Atlas Copco Oil Free Screw Air Compressors ZT/ZR 55-90(VSD)(FF) Energy Safe

Oil-free rotary screw compressors

ZR/ZT 55-90 (VSD) (FF)

Setting the standard in energy efficiency, safety and reliability
The shortest route to superior productivity is to minimize operational cost while maintaining an uninterrupted supply of the right quality of air. The Atlas Copco Z compressor series is focused on effectively saving energy, ensuring product safety – only oil-free machines exclude contamination risks for 100% – and guaranteeing the utmost reliability around the clock. And not just today, but day after day, year after year, with minimal maintenance cost, few service interventions and long overhaul intervals.

Advantage:

Pioneering the development of oil-free air technology

The ISO 8573-1 CLASS 0 certification means, zero risk of our products contaminating the compressed air. This means we won't damage your company’s hard-won professional reputation due to oil contamination from our oil-free products.

Maximum energy efficiency
The ZR/ZT’s superior oil-free screw elements provide the optimum combination of high Free Air Delivery (FAD) with the lowest energy consumption. Ample sized cooling, low pressure drops and an extremely efficient drive train result in the highest compressor package efficiency.

The most complete package

With the ZR/ZT compressor, Atlas Copco provides a superior solution without hidden costs. The totally integrated, ready-to-use package includes internal piping, coolers, motor, lubrication and control system. The Full Feature version even integrates an IMD adsorption dryer for an impeccable end product. Installation is fault-free, commissioning time is low and no external instrument air is required. You simply plug and run.

Global presence - local service

Our aftermarket product portfolio is designed to add maximum value for our customers by ensuring the optimum availability and reliability of their compressed air equipment with the lowest possible operating costs. We deliver this complete service guarantee through our extensive service organization, maintaining our position as leader in compressed air.

Optimize your system
With the ZR/ZT, Atlas Copco provides an all-in-one standard package incorporating the latest technology in a built to-last design. To further optimize your ZR/ZT's performance or to simply tailor it to your specific production environment, optional features are available.

Flowchart
Process flow, oil flow and cooling flow - step by step

1. Filtration & first compression

The light blue flow represents the air. Air is drawn into the compressor through the inlet filter where the air is cleaned. Then passes through the throttle valve with integrated blow off valve that takes care of the load unload regulation.
In the first compression stage the air pressure is raised to the intermediate pressure after which the air is cooled down in the inter-cooler.

2. Cooling & second compression

After the inter-cooler the air passes through a moisture separation system before entering the high pressure stage. In the high pressure stage the pressure is brought to the final pressure.

3. Cooling & drying

The air at the outlet of the high pressure stage is split in two parts. One part goes via the pulsation damper with integrated check valve to the after-cooler where it is cooled down and moisture is separated and evacuated. A second part goes directly to the regeneration area of the heat compression MD dryer.
In the regeneration area of the dryer the hot air regenerates the adsorption drum after which it passes through the regeneration cooler where it is cooled down and moisture is separated and evacuated. The cold air coming from the regeneration section is then mixed with the cold air from the after-cooler in the nozzle-ejector system before passing through the drying section of the adsorption drum where the moisture is removed. Dry air leaves the compressor through the outlet connection flanges.

4.Oil flow

The yellow flow is the oil path within the compressor where the oil pump sucks oil from the oil sump and pumps it through the oil cooler and a high efficiency filter to give cool clean oil to the bearings and the gears; then the oil flows back to the gear casing.

Technical specifications
Data from the ZRZT 55-90 (VSD) (FF)