Juice and Beverage Heat Exchangers

Nitrile wherever peel oil is present in quantity; EPDM for apple, grape and clear beverages. D-limonene in citrus oil swells EPDM, and the plant sees it as a gasket lip that has crept out of its groove at the hot-side ports after one citrus season. Nitrile holds its shape in oil but gives up some resistance to hot caustic, so a line that alternates citrus and clear juice usually keeps a set in each compound and swaps at the changeover. List every flavor the frame will see, with the CIP concentrations and temperatures, and we pick the compound before the plates are cut.

Yes, by at least 1 psi at every point in the regenerator, which is the dairy rule carried over. In a juice regenerator the raw stream at 45 F and the pasteurized stream at 190 F are separated by one plate and one gasket, and a pinhole or a lifted gasket moves product toward the lower pressure. A booster pump downstream of the hold, or a back pressure valve on the pasteurized outlet, keeps the direction safe, and a differential pressure switch tied to the flow diversion valve proves it on the chart.

Yes, as long as the blending happens cold ahead of the pasteurizer and the Brix is confirmed before heat is applied. Bringing a 65 Brix concentrate back to 12 Brix takes about 4.4 parts water to one part concentrate by weight, so the water is most of the product. The blend is thin and pulp-free and runs on plates at full regeneration. Two things change the picture: pulp cells added back put that SKU on the tube route, and a concentrate whose evaporator already killed the cloud enzyme needs only the microbial hold, 185 F for 15 seconds, unless single-strength juice is blended in. Tell us the Brix in and out and whether pulp is dosed.

About 85 tons at 90 percent regeneration, treating juice as water. The regenerator brings pasteurized product from 190 F to about 60 F for nothing, and glycol removes the last 20 degrees: 100 gpm times 500 times 20 is 1,000,000 Btu/h, which is 83 tons at 12,000 Btu/h per ton. With no regeneration the same line would need the full 150 degree drop from the glycol, 7,500,000 Btu/h or 625 tons, which is why nobody builds a cold-fill line without a regeneration section. A tubular pulp line at 65 percent regeneration lands between those figures, with tower water taking part of the load first. Send the fill method and the glycol supply temperature and we size the cooler against the refrigeration you actually have.

Run from the mildest flavor and lightest color to the strongest, then do a full CIP before going back. A water push takes apple to white grape cleanly. Grape and berry pigment and citrus oil, on the other hand, stay in the plate pack and in the gasket surface, and the first clear juice through afterward picks up a tint and a taste. Where a dairy-based smoothie shares the frame, the changeover is a validated allergen clean with a swab or rinse test before the next product starts.

The whole thermal process: above pH 4.6 a 185 to 195 F pasteurizer no longer produces a shelf-stable product. The target organism becomes a spore-former, and the choices are to acidify the juice below pH 4.6 and keep the high-acid schedule, to sell it refrigerated with a short shelf life, or to sterilize it at 250 F or more and fill aseptically. The third route is a different build: the heater runs on pressurized water, the hold is kept above the saturation pressure of about 15 psig at 250 F so the juice cannot flash, and the cooler sits inside a sterile zone with steam barriers on every seal. Decide the classification with your process authority first; the exchanger quote follows from it, and a line that may add a low-acid SKU later should say so now, because the pressure rating cannot be added afterward.