A brewery’s capacity is set by its cellar, and a cellar is only as good as the glycol system behind it. Fermenters and brite tanks are the visible investment; the glycol chiller, the distribution loop, the jacket balancing and the wort cooling are what decide whether those tanks can hold temperature when they are all full on a hot day. Paul Industries supplies, rigs and connects brewery tanks, designs and installs glycol systems and wort cooling, and plans cellars so the next expansion is a matter of adding tanks rather than re-piping.
Tanks and what decides them
| Tank | Role | What to specify |
|---|---|---|
| Fermenter (unitank) | Fermentation and often conditioning | Working and total volume, cone angle, jacket zones (cone and shell), pressure rating, dry-hop port, sample valve, CIP arm |
| Brite tank | Carbonation, conditioning, serving or packaging supply | Pressure rating for carbonation, carbonation stone, sight glass, jacket, dish or cone bottom |
| Hot liquor and cold liquor tanks | Brewing water storage | Insulation, heating or cooling, capacity for the brew day |
| Yeast brink and propagation | Yeast handling | Small jacketed vessels, aeration, pressure rating |
| Barrel and foeder vessels (distilling, sours) | Aging | Access, drainage, temperature control of the room rather than the vessel |
Tanks are pressure vessels; those rated above 15 psig carry an ASME stamp, and all closed tanks are fitted with pressure and vacuum relief because CIP drain-down and cooling pull vacuum. Cone angle, jacket zoning and the position of ports decide how the tank ferments, cleans and harvests yeast, and they are specified with the brewer, not from a catalog.
Glycol: the utility that caps growth
Every fermenter adds jacket load: crash-cooling a full tank from fermentation temperature to near freezing in a day or two, holding it there, and absorbing the heat of fermentation while it is active. A chiller sized for the original cellar runs out of capacity long before the brewer notices, because fermentation temperatures drift only slightly at first and the crash takes a day longer than it used to. The glycol loop is sized for the cellar the brewery plans to have, the chiller for the peak simultaneous crash load rather than the average, and the distribution laid out as a reverse-return or balanced loop with isolation and balancing valves at every jacket so the far tank gets the same flow as the near one. Glycol concentration is set for the lowest temperature required, usually 25 to 35 percent propylene glycol, and the system is insulated to keep condensation off the floor.
Jacket control
Each fermenter jacket zone gets a solenoid or control valve driven by the tank’s temperature controller, with the cone zone and the shell zone controlled separately on tanks that need it (cone cooling during crash and yeast harvest, shell cooling during fermentation). Air is eliminated at the high points, the loop is balanced so opening one valve does not starve another, and the return is monitored for temperature so the chiller can be staged. A brewery control system that logs tank temperatures and glycol supply and return temperatures shows when the chiller is reaching its limit months before it fails.
Wort cooling
Wort leaves the kettle near boiling and must be cooled to pitching temperature in the time it takes to transfer, through a plate heat exchanger against cold liquor water in the first stage and glycol in the second, or against cold water alone with a large enough cold liquor tank. The exchanger is sized for the knock-out flow and the wort’s outlet temperature in summer, when the water is warm; the heated water from the first stage is recovered to the hot liquor tank for the next brew, which is where much of a brewhouse’s energy saving lives. Wort exchangers foul with hop and protein material and are cleaned hot after every brew and opened for inspection on a schedule.
Rigging and setting
Fermenters and brite tanks arrive larger than most doors: they are rigged through openings, over walls or through the roof, set on pads poured for the load, leveled so the cone drains, and anchored where seismic rules require. The rigging route is planned before the tank is ordered, and the pad, the door and the glycol stub-outs are built for the tanks that will follow. Tank farms outdoors are set on foundations with insulated cladding and enter the building through wall sleeves.
Common mistakes that cap a cellar
- Chiller sized for the current cellar, with no headroom.
- Glycol loop run as a dead-end header with no balancing, so far tanks starve.
- Uninsulated glycol lines dripping on the cellar floor.
- Tanks ordered before the rigging route and pad were confirmed.
- Wort exchanger sized for spring water temperature, too small in August.
- Brite tanks with no vacuum relief, deformed during a cold CIP.
What Paul Industries installs
Fermenters, brite tanks, liquor tanks and yeast vessels from their manufacturers, rigged, set and connected; glycol chillers, distribution loops, balancing and jacket controls; wort heat exchangers, knock-out piping and hot liquor recovery; cellar process piping and CIP connections; and the expansion planning that keeps the next tanks off the critical path.
Standards referenced: ASME BPVC · 3-A Sanitary Standards · 21 CFR 117 · ASME B31.3
Frequently asked questions
How is a brewery glycol chiller sized?
For the peak simultaneous load, usually several fermenters crash-cooling at once while others absorb the heat of fermentation, plus wort cooling second-stage duty and brite tank holding, at the warmest ambient the plant sees, with headroom for the tanks the brewery plans to add. Sizing for the current cellar’s average load is the most common reason a growing brewery loses temperature control.
What glycol concentration does a brewery use?
Propylene glycol at about 25 to 35 percent by volume, set for the lowest temperature required (crash-cooling and brite tanks near 30 F) with margin against freezing in the chiller evaporator. Higher concentration reduces heat transfer and pump efficiency, so the concentration is set for the need, not for safety by default.
How should a brewery glycol loop be piped?
As a balanced or reverse-return loop with supply and return mains sized for the full planned cellar, isolation and balancing valves at every jacket, air elimination at high points, insulation throughout, and stub-outs for future tanks. A dead-end header without balancing starves the far tanks as soon as several jackets open together.
