A hotel group or central kitchen that decides to bring vegetable preparation in-house normally starts by pricing machines: a washer, a peeler, a cutter. What arrives is three machines that each work perfectly well, installed in a room that still cannot get 800 kg of vegetables ready before service. The equipment was bought as items rather than as a line, and a line only ever runs at the speed of its slowest stage.<\/p>\n
This guide covers how to size a vegetable preparation line by throughput instead of by seat count, what each stage actually does to your yield and your water bill, the power and drainage the room has to provide, and indicative FOB China prices for 2026.<\/p>\n
A food processor is a single machine that slices or dices a batch a cook has already washed and trimmed. A vegetable prep line is a sequence of machines that takes raw, soil-bearing produce off a delivery pallet and turns it into washed, peeled, cut, drained product. The two are complements: most kitchens under roughly 400 covers a day are better served by a bench machine, and our commercial food processor buying guide<\/a> covers that tier. A line earns its floor space once raw intake passes roughly 300\u2013500 kg a day, or when one production unit supplies several outlets.<\/p>\n A conventional line has five stages \u2014 reception and sorting, washing, peeling, cutting, dewatering \u2014 feeding chilled holding. Not every kitchen needs all five. A hotel buying pre-peeled potatoes can drop the peeler; a salad-heavy operation may need two wash tanks and a centrifuge but no peeler at all. What matters is that the stages you do install are rated to the same throughput.<\/p>\n Size the line in kilograms per hour of raw intake, not in covers. Work backwards from three numbers.<\/p>\n Then derate. Manufacturer ratings are measured on one ideal product \u2014 usually potatoes or cabbage \u2014 with continuous feeding and no changeover. A real prep room switches product six or eight times a shift, and each changeover costs three to eight minutes for blade swaps and rinsing. Plan on 60\u201370% of nameplate. A cutter rated 500 kg\/h is a 300\u2013350 kg\/h machine in a hotel.<\/p>\n Basket or tank bubble washers<\/strong> (300\u2013500 kg\/h) agitate a submerged batch with air from a side-channel blower. Gentle, good for leaf and herbs, and they fit rooms that cannot take a conveyor. Being batch machines, real output depends on how fast staff load and unload.<\/p>\n Continuous bubble washers<\/strong> run 500\u20132,000 kg\/h with an inclined outfeed conveyor and a recirculation pump; large units reach 3,000 kg\/h. These are the central-kitchen workhorses because they hold a steady rate and hand off directly to the next stage.<\/p>\n Vortex and spray washers<\/strong> use directed water flow rather than air. More aggressive, which suits root vegetables carrying heavy soil but damages delicate leaf.<\/p>\n For visibly soiled produce, one tank is not enough. The standard arrangement is three stages: a pre-wash to shed soil and stones, a main sanitising wash, and a clean-water final rinse. A single tank means the last basket of the shift is washed in the accumulated soil of the first.<\/p>\n Chlorine remains the most widely used produce wash sanitiser. Published guidance from the US FDA describes chlorine added to post-harvest wash water at roughly 50\u2013200 ppm total chlorine, at pH 6.0\u20137.5, with a contact time of about one to two minutes. Canadian guidance sets an operating window around 100\u2013150 ppm total chlorine, with 2\u20137 ppm free residual chlorine after contact with the produce, and a final rinse at that lower residual level. Contact time should generally stay under five minutes.<\/p>\n Three practical points follow from that, and all three belong in your equipment specification rather than in a training manual:<\/p>\n Wash water is also why prep rooms flood. A continuous washer discharges 200\u2013600 litres per tank dump carrying grit that will silt any drain not designed for it. Specify a channel drain with a removable silt basket rather than a point gully, and set the run out early \u2014 see our kitchen drainage and grease trap guide<\/a>.<\/p>\n Commercial peelers work by tumbling produce against an abrasive drum and disc while water flushes the skin away. Batch machines take 10\u201330 kg per load and deliver roughly 200\u2013600 kg\/h. Continuous rumblers reach 1,000 kg\/h peeling and up to 1,500 kg\/h polishing.<\/p>\n The specification argument that matters is yield, not throughput. Abrasive peeling removes 8\u201315% of raw weight on potatoes depending on drum time, abrasive grade and tuber shape, and more on irregular roots such as carrots and celeriac. Over-peeling is the largest hidden cost on the line and it is entirely a matter of timer discipline: a kitchen running 300 kg of potatoes a day that over-peels by five percentage points throws away roughly 15 kg daily.<\/p>\n So specify a peeler with a repeatable digital timer rather than a spring dial, size the batch so the drum runs 60\u201380% full (an under-loaded drum tumbles badly and peels unevenly), and insist on a peel-waste outlet discharging into a solids trap. Peel is starch and skin; it will not pass a grease separator and it blocks a 100 mm branch quickly.<\/p>\n Cutters divide into three tiers. Bench multi-function machines with gravity hopper feed run below roughly 200 kg\/h and suit single-site restaurants. Mid-range floor units with belt feed handle 300\u20131,000 kg\/h. Industrial belt-feed slicers and dicers reach 2,000\u20133,500 kg\/h.<\/p>\n Two decisions matter more than the headline rate. Feed type: gravity hopper feed is cheaper and gives inconsistent cut on long produce, while belt feed with a hold-down keeps geometry consistent \u2014 which is what actually drives cooking uniformity in a central kitchen. And the blade set: most quotations include two or three discs, while a working hotel kitchen needs slicing at two thicknesses, julienne, dicing at 10 mm and 20 mm and a shredding disc, so six to eight. Price the discs you need at quotation stage, because ordering them later means a second shipment for a few kilograms of steel.<\/p>\n Cut, washed vegetables carry surface water, and in a salad or a chilled pack that water halves shelf life, dilutes dressing and produces the pooling customers reject. A dewatering centrifuge takes 10\u201330 kg per batch on a 1\u20133 minute cycle. It is the cheapest quality upgrade on the line and the one most often value-engineered out. If the kitchen produces chilled salad, prepared fruit or vacuum-packed vegetables, it belongs in the specification.<\/p>\n Indicative FOB China ranges for 304 stainless equipment, exclusive of freight, duty and local installation:<\/p>\nHow do you size a vegetable prep line?<\/h2>\n
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Washing: bubble, vortex or a three-tank sequence?<\/h2>\n
What goes in the wash water?<\/h2>\n
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Peeling: what does abrasive peeling really cost you?<\/h2>\n
Cutting: blade sets, feed type and honest throughput<\/h2>\n
Dewatering: the stage most kitchens skip<\/h2>\n
What power, water and drainage does the line need?<\/h2>\n
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Vegetable prep line FOB prices, 2026<\/h2>\n