Hitachi NEXT Series Service Manual page 8

Oil-free screw compressor
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2.1.2
Air-Cooled
Compressed Air Flow and Oil Flow
Air exhaust
6
19
23
24
52
22
22
23
TH3
20
14
17
13
15
Intercooler
condensate
drain
63SV
53
Air intake for
compressed air
Oil drain
Oil drain
38
Cooling air flow
Legend of the Diagram
Compressor Air Flow
1
1st-Stage Airend
2
2nd-Stage Airend
3
Gear Case
4
Step-up Gear
5
Main Motor
6
Intercooler
7
Check Valve
8
Aftercooler
9
Air Relief Valve
10
Discharge Port
11
Check Valve
13
Orifi ce
14
Drain Solenoid
15
Y-type Strainer
16
Drain trap
17
Demister
18
Motorized isolation valve
19
Hi-Precooler (only for 125 psi (0.86 MPa type))
20
Drain separator
Air exhaust Air exhaust
7
8
51
36
54
2
TH2
32
PS1
TH5
11
1
TH4
PS4
31
21
Compressed air flow
Capacity Control & Blowoff Air Flow
21
Air Intake Filter
22
Blowoff Solenoid Valve (1)
23
Blowoff Solenoid Valve (2)
24
Blowoff Silencer
31
Oil Strainer
32
Oil Pump
33
Oil Relief Valve
34
Oil Cooler
35
Oil Filter
36
Temperature Control Valve
38
Oil Drain Valve
39
Oil Mist Remover
Air Flow and Other
Fan Motor
51
52
Enclosure
53
Air Intake Duct
Cooling fan
54
34
PS2
9
35
3
4
THM
5
33
15
14
13
Aftercooler condensate drain
Lubricating oil flow
Oil Flow
6
18
M
10
Compressed
air discharge
Air intake for
main motor
39
Control air for OMR
Legend of Sensors and Switches
Symbol
Part name
Pressure Sensor (discharge air pressure)
PS2
PS4
Pressure Sensor (oil pressure)
PS1
Pressure Sensor (interstage pressure)
TH2
Temperature Sensor (2nd-stage in)
TH4
Temperature Sensor (1st-stage out)
TH3
Temperature Sensor (2nd-stage out)
TH5
Temperature Sensor (oil)
Temperature Sensor (for main
THM
motor surface temperature)
Pressure Differential Sensor (For
63SV
suction filter clogging detection)

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