You can transfer pharmaceutical powders and granules fast, safely, and mess-free, using a vacuum conveying system. It is a technology that many pharmaceutical systems have been adopting.
However, before you buy and install these vacuum systems, it is important to understand the working principle, configuration and classification criteria, just to mention a few.
What is a Vacuum Conveying System?
A vacuum conveying system is a fully enclosed pipeline in which dry powders, granules or similar materials are conveyed using suction pressure. This prevents contamination of your product and makes it flow easily through various manufacturing processes.
Types of Pharmaceutical Vacuum Conveyors
· Batch System
A batch system moves a fixed quantity of material at a time. The system is halted after one batch has reached the destination, thus allowing you to offload the material before the next batch is on the move.
This design comes in handy where accuracy counts. It is commonly applied where the pharmaceutical ingredient is expensive or sensitive since it reduces the wastage of products.
· Continuous System
A continuous system does not stop in between transfers. The flow of material is continuous, flowing directly into the next process in a pipeline. This design allows continuous production and increased throughput.
· Dilute Phase Conveying System
A dilute phase conveying system is the conveying system that transports lightweight powders through high velocity air over long distances. There is little or no clogging in the pipeline because the powder particles remain suspended. This method is effective with free flowing powders and allows engineers to change the route of pipes around obstacles.
· Dense Phase Conveying System
A dense phase conveying system transports your heavier or fragile materials at low velocities. The material moves in slugs or layers, which decreases wear and breakage. This is a common practice of preserving sensitive pharmaceutical products.
Pharma Machines to Integrate with Vacuum Conveying Systems
· Bin Blenders
A bin blender is used to mix powders in order to make them homogeneous before the production of tablets or capsules. Raw materials are loaded into the blender by a vacuum conveyor without manual scooping. This reduces the chances of contamination, enhances safety of the workers, and maintains a precise ratio of ingredients.
· Granulators
A granulator is used to break big lumps of powder into granules. Powders or pre-blended mixtures are fed into the hopper by a vacuum conveyor in a controlled and steady flow. Manual handling is reduced by automation between the granulator and the conveyor.
· Pharma Mixers
Pharma mixers are used to mix various powders and excipients into a homogeneous blend. Materials are fed into the mixing chamber by a vacuum conveyor, minimising spillage and dust. This accelerates the work and complies with the hygiene standards that are demanded during the pharmaceutical production.
· Powder Packaging Machines
Powder packaging machines fill sachets, bottles or pouches with precise doses. The machine is fed by a vacuum conveyor in order to avoid any exposure of the powder to open air. This keeps the dosing correct and preserves the physical and chemical integrity of the product.
How Vacuum Conveyors Work
Vacuum conveyors take advantage of differences in pressure to transfer materials. A vacuum pump is used to provide suction to draw material through the pipeline. This pressure drop transports powders out of containers, bins or hoppers to the receiving unit.
The first step is the initiation of the vacuum pump by the control unit of the system. The material is forced into the pipeline and flows to the separator or receiver. Cyclone separators remove air in the material such that the powder settles before unloading.
Discharge valves open when the material reaches the receiver to release the material into the next processing stage. To stop backflow, airflow is momentarily stopped when unloading. This cycle is repeated until the necessary transfer is accomplished.
Filters are used during the process to ensure that the dust does not escape into the air. They also prevent contamination of the vacuum pump. Modern systems have sensors which check the efficiency and safety of the airflow, pressure, and load levels.
Components of Vacuum Material Transfer System
· Cyclone Separator
A device that uses centrifugal force to propel materials against a wall, and product to the middle. This ensures the products and dust remain trapped inside, preserves the filters, prevents escape of dust, and allows downstream machines to operate efficiently and remain clean.
· Vacuum System
A system of valves and pumps that produces a low pressure in the pipes, which draws materials through the pipes without clogging or sticking. This allows products to move rapidly and at regular intervals, thus you do not need to carry them directly and the risk of contaminants coming into contact with the powder is minimised.
· Control System
A computer or controller that monitors the pressure, airflow and transfer timing to ensure that the machine can only move the precise quantity of material required and at the exact speed. This maintains a smooth flow of the product and avoids mistakes, which becomes significant when the system is interacting with other machinery in the pharmaceutical manufacturing process.
· Pipe Network
It is a closed system of pipes between the source and destination where materials are carried without leakage or spillage. The pipes may be curved or positioned at various places to suit irregular space requirements within a manufacturing plant.
· Other Support Parts
These parts are filters, discharge valves, sensors, and seals. They all work together to ensure a smooth running of the system, protection of the machinery, and protection against contamination.
Vacuum Conveyor System Design Calculation Requirements
Before you buy a vacuum conveying system for your pharmaceutical material processing, there are basic calculations that will help you estimate efficiency. Among the key variables that play an integral role here include:
· Evaluate Material Properties
Start with your powder’s flow traits. Examine its bulk density, particle density, size distribution, shape and moisture content. Such characteristics determine the pick-up speed, erosion potential, wear and tear, and the most secure method to transport it.
· State Conveying Mode – Dense or Dilute Phase
Choose dilute phase when your material stays suspended at moderate to high air velocities. Typical design velocities sit above saltation, often 10 – 20 m/s for fine powders. Cohesive powders need the higher end.
