What the capacity classes mean
Industrial vacuum fryers are batch machines: product is loaded into a basket, fried in hot oil at 80–100°C inside a sealed vessel, spun to remove oil, and unloaded. The model name — QS-VF100, QS-VF150, QS-300 — indicates the machine's capacity class: 100 KG, 150 KG, and 300 KG grades respectively.
That class number is a throughput grade, not a guarantee that every batch will weigh exactly that much. Real kilograms per batch depend on the product: bulk density (nuts and fried fish are dense; vegetable slices and crisps are light and bulky), piece size, and how full the basket is packed. Two buyers with the same model can see very different per-batch weights simply because their products differ — for example, the QS-VF150 is rated around 30–50 kg per batch, and the range itself reflects product differences.
Use the class as a starting filter between models, but make the buying decision on your own numbers, covered in Sizing the fryer to your output target below. Before comparing classes, read what vacuum frying is to make sure the process fits your product.
Model comparison: QS-VF100 vs QS-VF150 vs QS-300
Capacity classes and confirmed reference data
| Model | Capacity class | Confirmed capacity data | Confirmed vessel data |
|---|---|---|---|
| QS-VF100 | 100 KG class | Confirm with supplier | Confirm with supplier |
| QS-VF150 | 150 KG class | About 30–50 kg per batch (product-dependent) | Confirm with supplier |
| QS-300 | 300 KG class | Confirm with supplier | Vessel 2600 mm (H) × 1600 mm (D) |
- All models: batch vacuum frying at 80–100°C, with built-in centrifugal de-oiling under vacuum.
- Any cell marked "confirm with supplier" means the figure was not on the confirmed specification sheet — ask for it before comparing quotes.
- QS-VF100 (100 KG class) — product trials, R&D, boutique snack brands, and plants launching a first line at modest volumes.
- QS-VF150 (150 KG class) — the mid-size workhorse for regional brands and contract manufacturers running a steady daily schedule at about 30–50 kg per batch, product permitting.
- QS-300 (300 KG class) — high-volume lines where a single large vessel (2600 mm high × 1600 mm diameter) keeps batches-per-day manageable. Confirm footprint, floor loading, and oil volume with the supplier first — a 300 KG-class vessel is a serious piece of plant.
Specifications are for reference only and are subject to the final supplied equipment.
Sizing the fryer to your output target
Size from your own numbers with this simple chain:
1Daily finished-product target (kg)
Start with finished snack weight per day — not raw material, since moisture loss during frying reduces weight. Size for your normal peak week, not the quiet month.
2Batches per day
Estimate realistic batches per shift: a full cycle is loading + frying + de-oiling + unloading, plus changeover time for multiple products. Optimism at this step is the most common cause of undersizing.
3Required kg per batch = target ÷ batches
Divide the daily target by batches per day. Match the result against the capacity class in kilograms of your own product — bulk density swings the real per-batch weight, so a buyer frying potato slices and one frying peanuts need very different vessel volumes for the same kilogram target.
4Add headroom
Add roughly 20–30% headroom for growth and product-mix changes, then choose the smallest class that meets it. Headroom is cheap at purchase and expensive to retrofit — a second machine costs far more than one size up.
Two details buyers often forget: product bulk density (size for the bulkiest product in your plan — a fryer sized for peanuts will bottleneck on sweet potato slices) and oil handling capacity (larger batches need correspondingly larger oil filtration turnover to keep frying oil fresh through the day).
What matters beyond capacity
Two machines with the same capacity class can differ enormously in running cost and product quality. When quotes land, compare these points:
Heating system and temperature control
Vacuum frying lives at 80–100°C, and tight, even temperature control is what gives consistent color and texture batch after batch. Ask how the oil is heated (electric, thermal oil, or other), how uniform the temperature is across the vessel, and what controls it.
Oil filtration
Filtration removes food particles that otherwise scorch and degrade the oil, darkening the product and shortening oil life. Ask what filtration is included, its throughput relative to the oil volume, and how often filter media must be replaced.
Centrifugal de-oiling under vacuum
De-oiling is what keeps a vacuum-fried snack crisp rather than greasy: spinning the basket while still under vacuum strips surface oil before air pressure returns. Compare spin speed, spin time, and whether the stage genuinely stays under vacuum — some designs break vacuum early, and oil uptake rises.
Vacuum system
The vacuum pump sets how fast the vessel reaches working vacuum between cycles and how stable it stays during frying. Ask for the pump configuration, ultimate vacuum level, and pump-down time per cycle.
Controls and operation
Vacuum frying is a multi-stage process (heat, vacuum, fry, de-oil, unload). PLC controls with recipe storage reduce operator error and make quality repeatable across shifts — ask what is automated versus manual on each model.
