Operation Of The Compressor - Hertz HGS 2-15 Operator's Handbook Manual

4.3 OPERATION OF THE COMPRESSOR

6
B
9
20
4
10
7
3
2
A
15
14
11
5
8
16
19
12
1
B
18
17
R
U
A
E
R1
The electric motor of compressor (1) rotates airend unit (2).
Airend unit absorbs the air passing from pilot intake section of the intake valve (3) and sends it
to separator tank (5) after mixing with oil. This way pressure inside separator tank (internal
pressure) starts to rise.
When the internal pressure comes to a reasonable level suction valve fully opens and
compressor is loaded (20).
Minimum pressure valve (7) does not send the internal pressure to use until it becomes to 3-4
bar, keeps inside separator tank.
When internal pressure starts to exceed 3,5-4 bars, minimum pressure valve can not
overcome the internal pressure and air production is started by opening the way.
Separator filter (6) atop of the separator tank separates the compressed oil/air mixture from
each other.
The separated air passes through minimum pressure valve and comes to the after cooler side
of combicooler (11).
The oil inside the separator tank comes to the thermal valve by the effect of internal pressure.
Thermal valve (17) does not let the oil to flow through the cooler until the oil temperature
reaches the specific value. In this case; oil goes from separator tank directly to oil filter (9) and
from there to airend unit. When the oil temperature reaches the required value (71-85 °C);
thermal valve closes the line in between separator tank and oil filter. And it ensures the oil to
flow into cooler side of combicooler (8). After cooling process, oil sent to oil filter, then, the
filtered oil is again sent to screw oil inlet and lubrication cycle continues.
The fan on the compressor (18) ensures the flow of cooling air absorbed from environment to
cooler. The cooler is composed of two parts; one for air and one for oil. This way oil and air
are separately cooled in respective sections.
The air absorbed by compressor is filtered twice. When the fan sends the cooling air into
compressor, the absorbed air is cleaned by air panel filter (19). The air absorbed by airend is
filtered again while passing through intake filter (4)
Small quantity of oil leaks into separator filter during operation. This leakage is sent back to
system by oil return line (scavenge) (10).
In order for establishing pressure safety inside separator tank, safety valve (14) provides
safety for future failure situations.
The oil is supplied in the compressor by removing the oil tap (15) on compressor chassis. The
old oil is discharged by discharge valve (16) under separator tank.
13