2205B0JE-DA-J-N_2014.05.
2 Structure and Specifications of the Compressor
Screw Compressor J-series
2.3 Compressor Specifications
2-5
2.3.2 Operation
Limits
Table 2-4 Operation Limits of the J-Series Screw Compressor
I t e m
L i m i t va l u e
Maximum discharge pressure
MPa
3.2
Maximum suction pressure
MPa
1.0
Minimum suction pressure
MPa
-0.080
Minimum lubrication pressure
Po: Lubrication pressure, Ps: Suction pressure,
Pd: Discharge pressure
MPa
( Po - Ps )
≧
0.5
Forced oil supply system
MPa ( Po - Pd )
≧
0.05
Differential pressure oil supply system
MPa ( Pd - Po )
≤
0.15
Maximum suction temperature
°
C
50
Minimum suction temperature
°
C -60
Maximum discharge temperature
°
C 100
Maximum lubrication temperature
°
C
70 but, when using in the
explosion-proof area, it is 55.
Minimum lubrication temperature
°
C 20
Maximum rotation speed (M rotor)
min
-1
4500 (280J: 3600)
Minimum rotation speed (M rotor)
min
-1
1450
Refrigerant -
NH
3
, HFC, CO
2
, Propane
and Propylene
Note 1: Pressure unit [MPa] in the table 2-4 means gauge pressure.
Note 2: The J-series compressors must be used within the allowable operation range defined in the
table 2-4 and next page, Figure2-1.
When using J series in the explosion-proof area, use certainly in the condition with the
maximum suction temperature of equal to or less than 50 °C, the maximum lubrication
temperature of equal to or less than 55 °C (Refer to Note).
It is important specifically in the Application limits each clause eyes.
Note: When exceeding 55 °C, consult us for the further study because the maximum
lubrication temperature limitation is related to the atmosphere temperature, too.