Footprint, utilities, and hygiene design
Get the overall dimensions, weight, electrical supply, and drainage/oil-handling requirements in writing, and confirm the delivery route fits. Check that food-contact surfaces and the basket design allow thorough cleaning between products — important for allergen management when you run nuts and other products on one line.
After-sales and lead time
Supreme Beast equipment ships with a 1-year warranty and an approximate 3-month lead time — use that as your planning baseline. Confirm in writing what commissioning support, operator training, and spare-parts availability are included, and how service requests are handled in your region. A fryer is a long-lived asset; the supplier relationship matters as much as the steel.
Questions to ask a supplier before buying
The answers separate a serious quote from a brochure — bring this list to every supplier conversation:
- What is the rated kg per batch for my specific product (bulk density, piece size), not the generic class figure?
- What are the exact overall dimensions, weight, electrical supply, and utility connections?
- How is the oil heated, and what is the temperature control accuracy across the vessel?
- What oil filtration is included, and what is its throughput relative to the oil volume?
- Does centrifugal de-oiling run under full vacuum? What are the spin speed and spin time?
- What is the vacuum pump configuration, ultimate vacuum, and pump-down time per cycle?
- Which process steps are automated, and does the control system store recipes?
- What is included in commissioning, operator training, and the 1-year warranty?
- How are spare parts and service handled in my region, and what is the typical response time?
- What is the confirmed lead time, and what site preparation must I complete before delivery?
Common sizing mistakes
- Undersizing to save capital. A machine running flat-out leaves no room for maintenance or growth — and a second machine later costs far more than one size up today.
- Sizing on the densest product. If you fry peanuts today and add sweet potato chips next year, the lighter, bulkier product will not fit the same kg-per-batch math. Size for the bulkiest product in your plan.
- Ignoring product density differences between quotes. When two suppliers quote different "batches per day" for the same class, the difference is usually product-density and cycle-time assumptions — make them show their math with your product.
- Forgetting oil turnover. Bigger batches generate more debris and demand more filtration. A fryer with a great vessel and a token filter will cost you in oil consumption and product color.
- Counting batches without changeover time. Running several products costs hours in cleaning and re-setting between products — those are batches you will not run.
- Buying on price alone. The cheapest quote with weak de-oiling, manual controls, and no local service is the most expensive machine you can buy — it charges you in oil, rework, and downtime for years.
For a side-by-side look at the conventional alternative, see vacuum frying vs deep frying.
Frequently asked questions
What does 100KG / 150KG / 300KG class actually mean on a vacuum fryer?
The capacity class is the manufacturer's rating of the machine's throughput grade — not a promise that every batch will load that weight. Real kg per batch depends on the product's bulk density, piece size, and basket fill: light, bulky products like potato slices fill the vessel at lower weights than dense products like nuts or fried fish. Use the class as a starting filter, then size from your daily output target — finished kilograms per day divided by the batches your shift plan allows — and confirm the supplier's rated per-batch figure for your specific product.
How do I size a vacuum fryer for my target output?
Start with your daily finished-product target in kilograms, then divide by the number of batches you can realistically run per shift — a full cycle is loading, frying, de-oiling, and unloading. That gives the kg per batch you need; add headroom of about 20-30% for growth and product mix changes, and choose the smallest class that meets it. Always size in kilograms of your own product, because bulk density swings the real per-batch weight: for example, the QS-VF150 handles about 30-50 kg per batch depending on the product.
Can one vacuum fryer handle different products?
Yes — most plants run several products through one machine by adjusting frying temperature, cycle time, and load per batch. The catch is sizing: size the machine for the bulkiest product you intend to run, since a fryer that hits a nuts target may fall short on lighter products like vegetable slices. For frequent changeovers, ask the supplier about cleaning access and oil filtration between products, and allow changeover time in your batches-per-day math.
Why is centrifugal de-oiling under vacuum important?
De-oiling is what keeps a vacuum-fried snack crisp rather than greasy. After frying at 80-100°C under vacuum, spinning the basket centrifuge while the vessel is still under vacuum strips surface oil before air pressure returns and forces oil into the product. Machines without effective under-vacuum de-oiling leave noticeably higher residual oil, so treat the de-oiling system — not just basket size — as a key comparison point.
How far ahead should I order, and what does after-sales cover?
Plan around a lead time of approximately 3 months from order to delivery, and complete site preparation — power, floor space, oil and utility connections, and the delivery route — before it lands. Equipment is supplied with a 1-year warranty; before signing, confirm in writing what the warranty covers, what commissioning support and operator training are included, and how spare parts and service are handled in your region.
Not sure which vacuum fryer fits your output?
Tell us your product, target output per day, and batch plan — we'll help you pick the right model and provide the full utility list.
Specifications are for reference only and are subject to the final supplied equipment. Sizing guidance is general information based on typical plant practice; confirm all capacity, utility, and site requirements with the supplier's engineering documentation before ordering.