Industrial vacuum pumps
Rotary vane and claw vacuum for feed tables, transport belts, and register control on sheet-fed and web presses.
Spec press vacuum
Industry: Printing and converting
Compressed Air and Vacuum for Printing and Converting
- Since 1978
- Sullair dealer since 1984
- 14 locations
- under 2 hour response
Pressroom Air and Vacuum Spec Plate
- Pressroom air
- Clean, dry, oil-free at point of use
- Refrigerated dew pt
- 38 F general use
- Desiccant dew pt
- -40 F for printheads
- Vacuum
- Sized to fastest sheet rate
- Dealer
- Sullair since 1984
What compressed air and vacuum does a printing and converting plant need?
A printing and converting plant runs two utilities that decide print quality: compressed air that must reach the sheet clean and dry, and vacuum that holds every sheet in the same position as the press runs. Air feeds printheads, dampening systems, air knives, and static-control blow-off, so moisture and oil have to be removed by drying and filtration before they reach the sheet. Vacuum holds sheets to feed tables, transport belts, and register tables, and controls web tension on web presses. Sizing the drying to the point of use and the vacuum to the fastest sheet rate is what keeps registration repeatable.
Printing and converting air and vacuum lineup
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Rotary Screw (Pressroom Air)
- Use
- Cylinders, air knives, tools
- Output
- 50 to 800 CFM
- HP range
- 15 to 150 HP
- Control
- VSD for variable demand
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Refrigerated and Desiccant Drying
- Refrigerated
- 38 F dew point
- Desiccant
- -40 F for printheads
- Filtration
- Coalescing plus particulate
- Goal
- No oil or moisture on sheet
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Vacuum for Feeding and Web Handling
- Use
- Feed tables, transport, register
- Style
- Rotary vane or claw
- Control
- Sized to fastest sheet rate
- Config
- On-board or central manifold
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Blowers for Sheet Separation
- Use
- Pile separation, sheet float
- Pressure
- Low pressure, high volume
- Style
- Regenerative or claw
- Pairing
- Combined pressure and vacuum
45 + Years in Business
14 Midwest Locations
4.7 Star Google Rating
Pressroom air and vacuum specification guide
Print quality depends on two things the utility system controls: air that reaches the sheet clean and dry, and vacuum that holds every sheet in the same position at speed. The specification splits by point of use.
Two utilities, split by point of use
Air, general pressroom: Rotary screw with refrigerated drying to a 38 F dew point and coalescing plus particulate filtration for cylinders, air knives, and blow-off.
Air, printheads and precision dampening: Desiccant drying to a negative 40 F dew point with tight filtration where inkjet jets or fine dampening cannot tolerate any moisture or oil.
Vacuum: Rotary vane or claw pumps, combined pressure and vacuum on the feeder or a central manifold, sized and controlled to the fastest sheet rate the press runs so hold-down stays steady.
Run the numbers yourself
- Use the CFM calculator to size the compressor to combined press blow-off, air knife, and tool demand.
- Use the air receiver tank calculator to buffer the intermittent blow-off and separation surges that come with every sheet cycle.
- Use the compressed air leak calculator to price the leaks on old feeder and manifold plumbing that quietly starve register air.
See our packaging page for related converting and finishing line air and vacuum guidance.
What compressed air really costs
- 10% of US industrial electricity goes to compressed air Source: US DOE Compressed Air Sourcebook
- 20 to 30% of compressed air is typically lost to leaks Source: US DOE Compressed Air Sourcebook
- 75% of ten year compressor cost is energy, not purchase price Source: CAGI life cycle cost data
- under 2 hr average emergency response across our territory Source: Brabazon dispatch
Where printing and converting plants use air and vacuum
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Feeder sheet separation
Low-pressure blow-off floats and separates the top sheet in the pile so the feeder lifts one sheet at a time without doubles or misfeeds.
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Vacuum sheet transport
Vacuum holds sheets to feed tables and transport belts so each sheet reaches the first print unit in a repeatable position.
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Register control
Stable vacuum on register and pull-lay tables keeps sheet position consistent, which is what makes color-to-color and front-to-back register repeatable.
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Inkjet printhead air
Dry, oil-free filtered air protects inkjet printheads and jet nozzles from moisture and hydrocarbon contamination that clogs and misfires jets.
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Dampening and air knives
Clean air runs dampening system controls and air knives that remove residual moisture and debris from the sheet ahead of the next unit.
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Web tension and turn bars
Air-flotation turn bars and vacuum rollers control web tension on web presses so the web tracks without wrinkles or wander.
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Converting: die cutting and folder-gluers
Compressed air and vacuum feed and hold stock through die cutters, folder-gluers, and laminating nips where nip pressure and sheet control are critical.
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Static control blow-off
Ionized air blow-off neutralizes static and clears dust from the sheet and web, which reduces feed faults and print defects on plastic and coated stock.
What keeps a pressroom air and vacuum system reliable
Four disciplines keep utility air and vacuum from showing up as register drift, print defects, and reject sheets.
