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In previous blog posts, we shared many tips on choosing the right oil press Và extracting more oil from seeds. Afterwards, many customers asked us, “How should the oil be stored after pressing?” That’s a great question!
For branded processing companies, automated filling equipment is essential. This machine can cleanly and accurately fill oil into bottles, ensuring that the oil does not spill or go to waste. We’ve also shared how to press common edible oils such as olive oil, peanut oil, shea butter, and sesame oil in our previous blog posts. For these common medium-viscosity edible oils, you can choose either a piston filler or a gear pump filler. Both machines are well-suited for the medium viscosity characteristics of common edible oils. If you have questions about choosing the right filling machine for your current production needs, visit our blog for more information.
Here, we’ll focus on another aspect that many people are curious about—what does a complete edible oil bottling line look like? How does it actually work? Many friends have asked us these questions. Now, let me explain the complete process of how oil is transported from storage tanks to bottles.
What Machines are Included In a Complete Edible Oil Filling Production Line?
Last month, one of my Malaysian customers, Judy, who was buying a rapeseed máy ép dầu asked me a new question: “What machines do I need for a full edible oil filling machine line, and what do they all do?” After solving the problems of edible oil pressing and filtration, the next step—how to fill and pack the oil—came right on time. During our chat, I suggested he use a Vacuum Filling Machine. This type of filling machine removes the air during filling and uses vacuum pressure to pull the oil into the bottle. For those who want their oil to stay fresh longer and have professional packaging, a complete bottling line is the perfect choice. This not only increases filling speed and saves labor costs, but also improves edible oil hygiene and packaging consistency, just like Judy’s rapeseed oil business.
Now, let’s talk about what a complete edible oil filling production line really includes. Normally, it has a bottle blowing machine, a bottle unscrambler, a bottle washer, a filling machine, a capping machine, and a labeling machine. These are the main steps that take the oil from the tank to the bottle.
But that’s not all — a modern oil filling machine line also includes a coding machine for printing dates and batch numbers, a cartoning machine for secondary packaging, inspection equipment to check quality, a conveyor system to move bottles between machines, and finally a palletizer that stacks finished boxes neatly for delivery. Together, these machines make the process fast, clean, and safe — helping you build a smart and professional edible oil business.
How Does the Edible Oil Filling Process Work?
Now that we have a basic idea of what machines are included in an oil filling production line, next I’ll take you on a closer look at how each piece of equipment actually works in the process. Step by step, we’ll go through how the whole edible oil filling line operates. After this detailed look, I believe you’ll have a deeper understanding of how our GQ-Agri team works — and how we can help your business grow.
- Bottle Unscrambling.
The bottle unscrambler helps put all the empty bottles in order before they move on the line. It makes sure the bottles stand straight and go one by one. Without this step, bottles could fall, get stuck, or turn the wrong way. This machine can use a rotating table, tracks, or robotic arms. The speed must match the rest of the line so everything runs smoothly. - Bottle Washing.
