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HYDRAULIC SCREW COMPRESSORS
OPERATING PRINCIPLES
Picture 6: Operating description: Air output, oil filtering and cooling
5. The air-oil mixiture flows to the air-oil separating element where the oil is
filtered out down to a residual content of < 3 mg/m
3
.
6. Compressed and filtered air continues from air-oil separating element to the air
supply system through minimum pressure valve and AP-port.
7. Depending on the oil temperature, the oil thermostat valve routes the oil
flow through the oil cooler or directly to the oil filter. Optimum operating
temperature of oil is adjusted by integrated thermostat valve.
8. The oil flows from the oil filter to various injection points in the compressor
block.
When air supply line is closed and preset air pressure is reached, compressor starts
to run automatically in off-load mode. Pneumatically controlled intake valve is
closed and compressor’s internal pressure drops to 5.5 bar. Pressure in supply line
remains until supply line is opened.
When the compressed air in air supply line is needed, off-load automatic controls
the intake valve according to the current air demand.
Summary of Contents for HKR 1300
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