Automatic Biological Indicator Filling & Sealing Machine
Advanced Ultra-Precision Micro-Dosing Solutions for Onion Skin Tubes (OST) and Crushable Glass Ampoules
In specialized pharmaceutical manufacturing, biotechnology, and sterile validation processes, precision and absolute sterility are non-negotiable. The Automatic Biological Indicator Filling & Sealing Machine from Harsiddh Unimach Pvt. Ltd. stands as an industry-leading solution engineered specifically for handling delicate, specialized glass containers. This versatile system seamlessly unifies the functionalities of an Onion Skin Tube (OST) filling machine and a crushable glass tube filling machine into a single, high-efficiency automated framework.
Designed to meet the stringent demands of global cleanroom operations, this machine provides accurate micro-dosing, hermetic flame sealing, and robust atmospheric protection. Whether your production involves biological sterilization indicators, specialized veterinary medicines, concentrated agro-insecticides, or sensitive chemical reagents, this CE-certified equipment delivers uncompromising accuracy and repeatable processing validation.
Versatile Media Processing: Onion Skin Tubes & Crushable Ampoules
Different industrial and medical applications require highly specific glass containment designs. The engineering architecture behind the Harsiddh Unimach Pvt. Ltd. system offers universal compatibility across specialized glass formats:
- Onion Skin Tube (OST) Processing: Handles thin-walled, specialized glass tubes with precision, ensuring gentle mechanical movement to eliminate breakage during high-speed indexing, filling, and sealing phases.
- Crushable Glass Tubes & Ampoules: Engineered to accurately process crushable indicator ampoules. These fragile components require precise thermal management during the sealing phase to maintain glass structural integrity until intent-of-use fracture.
- Broad Volume Capability: The equipment is highly adaptable, processing a diverse spectrum of glass containment sizes up to a 10ml capacity, with dynamic single-dose filling capabilities starting from an ultra-micro 0.1ml up to 10ml.
Step-by-Step Advanced Operational Workflow
Achieving reliable hermetic sealing and accurate dosing requires a meticulously synchronized, multi-stage automation process. The machine utilizes a streamlined linear or rotary workflow optimized for micro-volumes.
[Infeed Carousel / Tray] ➔ [Pre-Nitrogen Purging] ➔ [Precision Fluid Dosing] ➔ [Post-Nitrogen Flushing] ➔ [Pre-Heating & Flame Sealing] ➔ [Segregated Collection Tray]1. Container Infeed and Stabilization
Glass tubes or ampoules are loaded onto the automated infeed system. A customized single-motor main drive perfectly synchronizes all major unit movements, ensuring that the fragile glass containers move smoothly through the transport rack without friction or thermal stress.
2. Pre-Nitrogen Flushing
Prior to liquid introduction, the containers pass through an integrated pre-nitrogen flushing unit. By displacing ambient oxygen with high-purity nitrogen gas, the machine creates an inert environment within the tube, effectively protecting oxygen-sensitive biological media, cultures, or chemical formulations from oxidative degradation.
3. Volumetric or Peristaltic Micro-Dosing
Once positioned beneath the filling station, the machine utilizes high-precision dosing technology to dispense volumes ranging from 0.1ml to 10ml. Depending on your specific product characteristics, the system can be configured with:
- Volumetric Piston-Pump Systems: Ideal for highly consistent, repeatable mechanical dosing of standard fluids.
- Peristaltic Pump Systems: Perfect for biological indicators and sterile reagents. Because the fluid only contacts the pharmaceutical-grade silicone tubing, risk of cross-contamination is entirely eliminated, and clean-in-place (CIP) turnaround is minimized.
4. Post-Nitrogen Flushing
Immediately after fluid delivery and prior to entering the sealing zone, a post-nitrogen flushing mechanism drives out any residual air or vapor pockets trapped above the liquid line. This double-flushing sequence ensures an optimal, long-term inert head-space environment inside the sealed tube.
5. Advanced Pre-Heating & Hermetic Flame Sealing
To handle varying glass densities—especially thick-walled glass ampoules—the machine features an active pre-heating unit. This station gradually raises the glass temperature before it reaches the final sealing zone. Utilizing a controlled mixture of Oxygen and LPG (Liquid Petroleum Gas), the sealing station applies an even, high-temperature flame to melt the glass tip smoothly, forming a reliable, airtight, leak-proof hermetic seal.
6. Sloped Collection & Segregated Discharge
Once sealed, the finished tubes are transferred gently via a sloped delivery tray. This sleep tray mechanism ensures an organized, damage-free division and collection of filled and sealed glass tubes or crushable ampoules, preparing them for downstream inspection, sterilization validation, or final packaging.
Core Engineering Features & Technical Superiority
- Premium AISI 316L Stainless Steel Contact Parts: To comply with global regulatory expectations and prevent contamination, all parts that directly contact the filling material are constructed from elite-grade AISI 316L stainless steel. Non-contact structures are built from durable AISI 304.
- High-Yield Production Throughput: Operating smoothly at production speeds ranging from 10 to 100 glass tubes per minute, the machine enables manufacturers to scale up validation-level outputs efficiently without compromising accuracy.
- Universal Unified Drive Mechanism: Driven by a specialized single motor that harmonizes all internal indexing, pump movements, and rotation drives. This design minimizes mechanical complexity, significantly lowering maintenance requirements and power consumption.