The bottle washer cleans the inside and outside of bottles before filling, removing dust and tiny dirt. Clean bottles are super important for making safe and healthy cooking oil. Some machines also support hot water or ultraviolet sterilization. Here, there is a very important point – nitrogen flushing. Its main function is to replace oxygen, prevent oxidation, and extend the shelf life of cooking oil. It is often used in some companies that produce high-quality oils. - Drying
After washing, the bottles go through the drying process. The drying tunnel blows hot air to remove any leftover water and keep the bottles clean and dry. If water stays inside, it can make the oil cloudy or spoil faster. The air temperature must be controlled carefully to protect the bottles and oil quality. - Filling
This is the heart of the whole line. The filling machine puts the oil into bottles in a clean and exact way. Different types of filling machines—like gravity, piston, pump, overflow, or vacuum—work for different kinds of oil. Our GQ-Agri team offers many kinds that meet food safety standards and can help save up to 70% on labor costs. If you are interested in filling machine types, you can visit our corresponding blog to learn about filling machines with different pump types and filling mechanisms. - Capping
After filling, the bottles are closed tightly to stop oil from leaking or going bad. The more common ones now are screw capping machines, press capping machines, and push capping machines. In this step, we need to pay attention to: the capping must be just right, neither too tight nor too loose. Modern cappers can even spot missing or crooked caps and remove them automatically. - Nhãn hiệu
Next comes labeling. The machine puts labels on the bottles with the brand name, product details, barcodes, or nutrition info. In this step, we need to make sure the labels are flat, smooth, and clean. Good-quality labels make our products look neat and professional. - Coding
The coding machine prints the production date or batch number on the bottle or label. This helps track production and make sure customers know the shelf life. - Inspection
Before shipping, every bottle goes through quality checking. Machines test the weight, look for leaks, check the seal, and even inspect labels using cameras. Defective bottles are removed automatically. This step keeps every bottle safe and up to standard. - Conveying
The conveyor system connects all the machines. It moves bottles between each step quickly and safely. Smooth transport helps the whole line run efficiently without delays. - Packaging and Palletizing
Finally, we box and bag the oil bottles and stack them on pallets. Automatic palletizers then automatically stack the different products onto the pallets in a fixed order. For high-volume lines, a robotic palletizer and wrapper automate the final packaging stage. The number of products and the number of stacking layers can be set, making it easy for forklifts to transport fully loaded pallets into the warehouse. Well-packaged oil ensures safety and availability.
Each part of the line plays a key role — working together to make sure every bottle of oil is clean, safe, and looks great for your customers.
The Core Machine of the Bottling Process—Filling Machine.:
Among all the equipment we’ve discussed, your filling machine is where precision meets profitability. I’ve seen too many operations bottleneck at this critical stage due to poor equipment choices. That’s why our filling machines feature high-precision pump systems and filling nozzles engineered for accuracy and consistency. Whether you’re starting with semi-automatic units for flexible small-batch production or scaling up with fully automatic systems for high-volume operations, the right filling technology ensures minimal waste and maximum output. Let me help you match filling capacity to your actual production needs and growth plans.
How to Configure an Edible Oil Filling Line Based on Business Needs?
How should I configure an edible oil filling line for my factory? With so many edible oil canning machines available on the market, I often see online comments from people struggling with their choices. Once, I had a customer who bought our spiral oil press machine not long ago. He talked to me about growing his factory business recently. He’s currently a small to medium-sized factory, but as his business grows, he urgently needs a canning line： “How can I choose？”.
Before considering configuring an edible oil filling line, you must first consider and evaluate your business needs. Such as: production volume, oil viscosity, and container type. I have a customer ever rushed in before figuring this out; in the end, the production line has a lot of problems. Next, follow me. We need to choose the right level of automation (semi-automatic or fully automatic) and filling technology (e.g., volumetric, gravimetric, or vacuum). This way, you can tailor your selection to your plant’s production capacity and the required oil filling accuracy.
Now, let’s dig deeper into the key factors and see which machines fit each situation best. If you hurry to choose, our GQ-Agri team provides reliable filling machines and custom filling lines for producers of all sizes. Contact the GQ-Agri team, and perhaps we can provide you with some valuable expert analysis during your purchasing process.
- Production Scale and Output Needs.
First, you need to think about your production size. The filling head of the filling machine, the driving efficiency of the filling pump body, the speed of the conveyor belt, and other components determine the production efficiency of the filling line. I usually ask my clients, Judy, “How much oil do you want to fill per hour or per day?”
For example, a small local brand that fills about 2,000 bottles a day usually needs something simple and flexible. A semi-automatic piston filling machine works great — it’s affordable and easy to manage. But a big factory that runs all day and supplies supermarkets needs a fully automatic system to keep up with high output. In that case, a fully automatic rotary filling line with conveyors for filling, capping, and labeling is the best choice.
