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Packaging Line Cooling

Form-Fill-Seal & Adhesive Systems

Seals and adhesive need a steady, cool fluid supply

SEAL-BAR & ADHESIVE COOLING

Consistent Seals
at Line Speed

A packaging line only runs as fast as its cooling side lets it - seals and adhesive both need a steady, cool fluid supply to set correctly.

Form-fill-seal equipment uses cooling water to set seal bars and cool film after each seal cycle, and running that water too warm slows the achievable line speed or produces inconsistent seals - both of which show up as downtime or rejected product on a packaging line that's otherwise running fine.

Hot-melt adhesive systems have the opposite problem in the same process: the adhesive has to stay hot enough to apply, then cool fast enough after application to bond the case or carton before it moves on. A dedicated Advantage chiller loop for the cooling side keeps that timing consistent independent of ambient plant temperature or how hard the rest of the building's cooling is working.

  • Seal-bar and film cooling water for form-fill-seal equipment
  • Cooldown of hot-melt adhesive after application, independent of plant temperature
  • Moderate, steady loads - often a good fit for a dedicated Advantage portable chiller
Automated packaging and cartoning line in motion

Packaging loads are usually modest tonnage but demand tight, repeatable fluid temperature - an Advantage MG portable chiller dedicated to the line is often the simplest fit. See Portable Chillers for single-line packages sized to this kind of steady, moderate load.

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Sizing Packaging Line Cooling

Packaging-stage cooling isn't about a food-safety window the way pasteurization is - it's about getting filled product and containers to a temperature where labels adhere properly, cartons don't sweat, and product doesn't shift or settle before it's sealed and palletized. That makes the target leaving fluid temperature milder than upstream process cooling, but the throughput and continuous nature of the load still has to be sized correctly.

Packaging lines commonly run continuously through a shift rather than in the sharp batch spikes typical of pasteurization or fermentation, so total tonnage is usually closer to a steady average - but line speed changes and product mix shifts still need to be accounted for in the peak.

Send Us

  • Line throughput and target product/container temperature at the packaging step
  • Continuous or shift-based operation
  • Whether condensation control (label adhesion, carton sweat) is a factor
  • Indoor or outdoor installation

What Packaging Cooling Protects

Line Throughput

Condensation Control

40-55°F LFT

Continuous Duty

TYPICAL RANGES BY PACKAGING STEP

Packaging Step Leaving Fluid Temp Load Profile Notes
Container/bottle pre-label cooling 45-55°F Continuous, steady Prevents label adhesion failure
Filled-product cooling before sealing 38-48°F Continuous, moderate Protects product texture/shelf life; glycol below 48°F
Cold-chain staging before palletizing 34-40°F Continuous, steady Maintains cold-chain compliance; glycol loop

Product, packaging material and line speed each pull the leaving fluid temperature off these typical values, so send all three with the request.
Call and talk it through with an engineer: 1-805-484-2992.

Line speed, seal jaws and the cooling water behind them

Start from the heater nameplate. Seal jaws are electrically heated, and the cooling water only removes the share of that heat that leaks into the cooled parts of the machine, so heater wattage is a ceiling. A form-fill-seal machine with 3 kW of jaw heaters can put at most about 10,200 BTU/hr into its cooling circuit - under a ton - and the real figure is usually well below that. Add up the heaters on every cooled assembly on the line, convert at 3,412 BTU/hr per kW, and you have a safe upper bound to quote against.

Convert containers to pounds per hour, then multiply by the temperature drop and the specific heat. 120 bottles a minute of a 20-ounce drink is 7,200 bottles, roughly 9,400 pounds of product an hour. Dropping that 15°F at a specific heat near 1.0 is about 140,000 BTU/hr, close to 12 tons, before the container itself is counted. That is a real load, though still well inside the Advantage MG portable range. The common slip is quoting from the nameplate speed of a filler that actually runs 20% slower, or the reverse after an upgrade.

Rarely well. Tower water in summer often arrives at 80-85°F, too warm to hold a 40-55°F target, and its temperature follows the weather - exactly the variation that makes seals inconsistent, which is why seal complaints cluster in July. City water is colder but costs money on every pass: a one-ton load at a 10°F rise needs 2.4 GPM, about 3,500 gallons a day on a 24-hour line, often billed again as sewer. A closed loop on a small chiller reuses the same water all year.

Check two things, not one. Product cooling scales with throughput, so a 10-ton container load becomes 12 tons. Seal jaws are subtler: shorter dwell per cycle gives the jaw less time to shed heat, so the machine often wants colder water or more flow to set the same seal, and a colder setpoint trims chiller capacity at the same time. A unit that was comfortable at the old speed can come up short on both counts at once. Send the old and new speeds and the water temperature measured at the jaws today.

Into the packaging room, plus some. An air-cooled chiller rejects the process load and its own compressor heat - adding up to about 1.25 tons of rejected heat per ton of cooling, roughly 15,000 BTU/hr - so a 10-ton unit on the floor dumps about 150,000 BTU/hr into the space. In a room fighting carton sweat or warm labels, that works against the very thing the chiller is there to fix. A water-cooled unit or a remote-condenser MG keeps the compressor and pump by the line and puts the rejected heat outdoors.

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