Why does a fermenter have separate cone and shell jacket zones?
Because the two do different jobs: the shell zone holds fermentation temperature while yeast is active, the cone zone cools the yeast for harvest and helps crash the tank, and controlling them separately gives cleaner fermentations and better yeast. Small fermenters may have a single zone; larger ones have two or more.
What pressure rating do fermenters and brite tanks need?
Fermenters typically 15 psig working pressure, brite tanks 15 to 30 psig for carbonation, with an ASME stamp where the rating exceeds 15 psig, and pressure and vacuum relief on every closed tank because CIP drain-down and cooling pull vacuum. Vacuum relief is the safeguard most often missing on a deformed tank.
How is wort cooled after the boil?
Through a plate heat exchanger during knock-out, in one stage against cold liquor water or in two stages with glycol finishing, to pitching temperature by the time transfer ends. The exchanger is sized for the knock-out flow and the summer water temperature, and the heated water is recovered to the hot liquor tank for the next brew.
Why does a wort heat exchanger need to be oversized?
Because incoming water is warmest in summer and the exchanger has to reach pitching temperature then, not in spring when it was commissioned, and because hop and protein fouling reduce its capacity between cleanings. A two-stage exchanger with glycol finishing decouples the outlet temperature from the water supply.
How are brewery tanks rigged into a building?
Through openings, over walls or through the roof by crane or forklift with rigging equipment, set on pads poured for the wet weight, leveled so the cone drains, and anchored where seismic rules require. The rigging route, the pad and the door are planned before the tank is ordered; tanks that do not fit are the most expensive surprise in a brewery expansion.
What is a unitank?
A fermenter designed to ferment and condition in the same vessel, with a cone bottom for yeast harvest, jacket zones on cone and shell, a pressure rating for natural carbonation, and ports for dry hopping, sampling and CIP. It reduces transfers and tank count at the cost of tying a tank up through conditioning.
How is a brite tank different from a fermenter?
A brite tank holds finished, clarified beer for carbonation, conditioning and packaging or serving: higher pressure rating, a carbonation stone, a sight glass, often a dish bottom rather than a steep cone, and a jacket sized to hold cold rather than to crash. It is not designed for yeast harvest or heavy fermentation loads.
What cellar temperatures does the glycol system need to hold?
Fermentation at 45 to 70 F depending on the beer, crash-cooling and conditioning near 30 to 34 F, brite tanks at serving or packaging temperature, and lagering below 40 F for weeks, all simultaneously in different tanks, which is why the loop supplies glycol at about 26 to 28 F and each jacket controls its own tank.
How is heat recovered in a brewhouse?
The first stage of the wort heat exchanger heats cold liquor water while cooling wort, and that hot water is stored in the hot liquor tank for the next mash and sparge, recovering most of the energy that went into the boil. Sizing the hot liquor tank to accept the full knock-out volume is what makes the recovery work.
What happens when the glycol system is undersized?
Fermentation temperatures drift, crash-cooling takes longer, brite tanks warm during packaging, and the chiller runs continuously; brewers compensate by staggering crashes and delaying transfers, which cuts throughput. Logging tank and glycol supply and return temperatures shows the limit months before a hot spell exposes it.
Can a brewery add fermenters without a new chiller?
Only if the chiller and loop were sized with headroom for them. Adding tanks to a system sized for the original cellar is the classic cause of lost temperature control; the fix is a second chiller in parallel or a larger unit, with the loop re-balanced, and it is far cheaper to have planned the stub-outs and capacity at the start.
How are outdoor tank farms built?
On foundations designed for the wet weight and wind, with insulated and clad tanks, glycol lines insulated and heat-traced where freezing is a risk, connections through wall sleeves into the cellar, and access for CIP and maintenance. Outdoor tanks free cellar floor space and are common once tanks exceed the building’s height.
What CIP considerations apply to brewery tanks?
Cold caustic or acid-based cleaners in carbonated tanks to avoid vacuum collapse from CO2 absorption, a spray device sized to the tank with coverage tested, a CIP arm or port at the top, drainage through the cone, and a CO2 purge before refill. Rotating jet heads replace spray balls as tanks grow.
How is yeast handled between tanks?
Harvested from the fermenter cone into a jacketed yeast brink, stored cold, and pitched into the next fermenter by pump or CO2 push, with propagation vessels for growing new yeast; the brink and propagator are small pressure-rated jacketed tanks on the glycol loop with their own temperature control.
What should a brewery’s cellar control system log?
A temperature probe and controller per tank driving its jacket valves, pressure gauges and relief on every tank, glycol supply and return temperature and flow indication, and a control system that logs tank temperatures and glycol conditions. The log is what shows the chiller approaching its limit and which tanks are starved.
What is the typical scope of a brewery cellar expansion?
New fermenters and brite tanks rigged and set, glycol loop extension or re-balancing and often a chiller addition, cellar piping and CIP connections, wort cooling capacity check, pad and structural work, and controls, planned so production continues through the work. The expansion is sized for the next round of tanks, not only this one.
Tanks, glycol or wort cooling: what does Paul Industries handle in a cellar?
Fermenters, brite tanks, liquor tanks and yeast vessels rigged, set and connected; glycol chillers, distribution loops, balancing and jacket controls; wort heat exchangers, knock-out piping and hot liquor recovery; cellar process piping and CIP connections; and expansion planning that keeps future tanks off the critical path.
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