ABAC Tech ATF on a receiver: a complete assembly
ABAC Tech ATF · 270 l · oil-freeAn oil-free airend needs an air reserve just like any other piston compressor — without one the motor would cut in over and over. The ATF-4-270FT has that reserve right underneath it: it is the same four-kilowatt airend without a drop of oil as in the basic version, only mounted on a horizontal receiver of 270 litres. It delivers 396 l/min at 10 bar, the motor is four-pole in duty type S1, that is a 100% duty cycle, and it starts directly, without a star-delta sequence. The machine arrives assembled: receiver, airend, control box and pressure switch on one base.
Three things that decide
This branch of the ABAC Tech range holds one complete assembly. It is oil-free, single-stage for 10 bar, direct driven and runs on a three-phase 400 V supply. Before you order it, three points are worth going through.
1. How much air do you really use?
What matters is the delivery at 10 bar, not the intake — that is the air which actually reaches your tools or your process. This machine delivers 396 l/min and may run continuously while doing so. Work with the average consumption per shift; the receiver underneath covers short peaks.
2. Is 270 litres of reserve enough for you?
A receiver is not output, it is a reserve for peaks in demand. Two hundred and seventy litres makes sense where the draw comes in bursts — several tools at once, longer blowing, sandblasting — because the motor then cuts in less often. With a steady draw the delivery decides and the receiver merely smooths it out.
3. A complete assembly, or will you build one yourself?
Here you get the receiver, the airend and the control box on one base, and the machine only has to be placed and connected. If your receiver is already installed or you need the compressor somewhere else than the air reserve, take the basic version without a receiver: the same airend on a frame weighs 80 kg instead of 150 and can be anchored anywhere.
How to read the machine code
The code ATF-4-270FT has four parts: ATF is the oil-free range (the letter F stands for free of oil), 4 is the motor input in kilowatts, 270 the receiver volume in litres and the letters at the end define the version.
F — stationary on a receiver
The machine sits on a horizontal receiver that doubles as its base. It stands on feet, needs no anchoring to the floor and no further structure.
T — three-phase 400 V supply
The whole range runs on 400 V / 50 Hz. An industrial four-pole S1 motor cannot be plugged into an ordinary socket and nobody should try.
No X — direct starting
The code has no X, so the motor starts directly, without a star-delta sequence. At four kilowatts an ordinary supply handles that; star-delta appears on the stronger machines of the range.
Why an oil-free airend is different
In an ordinary piston compressor the oil does two jobs at once: it lubricates the rings against the cylinder and carries heat away. Leave it out and the materials themselves have to cope. ATF therefore uses nickel-plated aluminium cylinders and Teflon-coated pistons, a stainless steel valve plate and crankshaft bearings filled with grease at the factory for their whole service life — the lubricant is sealed where the compressed air never passes.
Cooling then does what oil does elsewhere: V-arranged cylinders with heavy finning and a large fan blowing air straight onto the heads. The airend runs at a low 1,500 rpm and sits directly on the motor, without belts. The same airend comes in six more sizes in the ATF range, from 1.5 to 7.5 kW, in the version without a receiver.
The machine in this category
ABAC Tech ATF compressors on a receiver — oil-free, S1 100 %, 10 bar, 270 l receiver, 396 l/min delivered | ||||||||
|---|---|---|---|---|---|---|---|---|
| Model | Receiver | Starting | Input | Intake | Delivery at 10 bar | Lwa / Lwp | Weight | Dimensions |
| ATF-4-270FT | 270 l | direct | 4 kW | 918 l/min | 396 l/min | 103 / 83 dB(A) | 150 kg | 1,629 × 606 × 1,151 mm |
Delivery is the amount of air the machine actually supplies at a working pressure of 10 bar; intake is the volume the airend draws in. Lwa is the sound power level from the rating plate, Lwp the sound pressure level at a distance of four metres. Dimensions are length × width × height. All values are manufacturer data.
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Noise without window dressing
The machine is loud and there is no point hiding it: the sound power level Lwa is 103 dB. It is an open industrial airend with no enclosure at all, designed for output and heat removal, not for quiet in the room. It belongs in a plant room, an annex or behind a wall, not next to a workbench.
🔴 Be careful when comparing offers. Catalogues often quote 83 dB for the same machine — but that is the sound pressure Lwp measured at four metres, roughly 20 dB(A) below the sound power Lwa on the rating plate. Both figures are correct, each simply measures something different. When the machine has to stand where people work, the answer is the sound-insulated ATFS range.