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Clean, dry air protects print quality
Moisture and oil in pressroom air do not stay in the pipe. They reach printheads, dampening systems, and air knives, where they clog nozzles, contaminate ink and fountain solution, and mist onto the sheet. A dryer sized to the plant conditions plus a coalescing and particulate filter train keeps the air off the sheet clean, which directly lowers reject rates.
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Refrigerated versus desiccant drying
Refrigerated drying to a 38 F pressure dew point covers most pressroom air in a climate-controlled plant. Desiccant drying to a negative 40 F dew point is reserved for inkjet printheads, precision dampening, and any line that runs through cold or unheated space where a 38 F dew point would still condense. Matching the dryer to the point of use avoids both wet air and the cost of over-drying every line.
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Vacuum stability drives registration
Register accuracy depends on every sheet arriving in the same position. That requires vacuum that holds steady as the press speeds up and slows down. Undersized or poorly controlled vacuum lets sheets shift at high sheet rates, which shows up as register drift. Sizing the vacuum pump and its control to the fastest sheet rate the press runs keeps hold-down consistent across the speed range.
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Combined pressure and vacuum, or central systems
Sheet-fed presses need both blowing air for sheet separation and vacuum for pick and transport. Combined pressure and vacuum pumps supply both from the press feeder. Where a plant runs several presses, a central blower and vacuum system with a manifold can replace individual on-board pumps and add redundancy, so a single pump fault does not stop a press.
Recommended setup for printing and converting plants
For a sheet-fed pressroom, the package we configure most pairs a VSD rotary screw compressor with a refrigerated dryer and a coalescing and particulate filter train for general air, plus a small desiccant leg dried to a negative 40 F dew point for any inkjet or precision dampening lines. Vacuum comes from rotary vane or claw pumps sized to the fastest sheet rate, either as combined pressure and vacuum units on the feeder or as a central manifold serving several presses. See the rotary screw page, the dryers and filters page, and the industrial vacuum page for equipment details.
When central vacuum beats on-board pumps, and when it does not: a central blower
and vacuum system with a manifold adds redundancy and takes noise and heat off the press floor,
which pays off in a multi-press plant. For a single press, the on-board combined pressure and
vacuum pump is simpler, cheaper, and easier to service, and the redundancy argument does not
apply. The right answer follows the number of presses and how much a stopped press costs.
Typical project: Printing and converting
Matching drying and vacuum to the press keeps register stable at full speed
A common scenario in this industry is a sheet-fed plant that runs clean at low speed but drifts out of register when the press is pushed to full sheet rate. A typical project starts when the vacuum pump and its control cannot hold steady hold-down at speed, so sheets shift on the register table, and at the same time a refrigerated dryer feeding an inkjet coder lets enough moisture through to clog jets in a cold corner of the plant. Brabazon-configured equipment solves this by sizing the vacuum pump and control to the fastest sheet rate so hold-down stays constant across the speed range, and by adding a desiccant drying leg to a negative 40 F dew point on the printhead and coder lines. Register holds through the full speed range and printhead faults from moisture stop.
Printing and converting support across the Midwest
Factory-trained technicians dispatch from 14 branches with an under 2 hour average emergency response. Find your nearest branch:
Questions engineers actually ask us
Why does a printing press need clean dry compressed air?
Moisture and oil carried in compressed air migrate into printheads, dampening systems, and air knives, where they cause nozzle clogging, ink and fountain solution contamination, and misting on the sheet. Drying the air to a stable dew point and filtering out oil and particulate protects print quality and reduces reject rates on both sheet-fed and web presses.
Should a print shop use a refrigerated or desiccant dryer?
A refrigerated dryer holding a pressure dew point near 38 F is adequate for most pressroom air used on cylinders, air knives, and general blow-off in a climate-controlled plant. Desiccant drying to a negative 40 F dew point is used where air feeds inkjet printheads, precision dampening, or lines that run through unheated or cold areas where a 38 F dew point would still condense.
How does vacuum support sheet feeding and web handling?
Vacuum holds sheets to feed tables, transport belts, and register tables so each sheet arrives at the print unit in the same position. On web presses vacuum controls web tension and holds the web on turn bars and rollers. Stable vacuum pressure directly affects register accuracy, so the pump and its control are sized to the fastest sheet rate the press runs.
Why do sheet-fed presses use combined pressure and vacuum pumps?
Sheet-fed presses need both a blowing supply to separate the top sheet in the pile and a vacuum supply to pick and transport it. Combined pressure and vacuum pumps deliver both from one machine, which suits the press feeder. Where a plant runs several presses or wants central redundancy, a shared blower and vacuum system with a manifold can replace the individual on-board pumps.
Who services printing and converting air and vacuum systems in the Midwest?
Brabazon has supported printing and converting plants from 14 Midwest locations since 1978 and has been the authorized Sullair distributor since 1984. We provide compressors, vacuum pumps, blowers, air treatment, and service across Wisconsin, Illinois, Minnesota, and Missouri, with an under 2 hour average emergency response.
Where to go next
Get Your Pressroom Air and Vacuum Reviewed
Tell us your presses, sheet rates, stock types, and where inkjet or precision dampening air is needed. We match the compressor, drying, filtration, and vacuum to the point-of-use requirements so quality stays consistent at full speed.