Hitachi NEXT Series Instruction Manual page 71

Flow diagram (Fixed speed type)
Compressed Air Flow and Oil Flow
Air exhaust
6
19
52
14
13
15
Intercooler
condensate
drain
24
23
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 Orifice
14 Drain Solenoid
15 Y strainer
16 Drain trap
17 Demister
18 Motorized Isolation Valve
19 Hi-Precooler (only for 125 psi (0.86 MPa type))
20 Drain separator
8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow]
Air-Cooled
Air exhaust Air exhaust
7
8
51
54 36
2
TH3
20
TH2
17
32
PS1
11
TH5
1
TH4
PS4
22
31
21
Compressed air flow
Capacity Control & Blowoff Air Flow
21
22
23
24
31
32
33
34
35
36
38
39
51
52
53
54
34
PS2
9
35
3
4
MOHR
5
33
15
14
13
Aftercooler condensate drain
Lubricating oil flow
Air Intake Filter
Suction Throttle Valve
Blowoff Valve
Blowoff Silencer
Oil Flow
Oil Strainer
Oil Pump
Oil Relief Valve
Oil Cooler
Oil Filter
Temperature Control Valve
Oil Drain Valve
Oil Mist Remover
Air Flow and Other
Fan Motor
Enclosure
Air Intake Duct
Cooling fan
18
10
M
Compressed
air discharge
Air intake for
main motor
39
Control air for OMR
Legend of Sensors and Switches
Symbol Part name
PS2 Pressure Sensor (discharge air pressure)
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)
Thermostat (for main motor
MOHR
bearing temperature)
Pressure Differential Sensor (For
63SV
suction filter clogging detection)
69