Leading Particulars; General Description - Atlas Copco XRHS 506 Instruction Manual

2

Leading particulars

2.1

General description

The XRHS 506 - XRHS 1100 CD6 is a silenced, two-stage, oil-injected screw compressor, built for
a nominal effective working pressure of 20 bar (290 psi).
The XRVS 476 - XRVS 1000 CD6 is a silenced, two-stage, oil-injected screw compressor, built for
a nominal effective working pressure of 25 bar (363 psi).
Engine
•
The compressors are driven by a liquid-cooled diesel engine.
The engine's power is transmitted to the compressor element through a heavy-duty coupling.
Compressor
•
The compressor casing houses two screw-type rotors, mounted on ball and roller bearings. The
male rotor, driven by the engine, drives the female rotor. The compressor delivers pulsation-free
air.
Injected oil is used for sealing, cooling and lubricating purposes.
Compressor oil system
•
The oil is boosted by air pressure. The system has no oil pump.
The oil is removed from the air, in the air/oil vessel at first by centrifugal force, secondly through
the oil separator element.
The vessel is provided with an oil level indicator.
Regulation
•
The compressor is provided with a continuous regulating system and a blow-off valve which is
integrated in the unloader assembly. The valve is closed during operation by air receiver
pressure and opens by air receiver pressure via the compressor element when the compressor is
stopped.
When the air consumption increases, the air receiver pressure will decrease and vice versa.
This receiver pressure variation is sensed by the regulating valve which, by means of control air
to the unloader and an electronic engine speed regulator, matches the air output to the air
consumption. The air receiver pressure is maintained between the pre-selected working pressure
and the corresponding unloading pressure.
• Cooling system
The engine is provided with a liquid-cooler and intercooler and the compressor is provided with
an oil cooler. (For available options see chapter 7 Available options.)
The cooling air is generated by a fan, driven by the engine.
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Instruction Manual
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