Short answer: a working tomato sauce and ketchup line needs five core machines — a washer, a boiling kettle, a pulping machine, a mixing kettle and a filling machine. Everything else is supporting equipment. This guide explains what each machine actually does, how to size it for your daily volume, and the mistakes that cost first-time owners their first season.

Sauce, ketchup, puree or paste — decide before you buy

These four products come off the same line but they are not the same thing, and the difference decides your machine sizes.

TSS means total soluble solids — how much of the product is not water. A fresh tomato sits at roughly 5–6% TSS. To reach ketchup at 28% you are boiling away a very large share of the water you brought in. That single fact drives your fuel bill, your kettle size and your yield, so fix your target product first.

The five machines you actually need

1. Tomato washer machine

Field tomatoes arrive with soil, spray residue, leaves and the occasional stone. Washing is not a formality — grit that reaches the pulper will score the sieve and shorten its life, and soil is where most of your microbial load comes from.

A bubble washer agitates the water with air so tomatoes tumble and release dirt without bruising. For a continuous line, an automatic conveyor washer washes and delivers straight to the next stage, which removes one manual handling step and the labour that goes with it.

Practical point: budget for a sorting table before or after the washer. One rotten tomato in a 200-litre batch will taint the whole batch, and no machine downstream can fix that. An SS working table is the cheapest quality control you will ever buy.

2. Tomato boiling kettle

Washed tomatoes are heated — usually called the break — before pulping. This does two jobs at once: it softens the fruit so the pulper releases more juice, and it deactivates the enzymes that would otherwise thin your sauce and dull its colour.

A gas operated boiling kettle suits units without a steam line. If you already run a boiler, a steam jacketed kettle heats far more evenly, which matters because direct flame on a heavy pulp scorches the bottom and you taste it in the finished product. For smaller or seasonal operations a double burner bhatti is the low-capital route.

If you go the steam route you also need a boiler. An industrial wood-fired non-IBR steam boiler stays under the IBR threshold, which keeps your statutory compliance considerably simpler than a registered boiler.

3. Tomato pulping machine

The pulper separates juice and pulp from skin and seed. This is the machine that decides your yield, and it is where people under-buy most often.

A 3 HP fruits and vegetables pulping machine handles a small to mid unit. A twin pulping machine runs two stages — a coarse pass then a fine pass — which lifts extraction and gives a noticeably smoother product. If you plan to sell ketchup in bottles rather than pulp in bulk, the twin stage pays for itself in mouthfeel alone.

Where volumes are high, a crusher ahead of the pulper breaks fruit down first and lets the pulper run faster without choking.

Sieve size is worth asking about when you order. A coarse sieve gives you more throughput and more yield; a fine sieve gives a smoother sauce and slightly lower yield. Most sauce units run a fine finishing pass.

4. Tomato pulp mixing machine

Now the pulp is concentrated and the recipe goes in — sugar, salt, vinegar, onion and garlic paste, spices. This stage runs long and it must not scorch, because sugar on a hot dry surface caramelises and turns your batch brown and bitter.

A mixing steam jacket kettle is built for exactly this: steam heats the jacket rather than the product, and the stirrer keeps everything moving so nothing sits against hot metal. This is the single most important machine for finished-product quality, and it is the wrong place to save money.

Two numbers to control here. Boil to your target TSS, checked with a refractometer — not by eye and not by the clock, because ambient humidity and batch size both shift the timing. And acidify to a pH at or below about 4.2 with vinegar or a permitted acidulant. That low pH is what makes tomato products safe with simple hot filling instead of pressure processing, so it is a food safety control, not a taste decision.

5. Tomato sauce filling machine

Sauce is viscous, so a water-style filler will fight you. A paste filler is built for thick product and gives consistent fill weights, which matters both for cost control and for legal net-quantity declarations. For thinner sauces and for starting small, a manual liquid filling machine is a reasonable first step.

Fill hot — around 85–90°C — and cap immediately. The heat sterilises the headspace and pulls a vacuum as the bottle cools, and that vacuum is a large part of your shelf life.

Then close the container. Glass bottles with crown caps need a crown corking machine, or a heavy duty crown corking machine for continuous runs. Lug-cap jars need a pneumatic lug capping machine. Pouches need a band sealer. Finally, batch number and expiry must be printed on every pack — a manual price codder handles this and it is a legal requirement, not an optional extra.

Supporting equipment people forget

• SS storage tanks — you need somewhere to hold pulp between stages. Without buffer capacity your whole line runs at the speed of its slowest machine.
• SS working tables — sorting, bottle handling, labelling.
• If you want a long ambient shelf life without preservative, look at canning and retort equipment: an exhaust box to drive out headspace air, a can seamer to close cans, and a canning retort for the heat process.

Yield: how many tomatoes for how much sauce

Plan on roughly 5 to 6 kg of fresh tomato per 1 kg of finished ketchup. The exact figure moves with the TSS of your incoming fruit, your target TSS, and how much sugar the recipe adds back.

Two things follow from that ratio, and both surprise first-time owners:

• Your raw material is the business. At those ratios, tomato cost dominates everything else. A unit that buys well in season and has somewhere to store pulp will out-earn a unit with better machines and worse purchasing.
• Fuel is your second-largest cost. You are paying to evaporate water. This is why kettle efficiency and a properly sized boiler matter more than they look on a quotation.

Sizing your line

Size for the season you actually want to run, not for the peak day you imagine. A line that runs at 60% for eleven months and struggles for one is a better business than a line that idles.

Space, power and water

• Space: a 500 kg/day unit fits comfortably in about 1,000–1,500 sq ft including raw material area, processing floor, packing and finished goods storage. Keep raw and finished areas separate.
• Power: three-phase. Add up the motor ratings of the machines you choose and add headroom; pulper and mixer draw the most.
• Water: washing uses a lot. Potable water is a licensing requirement, not a preference, and you should have your source tested.
• Drainage: plan it before you pour the floor. Retro-fitting drains into a finished food floor is expensive and never quite right.

Licences and paperwork

You will generally need an FSSAI licence — registration, State or Central depending on your turnover and capacity — along with GST registration, Udyam (MSME) registration, and a trade licence from your local body. Most brands also register a trademark before they print labels, which is far cheaper than rebranding later.

Label rules are strict for packaged food: name, ingredients, net quantity, batch, manufacture and expiry dates, FSSAI logo and licence number, veg mark and nutritional information. Get the artwork checked before you print thousands of them.

Thresholds and requirements change, so confirm the current position with FSSAI or your consultant rather than relying on any article, including this one.

Five mistakes that cost real money

1. Buying a filling machine sized for water. Sauce is viscous. A filler that cannot handle it will slow your whole line and give you inconsistent fill weights.
2. Skipping the refractometer. Cooking by eye means every batch is different, and inconsistent product is how you lose a distributor.
3. Ignoring pH. Above roughly 4.4 you are no longer making a high-acid food, and simple hot filling is no longer a safe process.
4. No buffer tanks. Every machine then waits for every other machine.
5. Under-sizing the boiler. A boiler that cannot hold pressure across the day quietly halves your output.

Frequently asked questions

Talk to us about your line

We manufacture every machine described above and we install and commission them across India, with operator training and GST invoicing. If you tell us your daily tomato volume, your target product and whether you have steam available, we will tell you exactly which models fit — and equally, where you can start smaller than you think.

Browse pulping machines, cooking kettles and boilers and filling and sealing machines, or send us your requirement.

Planning a spice or dehydration line instead? Read our guide to starting a turmeric, ginger and onion powder unit.

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