Actually, small producers care more about the flexibility, in the meantime large factories focus on automation and consistency. Before choosing your machine, make sure you really understand your production size and goals — that’s the first and most important step.
- Oil Type and Filling Technology.
Edible oils of different viscosities have different oil flow characteristics, which mainly affect the accuracy of the filling machine. Light oils like sunflower or corn oil flow easily, while thick oils like olive or sesame oil move slowly and need stronger pumps.
For example, one of our customers, John in Turkey, sells olive oil, which is thick and easy to oxidize. We suggested a vacuum filling machine with an air-removal system to keep the oil fresh and clear.
Another customer, Maddy in Nigeria, fills a large amount of vegetable oil. For him, we recommended a gravity filling machine with 12 filling heads — it’s fast and easy to maintain.
Generally speaking, we categorize canned liquids into three categories. For example, we use edible oil as an example:
Low-viscosity oils → Gravity fillers or pump fillers (fast and simple).
Medium-viscosity oils → Piston or gear pump fillers (accurate and stable).
High-viscosity or premium oils → Vacuum or overflow fillers (better accuracy and cleaner look). - Bottle Type and Packaging Size.
The shape and size of the packaging container will also affect the filling machine options. A small edible oil brand may fill 250ml glass bottles for retail shops, while another factory may use 5L or 20L PET jugs for restaurant or industrial customers. For a customer, Ken in Kenya, we customized one filling line that could handle both 1L and 5L bottles using a multi-head Piston Pump Filling Machine with an adjustable clamping system.
This helped them serve both the supermarket and wholesale market without buying two machines. Machines with adjustable bottle holders and volumetric or overflow fillers are ideal if you need to change bottle shapes often — they save time and reduce changeover costs.
Another point to note: When filling bottles under 250ml (typically essential oils or cosmetics), filler accuracy is particularly critical. Even small deviations can result in inconsistent products. At this time, the precise filling head and PLC control in the filling machine are particularly important. - Hygiene Standards and Cleaning Function.
During the edible oil filling process, if the parts of the equipment that come into contact with the oil are not designed to be sanitary and not cleaned thoroughly, impurities can easily be introduced, affecting the quality and shelf life of the oil.
Jeddy in Malaysia makes high-end coconut oil, and they needed to follow strict food safety rules. We designed a stainless-steel (SS316) piston filler with a CIP/SIP automatic cleaning system and no-drip nozzles. This kept their line super clean and reduced manual cleaning time.
So, if your factory cares about hygiene, choose machines made of food-grade stainless steel, with no-drip design and automatic cleaning systems — this helps keep your line safe and clean for a long time.
Finally, don’t forget to consider your factory’s production capacity and output requirements, oil viscosity, desired packaging specifications, budget, and desired level of automation. These are all factors to consider before deciding on a filling line. I think if you have sufficient budget at the beginning, starting the entire project will not be a problem.
Every business is different. Small start-ups care about flexibility, big producers focus on automation, and high-end oil brands need strict cleanliness. Ask yourself: what’s your production scale, oil type, packaging style, automation goal, and hygiene standard? Once you know these, you’ll be ready to build the best edible oil filling line for your business.
And if all of this sounds too complicated — don’t worry! You can work directly with GQ-Agri. We offer all kinds of machines — gravity fillers, piston fillers, overflow fillers, vacuum fillers, and pump fillers — and with over 15 years of experience, we truly understand your challenges. Contact the GQ-Agri team today — let’s start by building a smooth, reliable system to help your production grow!
How to Ensure Quality Control in the Edible Oil Filling Process?
Research surveys show， the global cooking oil market size was USD 204.55 billion in 2023 and is projected to grow from USD 218.36 billion in 2024 to USD 369.20 billion in 2032, growing at a CAGR of 6.79% over the forecast period (2024-2032). As society develops, more and more people care about food safety. The truth is, making sure the oil is high-quality on a filling line takes several important steps. These steps can help keep everything clean, accurate, and safe during the whole production process. What should we pay attention to, and how to make sure everything stays top quality?
