Atlas Copco ZT 110 VSD (FF VSD⁺) Oil-free Air Compressor

The Atlas Copco ZT 110 VSD is the 110 kW (150 hp) air-cooled oil-free compressor whose published data splits into two working pressure classes, 8.6 bar(e) and 10.4 bar(e), each carrying its own swept envelope. That split is the first decision a buyer makes, because the low-flow starting point changes with the pressure class: the 8.6 bar(e) table opens at 4 bar(e) and 101 l/s, while the 10.4 bar(e) table opens at 6.5 bar(e) and 166 l/s. The air path never meets oil, so the compressed stream reaching the process carries no lubricant that a downstream filter would otherwise have to catch, and the machine needs no cooling water circuit to reject its heat.

Reading the ZT 110 VSD Pressure Envelope

Each pressure class is described by three rows. Minimum marks the lowest pressure the drive will hold and the flow band at that end, Effective marks the 7 or 9 bar(e) point where most general headers sit, and Maximum marks the rated top pressure with the flow available there. The installed motor is 110 kW (150 hp) throughout, and the figures below are the published metric and imperial values for the ZT 110 VSD.

The ZT 110 VSD reads 79 dB(A) at the work station for the ZT 110–160 (VSD) group with the cooling-air ducting fitted to the outlet grating. For the ZT 110 VSD, between the two classes the 10.4 bar(e) Minimum row begins 65 l/s above the 8.6 bar(e) Minimum row, which is the trade a site accepts when it specifies the higher pressure class but spends long hours at part load. The 8.6 bar(e) Maximum row of 99–299 l/s and the 10.4 bar(e) Maximum row of 192–267 l/s show the same ceiling narrowing as the pressure rises.

The ZT 110 VSD⁺ Pack and Full Feature Numbers

On the dual NEOS drive the ZT 110 VSD⁺ is published both as a Pack unit and as a Full Feature (iMD) build with the rotary drum dryer inside the same canopy. Both carry the 10.4 bar(e) class, and the table keeps every point of each build side by side so the difference at the low end is visible in one place.

The Pack build weighs 2795 kg on a 3400 mm frame; the Full Feature (iMD) build extends that length to 4085 mm and the mass to 3445 kg. Both stand 1660 mm wide and 2000 mm high. The ZT 110 VSD⁺ reads 66 dB(A) at the work station, against the 79 dB(A) group figure on the single-inverter VSD.

Reading the two tables together shows what the VSD⁺ changes. The VSD 10.4 bar(e) Minimum point starts at 6.5 bar(e) and 166 l/s, whereas the ZT 110 VSD⁺ Pack starts at 4 bar(e) and 79 l/s, so the dual-drive machine keeps regulating well below the flow where the single-inverter version reaches its lower limit. At the top end the VSD Maximum is 192–267 l/s and the ZT 110 VSD⁺ Pack Maximum is 76–269 l/s, so the ceiling stays close while the bottom of the band opens up. That wider turn-down is the reason plants with a deep night-shift trough tend to specify the VSD⁺ rather than sizing a larger fixed speed machine and letting it unload.

What the Integrated Dryer Changes

Full Feature (iMD) adds a rotary drum adsorption dryer inside the canopy. The drum divides its surface between the sector that dries the compressed stream and a regeneration sector fed by hot compressed air, so treated air leaves the package continuously without a separate desiccant tower row and without purge air being vented from the machine. Piping and wiring between the compression section and the dryer are completed before delivery, which leaves the site with the air main, the power supply, and the cooling-air duct to connect.

On the ZT 110 VSD⁺ the dryer also moves the low end of the envelope. On the Pack the ZT 110 VSD⁺ Minimum starts at 4 bar(e) and 79 l/s; on the Full Feature (iMD) build it starts at 6 bar(e) and 89 l/s, because regeneration needs a minimum swept volume before the dew point can be held. A plant whose quiet-shift demand falls below that 89 l/s floor should work from the Pack table instead. Supervision runs on the Elektronikon Touch controller, which schedules service intervals, raises warnings before they turn into trips, and shows the condition of the package over the network.

Service items sit behind panels on one side of the frame, so a technician works from a single position during a stop and the canopy does not have to be walked around.

Air Cooling Without a Water Circuit

Compression heat leaves the ZT 110 VSD through a cooler block fed by ambient plant air rather than a water loop. There is no cooling tower, no water treatment, and no freeze protection to maintain, and the plant takes the rejected heat into its own ventilation. The 66 dB(A) VSD⁺ figure and the 79 dB(A) VSD group figure are both measured with the cooling-air ducting on the outlet grating included, which is the condition the machine actually runs in. That acoustic result is what allows the ZT 110 VSD to stand beside the process it feeds rather than in a separate compressor house, and it removes the pipe run that a remote installation would add.

Sizing the ZT 110 VSD to the Plant

Sites that need Class 0 air but have no water infrastructure are the natural fit for the ZT 110 VSD: food and beverage filling halls, electronics assembly, and textile finishing lines. At 110 kW (150 hp) the ZT 110 VSD frequently replaces a pair of smaller fixed speed oil-free machines, which removes one set of service items and the cascade control between them. The 8.6 bar(e) class suits a 7 bar(e) header that spends long periods at part load, while the 10.4 bar(e) class suits a header held at a higher setpoint.

Where the specification calls for treated air at the outlet, the ZT 110 VSD⁺ Full Feature build takes an entire installation step out of the project and leaves one supplier responsible for the whole package.

Questions Buyers Ask About the ZT 110 VSD

Which working pressure class should I choose for the ZT 110 VSD?

Use the 8.6 bar(e) class for a 7 bar(e) header that often runs at part load: its Minimum point opens at 4 bar(e) and 101–320 l/s. Choose the 10.4 bar(e) class when the header setpoint is higher; its Minimum point opens at 6.5 bar(e) and 166–292 l/s.

Why does the Full Feature table start at a higher flow?

The integrated dryer needs a minimum swept volume to regenerate. On the ZT 110 VSD⁺ the Full Feature (iMD) Minimum starts at 6 bar(e) and 89 l/s, while the Pack Minimum starts at 4 bar(e) and 79 l/s.

How much floor length does each build need?

The ZT 110 VSD⁺ Pack frame is 3400 mm long at 2795 kg. The Full Feature (iMD) frame is 4085 mm long at 3445 kg. Both are 1660 mm wide and 2000 mm high.

Does the ZT 110 VSD have a 13 bar(e) variant?

The published 13 bar(e) table in this family belongs to the water-cooled ZR 110 VSD⁺. The ZT 110 VSD data covers 8.6 and 10.4 bar(e) on the VSD and 10.4 bar(e) on the ZT 110 VSD⁺.

What is the turn-down at 9 bar(e)?

At the 9 bar(e) / 130 psig point the ZT 110 VSD⁺ Pack is published at 78–292 l/s and the Full Feature (iMD) build at 87–292 l/s, so both hold the same upper flow with different low-flow floors.

Can the ZT 110 VSD stand next to the production line?

Yes. The 66 dB(A) VSD⁺ work station reading and the 79 dB(A) VSD group figure are measured with the cooling-air ducting fitted, and neither calls for an isolated room.

Where the ZT 132 VSD Takes Over

Once the profile needs more than the 339 l/s ceiling of the ZT 110 VSD⁺, the next air-cooled step is the Atlas Copco ZT 132 VSD (FF VSD⁺) Oil-free Air Compressor in the 132 kW (175 hp) class. Send us the model you are working from and the working pressure at the header, and we will confirm which ZT 110 VSD branch applies before we quote the build that fits.