Chapter 2
Compressor Specifications and Structure
UD-series Screw Compressors
2.2 Model designation of the Compressor
2-2
2.2
Model Designation of the Compressor
The meaning of the type designation, which is engraved on the MODEL column of the compressor
nameplate, is as follows.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
F
200
L
UD
-
M
E
[1] Working fluid
NH
3
, R134a, R404A, R507A
Propane, propylene, CO2
R407C, R407F, R410A
[2] Rotor diameter
Symbol
125
160
200
250
320
400
[3] Rotor length
Symbol
L/D
Remarks
S
1.10
M
1.38
No setting for rotor diameter 125
L
1.65
LL
1.95
Rotor diameter 320, 400
XL
2.20
Rotor diameter 400 only
[4] Discharge direction
Symbol
Discharge direction
Remarks
UD
Sideway
[5] Short cut rotors
Symbol
Specification
No symbol
Standard
S
Short cut rotors
1) Shortcut rates of 5 %, 7 % and 11 % in principle.
2) It cannot be used at H port.