1. Food-Grade Stainless Steel Construction.
How to make sure cooking oil stays clean and safe？ We typically use food-grade stainless steel such as SS304 or SS316 when manufacturing filling equipment. These materials don’t rust, are easy to clean, and can help stop germs or dirt from getting into the oil. Therefore, based on our past experience, customers typically prefer a food-grade stainless steel filling machine, which ensures the purity and safety of their edible oil.
2. Automated CIP/SIP Cleaning System.
Modern edible oil filling lines should be equipped with CIP (clean-in-place) and SIP (sterilization-in-place) systems. Both systems are core features of modern filling lines. They automatically circulate cleaning and disinfectant solutions, allowing for complete cleaning and sterilization of the entire line without disassembling the equipment. The key benefits of a CIP system are huge. It reduces downtime and labor costs, ensures consistent and repeatable cleaning results, improves food safety by minimizing contamination risk, and conserves water and cleaning agents.
3. Precise Filling Volume Control.
Accuracy is key to every edible oil production line, typically influenced by the filling machine’s operating principle, filling head accuracy, and filling pressure precision.A medium-sized rapeseed oil plant that our GQ-Agri team previously worked with reduced its filling tolerance per ton of oil from ±10ml to ±2ml after upgrading to a pump filling line, saving over $10,000 in raw material costs per month. So what methods are there to ensure accurate filling?
- Gravimetric filling: Uses load cells to deliver precise quantities, ideal for high-value oils.
- Volumetric filling: Accurately measures liquid volume to ensure a stable liquid level, particularly suitable for lightweight oils.
- Vacuum or pump filling systems: Adjust the flow rate based on the oil’s viscosity to reduce air bubbles and oxidation.
- PLC control: The density and viscosity of edible oil require high filling accuracy. It is recommended to choose a model with PLC control or a weighing system.
4. Seal Integrity and Leak Testing.
A tight seal is super important to keep cooking oil fresh and to stop leaks or contamination. If the bottle mouth is resealed after opening, the oxidation rate of the edible oil can be effectively reduced. To put it another way—if the bottle isn’t sealed properly, the oil can easily spoil, not to mention it might leak everywhere.
That’s why most factories run regular seal strength tests and use tools like the Fine-Tek leak tester to make sure no air or oil can escape. If every bottle on your line passes the test, stays fresh for months, and reaches your customers in perfect condition. Regular seal checks don’t just protect your product — they protect your brand’s reputation and show your buyers that your oil is truly premium quality.
5. Production Environment and Workflow Hygiene.
The production area must be kept clean, and the equipment layout must be reasonable to reduce the risk of cross-contamination. Keeping the filling area clean is one of those simple things that many factories forget — but it makes all the difference. One of our clients once told us that during every production meeting, they always ask, “Have we cleaned the line this week? Are we keeping the temperature and humidity stable?” Small habits like these prevent product spoilage and costly filling mistakes. Using standard bottles and doing regular equipment check-ups also helps keep production smooth, accurate, and worry-free — the kind of consistency every successful brand needs.
6. Employee Training and Food Safety Awareness.
Did you train your factory team today? A skilled and well-trained team is the foundation of consistent product quality. Many best factories don’t just rely on machines — the bosses also invest in their employees. Such as regular training on food safety, hygiene standards, and equipment care, this can help build a strong sense of responsibility and quality awareness among workers.
Choose a smarter way to earn your customers’ trust — start with your people. When your team knows exactly how to handle every step with care, you can reduce contamination risks and make sure every bottle of oil that leaves your factory is clean, safe, and premium in quality — the kind of product that keeps your brand shining.
Through the above detailed introduction, I believe you must now have a certain understanding of the quality control in the edible oil canning process. Take action now. Whether you are a small manufacturer looking to cooperate with a large and reliable supplier, or you are upgrading your own factory scale, these can be very helpful to you.
