2205B0JE-DA-J-N_2014.05.
2 Structure and Specifications of the Compressor
Screw Compressor J-series
2.1 Features of the J-Series Screw Compressor
2-1
2
Structure and Specifications of the Compressor
2.1
Features of the J-Series Screw Compressor
The J-series is a high-performance and sophisticated single-stage screw compressor with the following
features: a new rotor profile utilizing
’s advanced technology (J profile); a variable Vi
(internal volume ratio) mechanism that operates with various conditions; the compressor can operate
with various types of refrigerants; and high design pressure of 3.5 MPa and flexibility of a wide range of
operation conditions in various applications.
High
Efficiency
The compressor is highly efficient because it utilizes
’s new “J” rotor profile.
The continuous capacity control system makes operation economical by matching the fluctuation in
load.
Efficiency is not affected by variations in operation conditions because of the variable Vi control
system.
High
Reliability
The J-series has extended the operating time without overhaul because of the following features.
A new rotor profile that reduces the bearing load, radial sleeve bearings specially designed with
’s original technology and special high-load capacity thrust ball bearings.
The J-series achieves an improvement of reliability because the design pressure is higher than the
standard model, O-rings are used for sealing between casing and the bellows type mechanical seal
are adopted for shaft seal.
Easy Packaging due to Integrated Functional Devices
The 170J/220J series has an integrated suction check valve, a mounted hydraulic solenoid valve
for capacity control and variable Vi control, and is coupled with flange motors in the standard.
These features make packaging design easier.
Less
Vibration/Noises
The new rotor profile along with other various design considerations have reduced noise and
vibrations further.
2.2
Model Designation of the Compressor
The meaning of the type designation stamped on the nameplate of the compressor MODEL column is
as follows.
*
170
*
-
V
Means variable Vi of the discharge port (volume ratio)
Shows the rotor length of S, M, L
Shows the rotor diameter of 170, 220, 280
When there is specification, working fluid is shown by the symbol
(Example: N = ammonia, F = Freon, P = Propane )