- Minimal Format Changeover Parts: Designed with changeover optimization in mind. Transitioning between different ampoule sizes or changing from OSTs to crushable glass tubes requires minimal toolless swap parts, heavily reducing operational downtime.
Diverse Commercial & Industrial Applications
The extreme precision of the biological indicator filler sealer makes it a critical asset across multiple demanding sectors:
- Biological Indicators & Sterilization Validation: Used to fill and seal bacterial spore suspensions (such as Geobacillus stearothermophilus or Bacillus atrophaeus) into crushable ampoules for monitoring steam, ethylene oxide, or dry heat sterilization processes.
- Veterinary Pharmaceuticals: Excellent for packaging specialized single-dose liquid veterinary medications, sterile serums, and targeted animal vaccines.
- Agrochemicals & Insecticides: Ideal for micro-packaging high-potency agrochemical concentrates, chemical crop markers, and pest-control liquids that require completely sealed, tamper-evident glass housing.
- Specialty Chemicals & Lab Reagents: Suitable for packing air-sensitive laboratory standards, chemical indicators, diagnostic reagents, and volatile chemical compounds.
Strategic Commercial Advantages of Partnering with Harsiddh Unimach Pvt. Ltd.
- Global Compliance Ready: Every unit is manufactured to comply with strict CE certification standards and current Good Manufacturing Practices (cGMP), facilitating seamless validation and documentation procedures during facility audits.
- Minimized Glass Loss: Gentle mechanical handling, paired with intelligent thermal pre-heating, ensures that even the most fragile onion skin tubes are filled and sealed with near-zero breakage rates.
- Tailored Configurations: Harsiddh Unimach Pvt. Ltd. configures each system around your specific production goals—integrating customized filling pumps, specific gas manifold monitors, and optimized indexing rates to perfectly align with your plant’s standard operating procedures.
Technical Specification
| Model No. | HFS-30 OST / HFS-55 OST / HFS-4 OST (Suitable For Onion Skin Tubes / Crushable Ampoules / Biological Indicator) |
| No. Of Head | One / Two / Four Heads |
| Size Of Onion Skin Tubes / Crushable Ampoules / Biological Indicators | Dia. 6mm to 15mm Length – 55mm to 100mm Or as per customer size |
| Filling Capacity | From 0.5ml to 5ml in single dose |
| Filling Type | Peristaltic Pumps Type Filling |
| Filling accuracy | +1% |
| Contact Parts | Stainless Steel AISI 316L (For Filling Nozzles) |
| Filling Head | One / Two / Four |
| Sealing Nozzle | One / Two / Four |
| Output / Minute | 10 to 100 Tubes / Minute (Depend on models) |
| Require Gases For Sealing | LPG & Oxygen (Mixture) |
| Nitrogen Purging | Available (Pre & Post) |
| Pre Heating | Available |
| Power Require | 0.5/1 H.P., 220 Volts, 1 Phase, 50 Hz OR Customized |
| Over All Dimensions | Depend on model |
| Net Weight | Depend on model |
| Gross Weight (With Wooden Case) | Depend on model |
Modernize Your Micro-Liquid Packaging Line
When dealing with ultra-low dosing volumes and fragile glass envelopes, mechanical reliability is essential. The Automatic Biological Indicator Filling & Sealing Machine from Harsiddh Unimach Pvt. Ltd. provides the technology, safety controls, and material quality required to safeguard your products and scale your operations.
Optimize your sterile filling processes, secure your inert gas profiles, and achieve unmatched manufacturing precision. For comprehensive technical specifications, custom engineering consultations, or to request a detailed business quote, connect with our technical sales division today.
- Official Product Page: www.harsiddhunimach.com
- Technical Inquiries: info@harsiddhunimach.com
Frequently Asked Questions
How does the machine ensure high-precision filling for such small volumes?
Since Biological Indicators require very specific amounts of growth media, the machine is equipped with a Micro-Dosing Filling System (typically using high-precision Peristaltic Pumps or Valveless Ceramic Pistons). This ensures a filling accuracy of ±0.5% to 1%, which is critical for the consistency of the chemical reaction and the reliability of the sterilization test results.
Can the machine handle the fragile glass ampoules used in Biological Indicators?
Yes. The Harsiddh BI machine is engineered with a Gentle "Pick and Place" or specialized Vibratory Feeding system specifically designed for glass ampoules. The transport star-wheels and placement heads are lined with soft, medical-grade materials to prevent any micro-cracks or breakage of the spore-bearing ampoule during the insertion process into the outer plastic vial.
What type of sealing technology is used for the BI vials?
Depending on the specific BI design, the machine utilizes either Ultrasonic Sealing or Induction Heat Sealing. These "non-contact" sealing methods are preferred because they create a robust, leak-proof weld between the cap and the vial without the risk of thermal degradation of the bacterial spores or the growth media inside.
What are the key compliance and cleanroom features of this machine?
As this machine is used in the production of medical validation tools, it is built to the highest cGMP and ISO standards:
Material: Entirely constructed of SS 316L for contact parts and SS 304 for the main frame.
Sterile Operation: Designed for integration under a Laminar Air Flow (LAF) hood to maintain an ISO Class 5 environment during the filling and sealing process.
Data Logging: Equipped with a PLC and HMI system that provides "Audit Trails" and batch reporting, essential for quality assurance in pharmaceutical manufacturing.
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