How to evaluate and choose a reliable oil filling line supplier?
Our GQ-Agri team frequently collaborates with agricultural manufacturers, providing them with a range of equipment, including peanut oil presses, rapeseed oil presses, and vacuum fillers. So, if I were to discuss how to choose a reliable edible oil filling production line supplier, I’d be quite knowledgeable. I will analyze from the perspective of procurement, including professional experience, export cases, support for customization, and after-sales guarantee, to help you make the right choice when selecting a filling equipment supplier.
- Technical Experience and Know-How.
MDPI academic research points out that in the edible oil industry, technical experience, delivery capabilities, and quantitative and qualitative evaluations are key to supplier selection. When choosing an edible oil filling line supplier, the first thing to check is their technical experience and how long they’ve been in this industry.
Also, find out if they make their own key parts — like pumps, PLC systems, and filling heads. If they design and build these parts themselves, it usually means they have strong technology and can solve problems quickly. Some experienced companies even adjust their filling process for different oil types — such as sunflower oil, peanut oil, or olive oil — so the machine works more smoothly and fills more accurately. - Export Case Studies and Customer Reviews.
You need to understand whether the supplier has genuine export experience. Can the filling requirements be matched according to the packaging style, bottle size and oil viscosity requirements? Reliable suppliers never rush to quote prices but understand the requirements of the filling project. - Customization and Flexibility.
Every factory is different. The oil type, bottle shape, and production goals can change from one company to another. A good automatic oil filling machine supplier won’t just give you a “one-size-fits-all” solution. Instead, they’ll listen carefully and design a filling system that fits your exact needs. - After-Sales Service.
After-sales service is crucial. Even the best machines cannot operate properly without good support. I often see complaints on Reddit: “We didn’t do our research beforehand! We paid a heavy price.” Before purchasing a filling machine, ensure the supplier has sufficient spare parts inventory. A complete filling system supplier should assist with installation, provide training on safe use and maintenance of the machine, and offer rapid online support. - Warranty and Quality Control.
Always check the warranty and quality assurance before making your final decision. Ask:
- How long is the warranty — 12 or 24 months?
- What parts are covered — mechanical, electrical, or both?
- Do they have ISO or CE certifications?
- Can they show you factory inspection or quality control reports?
Also, look beyond the price tag. A cheaper machine might seem good at first, but could cost more later — because of higher maintenance or downtime.
By looking at all these points, you can choose a supplier that is strong, reliable, gives great service, and grows together with your business. They are not just a machine seller— they are your real partner in making your edible oil filling line successful. Of course, if all this sounds too complicated, you can skip the search and just work with us — GQ-Agri. We have over ten years of experience in agricultural machinery manufacturing, a thorough understanding of the entire process, and have accumulated professional and high-quality connections in the industry. We can directly help you solve filling equipment problems at the equipment level.
GQ-Agri provides food-safe and durable filling machines for small and medium-sized edible oil processing plants. We believe that a well-planned filling production line is more than just a piece of equipment; it is the cornerstone of ensuring the hygiene and brand reputation of the edible oil market. Even if you plan to configure a large-scale, fully automated, complete filling line, I am happy to provide you with technical guidance and introduce you to professional factories I have known over the years. Contributing to the positive development of the industry is something we have always been committed to!
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Câu hỏi thường gặp
What is the overflow filling machine?
An overflow filling machine is a special type of packaging equipment. It has a dedicated nozzle that ensures every bottle is filled to the same level, no matter the size of the container.
How does a gravity filling machine work?
A gravity filling machine mainly uses the weight of the liquid and timing to control the filling amount. It’s easy to operate and can keep the fill consistent even in high-capacity production. So many suppliers of free-flowing edible oils choose it.
How do we choose different types of edible oil filling machines?
Usually, we need to determine the type of oil we want to produce, and then the production volume of the factory itself. In this way, we can help you choose the edible oil filling machine more specifically.
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