Operation Limits - mycom UD Series Instruction Manual

2.3.2

Operation Limits

Table 2-4 Operation Limits of UD-series Screw Compressors
I t e m
Maximum discharge pressure
Maximum suction pressure
Minimum suction pressure
Minimum differential pressure
between discharge pressure and
suction pressure
Maximum oil supply pressure
Minimum oil supply pressure
Maximum suction temperature
Minimum suction temperature
Maximum discharge temperature
Maximum oil supply temperature
Minimum oil supply temperature
Maximum M rotor rotation speed
Minimum M rotor rotation speed
Applications
Note 1: Unless otherwise noted, the pressure unit MPa represents the gauge pressure in this manual.
Note 2: The oil supply pressure of the capacity control part (control hydraulic pressure of the unloader
slide valve), the value of the forced oil supply pressure is applied.
Note 3: When it is required that pressure difference between Pd (discharge pressure) and Ps (suction
pressure) should be not greater than 0.49 MPa, oil pump needs to be installed.
If a combination of "NH
lubricating oil, oil pump must be installed.
Note 4: Please contact us when using it for gas pressure.
UD-series Screw Compressors
Chapter 2 Compressor Specifications and Structure
MPa 1.96 (Other than 320LL, 400LL, 400XL)
MPa
MPa
MPa
MPa
MPa
°C
°C
°C
°C
°C
-1
min
min -1
R407C, R407F, R410A, as same as J and gas
+ compatible oil (PN46)" is used for working fluid (refrigerant) and
3
2-5
O p e r a t i o n L i m i t
1.37（320LL,400LL,）
0.60（400XL）
0.59
-0.080
0.49
Forced oil supply
Pd + 0.39
Forced oil supply
Pd + 0.049
85
-60
90
60
30
4500 (320*UD, 400*UD are 3600)
1450
NH , R134a, R404A, R507A
3
Propane, propylene, CO2
compressor for other gases
2.3 Compressor Specifications