Leading Particulars; Description Of Safety Pictograms Used In This Manual; General Description - Atlas Copco XAS96JD Instruction Book

2

Leading Particulars

2.1 Description of Safety Pictograms
Used in this Manual
ù ù
This symbol draws your attention to dangerous
situations. The operation concerned may
endanger persons and cause injuries.
+
This symbol is followed by supplementary
Information.
Fig. 2.1 General view of XAS 96 JD

2.2 General Description

The XAS 96 JD is a silenced, single-stage, oil-injected
screw compressor, built for a normal effective working
pressure of 7 bar( 102 psi).
— Engine
The compressor is driven by a water-cooled diesel engine.
The engine's power is transmitted to the compressor
through a flexible coupling and gear drive.
— 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 male
rotor has four lobes and the female rotor has six flutes.
Thus, the male rotor revolves at 1 1/2 times the speed of
the female rotor. The element 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 first
by centrifugal force, second through the oil separator
element. The vessel is provided with an oil level
indicator.
10
— Regulation
The compressor is provided with a continuous regulating system
and a blow-down valve which is integrated in the unloader
assembly. The valve is closed during operation by outlet pressure
of the compressor element and opens by air receiver pressure 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 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
Engine and compressor are provided with a radiator and oil cooler.
The cooling air is generated by a fan, driven by the engine.
— Safety Devices
A thermal shut-down switch protects the compressor against
overheating. The air receiver is provided with a safety valve.
The engine is equipped with low oil pressure and high coolant
temperature shut-down switches and an alternator V-belt
protection.
— Frame and Axle
The compressor/engine unit is supported by rubber buffers in the
frame.
The standard XAS 96 JD has an adjustable drawbar with a towing
eye.
— Bodywork
The bodywork has openings at the shaped front and rear end for
the intake and outlet of cooling air and specially hinged doors for
maintenance and service operations. The bodywork is internally
lined with sound-absorbing material.
— Lifting Eye
A lifting eye is accessible through the roof panel at the top of the
unit.
— Control Panel
The control panel grouping the air pressure gauge, control switch
etc., is placed behind a door at the front of the unit.
— Data Plate
The compressor is furnished with a data plate located on the cooler
plate showing the type, serial number, maximum final pressure
and normal working pressure.
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