber stopper from the exit end of the chute. The container then passes between two pressing rollers that firmly seat the stopper, ensuring a tight and secure fit.
Models | APF 12S | APF 12D |
Production Output | Up to 100 vials/minute | Up to 200 vials/minute |
Fill Volume | 50 mg. to 10grams | 50 mg. to 10 grams |
Vial Size | 5ml to 250ml | 5ml to 250ml |
Filling Accuracy | ± 2 – 3% in single dosing depending upon consistency and uniformity of bulk density of Injectable Powder | ± 2 – 3% in single dosing depending upon consistency and uniformity of bulk density of Injectable Powder |
Power Load | 3.5 H. P. | 4.5 H. P. |
Overall Dimension | 2600mm (L) X 1100mm (W) X 1800mm (H) approx. | 3000mm (L) X 1100mm (W) X 1800mm (H) approx. |
Net Weight | 500 kgs. approx. | 700 kgs. approx. |
Gross Weight | 750 kgs. approx. | 950 kgs. approx. |
* 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.
Most dry injection fillers use vacuum or servo-controlled powder dosing systems. Powder is drawn into precision metering chambers (powder wheels) under vacuum and then transferred into the vial using controlled air pressure. The machine synchronizes vial feeding, filling, stoppering, and sometimes capping in a continuous rotary or intermittent motion while maintaining sterility.
These machines are suitable for free-flowing and semi-free-flowing sterile powders, including antibiotics (e.g., ceftriaxone, ampicillin), hormones, and other injectable dry formulations. Advanced models with vibratory or specialized dosing systems can also handle cohesive or fine powders with consistent accuracy.
High-quality dry injection fillers achieve filling accuracy of ±1% to ±2%, depending on the powder characteristics, fill weight, and environmental conditions. Servo-driven and vacuum-based systems offer excellent repeatability, which is critical for meeting regulatory requirements.
Output varies by model and configuration. Semi-automatic or intermittent machines typically range from 30–60 vials per minute, while high-speed rotary systems can reach 100–300+ vials per minute. Actual speed depends on vial size, fill volume, powder type, and whether stoppering and capping are integrated.
Yes. Reputable dry injection fillers are designed to meet cGMP, USFDA, WHO, and other international standards. They feature SS316L contact parts, easy-to-clean designs, laminar airflow compatibility (Class 100), “No Vial – No Fill” systems, and options for IQ/OQ documentation to support validation
A standard powder filler is typically used for non-sterile applications (oral powders, dry syrups, food, etc.). A Dry Injection Filler is specifically engineered for aseptic environments, uses sterile dosing technology, includes rubber stoppering, and prioritizes contamination control—making it suitable for injectable products.
Yes. Most machines support a range of vial sizes (commonly 2 ml to 30 ml or larger) through change parts. Quick-change tooling allows relatively fast changeovers between different vial diameters and fill volumes while maintaining accuracy and sterility.
Routine maintenance includes cleaning and sterilization of contact parts, inspection of vacuum seals and powder wheels, lubrication of moving components, and calibration of dosing systems. Machines with modular designs and CIP/SIP-compatible options reduce downtime. Regular preventive maintenance ensures consistent performance and long service life.
Absolutely. These machines are commonly integrated with vial washing machines, depyrogenation tunnels, rubber stoppering units, aluminum capping machines, and inspection systems to form a complete sterile dry powder injectable line. Monoblock designs that combine filling, stoppering, and capping further improve efficiency and reduce contamination risks.
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Adinath International manufactures high-precision pharmaceutical packaging machinery and production plants, providing reliable, hygienic, and efficient solutions for global pharmaceutical industries.
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