The airend up close
Above the receiver sits the same oil-free airend the ATF range also offers without a receiver.
What the assembly includes
Horizontal 270 l receiver
The pressure vessel doubles as the base of the whole machine. It stands on feet and has a drain valve for the condensate.
Oil-free 4 kW airend
Two cylinders in a V, nickel-plated aluminium cylinders and Teflon-coated pistons. There is no lubricant in the compression chamber.
S1 motor at 100 % duty
A four-pole motor rated for continuous load. It needs no cooling breaks.
Control box and pressure switch
The electrical equipment is fitted and wired at the factory — the machine only has to be placed and connected to the supply.
Direct drive without belts
The airend sits directly on the motor. No belt tensioning and no belt replacement.
Stainless steel valves
A stainless valve plate takes high temperatures and the cyclic load of continuous duty.
Two-year warranty
A two-year warranty applies to the machine.
Ventilek recommends
A complete assembly saves work, but not space. This machine arrives assembled — no anchoring of the airend, no pipework to the receiver, no mounting of the pressure switch. In return it takes up a metre and a half of length and weighs a hundred and fifty kilos. If your plant room is small or you want the compressor somewhere else than the air reserve, an airend without a receiver plus a separate vessel works out better. And count on water: oil-free air is free of oil, not of moisture — the condensate has to be drained from the receiver regularly.
Frequently asked questions
- What exactly does S1 mean and why does it matter?
- S1 is the standard designation of a motor duty type: the machine may run continuously at full output as long as it is cooled. Small oil-free compressors usually have S3, which means that after a certain running time a cooling break has to follow — usually roughly half and half. Leave an S3 machine running non-stop and it will overheat, cutting its life to a fraction.
- Is the air from an ATF really completely oil-free?
- From the compressor, yes — there is no lubricant in the compression chamber that could reach the air. That does not mean the air is free of water and dust: the humidity drawn in condenses in the compressed air and collects in the receiver, from where it is drained. Sensitive processes therefore need a dryer and filtration downstream.
- Why does the table show delivery instead of intake?
- Because delivery is the air that actually reaches the tools at a working pressure of 10 bar. Intake is the volume the airend draws in — here 918 l/min against 396 l/min delivered. Delivery decides the choice of machine; we list both so it is clear which is which.
- How big a receiver do I actually need?
- The volume is chosen according to the peak demand, not according to the compressor output. With a steady draw a small vessel is enough and the delivery decides; with demand in bursts it is the larger vessel that holds the pressure and saves the motor from cutting in. Two hundred and seventy litres is a common middle choice for an airend of this size in industry.
- Is it really that loud?
- Yes. The sound power Lwa is 103 dB, which is what an open industrial machine without an enclosure sounds like. The figure of 83 dB that appears for these machines is the sound pressure at four metres — a different quantity, roughly 20 dB(A) lower. If you need a machine for a room where people work, look for a version in a sound-insulated enclosure.
- Does the machine have to be anchored to the floor?
- No. The assembly stands on the feet of the receiver and needs no anchoring; what matters is a level floor and space around the machine so the fan has somewhere to draw air from. To keep vibration out of the building structure, set it on anti-vibration mounts.
- Can the machine run on 230 V?
- No. The machine runs on a three-phase 400 V / 50 Hz supply. It starts directly, so matching protection is all it needs; star-delta starting appears on the stronger machines of the range.
Where to go next
This branch of the ABAC Tech range is the complete assembly on a receiver. The other branches look like this: You will find an overview of every range in the Compressors category.
- ATF without a receiver — seven oil-free airends from 1.5 to 7.5 kW — bare unit or on a base frame
- Sound-insulated ATFS range — oil-free air in a sound enclosure, for when the machine has to stand in the workshop
- Oil-lubricated ATL on a receiver — the same assembly with oil lubrication — 90 and 270 litres and a slightly higher delivery
- Every oil-free machine — from small workshop machines to dental and laboratory versions across brands
- High-pressure ATH range — when ten bar is not enough — 15, 20 and 30 bar
- How to choose a compressor — from the consumption of your tools through output to the size of the receiver
Performance data are measured to ISO 1217, Annex C, latest edition; noise to ISO 2151. Under the European machinery directive the sound power level Lwa is stated on the machine rating plate, while the sound pressure level Lwp is measured at a distance of four metres and is roughly 20 dB(A) lower. All values are manufacturer data.
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A complete assembly: an oil-free airend mounted on a horizontal pressure vessel that doubles as its base. The machine arrives assembled — it only has to be placed and connected.