2202L5JE-DA-C5-N_2015.05.
2 Compressor Specifications and Structure
Compound 2-stage Screw Compressor
2.1 Overview of the MYCOM 1612LSC Speed Increaser Type
1612LSC
Speed Increaser Type
2-1
2
Compressor Specifications and Structure
2.1
Overview of the
Compound 2-stage
Screw Compressor 1612LSC Speed Increaser Type
The 1612LSC is a compound screw compressor integrating two stages of compressor
into a single body. The 1612LSC has been developed based on the LSC model of the 1612C Series
compressors —our most popular and long-selling products boasting the delivery of over 1000 units
worldwide since they were first put on the market— by adding the speed increaser gear system to
provide it with optimum performance for applications to ultra-cold and rapid freezing storage systems in
bonito and tuna fisheries.
Generally, screw compressors use oil injection to keep discharge temperature low during operation
without loss of volumetric efficiency even at high compression ratios, with singles-stage usage possible
even at evaporative temperatures near
−
40 °C.
However, for low-temperature regular usage, to improve KW/RT (the ratio of power consumption versus
cooling ability), a 2-stage compression method is used. To use standard-type screw compressors in a
2-stage compression method, at least two screw compressors must be combined so that there is a
high-stage and a low-stage, which requires multiple sets of machinery, power, and utilities, etc. to be
installed.
This 2-stage screw compressor combines these two units into one compound machine.
2.2
Model Designation of the Compressor
This manual describes the 1612LSC-*B*-52, -62, -53, -63, and -54 speed increaser type models.
The meaning of the type designation stamped on the nameplate of the compressor MODEL column is
as follows.
＊
1612LSC-
＊
B
＊
-52
（
62, 53, 63, 54
）
2, 3 or 4
：
Speed increaser gear ratio specification
( refer to the specifications table on the next page.)
5
：
Power frequency 50Hz
（
6
：
60Hz
）
Vi of the high-stage discharge port specification (volume ratio),
as standard
L
port or
M
port
Means the machine (low-stage) booster
Vi of the low-stage discharge port specification (volume ratio),
as standard
L
port or
M
port
Means two-stage machine single unit
Shows the specifications of the high-stage rotor length,
only
S
for accelerator speed increaser type
Shows the specifications of the low-stage rotor length, only
L
for speed increaser type
High-stage rotor
diameter of
125
Low-stage rotor diameter of
160
Means the working fluid
(Example: N = ammonia, F = Freon, P = Propane , HE = helium)