Choose dense phase for fragile, heavy, or abrasive products. It runs slower to cut attrition, often 3–12 m/s, with higher pressure and higher loadings.
· Pressure and Air Flow Calculations
Size air velocity from the carrying requirement. Use V = Q / A.
Then get air mass flow m_air = rho x Q. Compute air density from ideal gas rho = P / (R x T). Use absolute pressure at conveying conditions.
Calculate Darcy Weisbach gas-only friction loss.
ΔP air = f x (L /D) x (rho x V 2/ 2)
Apply f = 0.3164 / Re^0.25 to smooth, turbulent lines where Re = rho x V x D / μ.
Add bend loss: ΔP_bend = N_b x (1 + B x μ_s) x (rho x V² / 2) for long-radius elbows, with B ≈ 0.5.
Add lift: ΔP_lift = ρ_p x (1 – ε) x g x ΔH. Here μ_s is solids loading ratio, ε is voidage.
· Consider System Design
Lay out straight runs, vertical lifts, and elbow count. Every extra bend adds gas and re-acceleration losses. Long verticals add static head for both gas and solids.
· Equation for Estimate Design Configuration
You should then define solids loading ratio to gauge regime and pump sizing:
μ_s = m_solids / m_air
Low values indicate dilute operation; higher values push toward dense behavior.
Sum total drop:
ΔP_total ≈ ΔP_air + ΔP_bends + ΔP_lift + ΔP_accel + ΔP_equipment
To make quick estimates, omit ΔP_accel when the pick-up sections are small, and provide a design margin. Next, verify the pick-up speed against your material’s goals.
How to Choose Vacuum Conveying System
With the above calculations, you can move to the next step where you should choose the vacuum conveying system. Now, here are key variables to consider:
· Material Characteristics
There are four things you must know about your material:
- Particle size
- Bulk density
- Abrasiveness
- Water content
These four factors can be verified to select a system that maintains the flow of material without clogging and damage. When you combine the specifications of the system with the characteristics of your material, you obtain smooth, efficient motion without damage to the product.
· Transfer Capacity
You must be aware of the quantity of material which should be processed within an hour. The proper system size prevents an overly high rate and leads to less downtime. That way, production remains free-flowing and does not consume additional energy or stress your equipment during peak periods.
· Conveying Distance
Calculate the horizontal and vertical distance between the discharge point and the pickup. The greater or longer the path, the greater the vacuum power, the larger the pipes, and the superior the airflow design must be to maintain a steady material velocity and prevent product loss.
· System Type
Depending on the sensitivity and flowability of the product, you should choose between a dilute or dense phase conveying. Dilute phase is good with free flowing non-fragile products and dense phase is used with fragile products because it applies a low velocity and high pressure during transfer.
· Hygiene Requirements
In food and pharmaceutical industries, you should select systems that have simple clean designs, stainless steel, and sealed pipelines. This guarantees that the hygiene standards are met and contamination is avoided as well as makes cleaning between batches of production easy.
· Energy Efficiency
You should choose systems that are optimized on blower sizing, variable frequency drives, and low pressure losses. Energy-efficient designs save on operational cost, minimize environmental impact, and offer long-term savings without impacting on the performance of conveying.
· Safety Features
You should seek overload protection, explosion proof designs, and dust control mechanisms. Safety-oriented systems safeguard operators, equipment, and facilities as well as compliance with applicable workplace safety and environmental laws.
Advantages of Vacuum Conveying in Pharma
- Gets rid of dust emissions and enhances cleanliness.
- Lessens contamination risk by closed transfer.
- Improves the safety of workers through the minimization of manual handling.
- Increases productivity through faster and automated movement of materials.
Applications in Pharmaceutical Industry
As earlier indicated, we have optimized this vacuum system for pharmaceutical industry. Therefore, when using this product conveying system, you can achieve:
- Transferring powders from drum to mixers.
- Feeding of blended material to tablet presses.
- Filling the loading capsule filling machines with exact amounts of powder.
Why Choose SaintyCo Vacuum Conveyor System
SaintyCo offers hygienic, efficient, and fully automated vacuum conveyors meeting pharmaceutical standards. Our systems can be integrated in your pharmaceutical production line. Additionally, they may also allow for scalability.
In every stage, SaintyCo adheres to strict manufacturing and testing criteria. All our vacuum conveyor systems are made from food-grade stainless steel and complies with the CGMP requirements.Talk to our sales team today for a complete turnkey solution for your pharmaceutical industry.
Conclusion
Vacuum conveying system provides clean, safe, and efficient transfer of materials in pharmaceutical manufacturing. With every machine, you get fully optimized material transfer solution for a wide range of pharmaceutical products.
FAQs
1. What is the function of vacuum conveyor?
It conveys powders or granules by suction pressure in closed pipelines.
2. What are the limitations of vacuum conveyor system?
It could have decreased effectiveness with the sticky or high-moisture materials.
3. How much do pharmaceutical vacuum conveyor cost?
The prices depend on the capacity, design, and features.
4. What is the recommended cleaning protocol for vacuum conveying system?
You should refer to the manufacturer’s instructions for how to disassemble, clean and sanitize any component.
