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Vol. 2.6 © 2020 Hanbell Precise Machinery Co., Ltd. All rights reserved
2.5 Connections
2.5.1 Suction/discharge/economizer flange size
Figure 2.2 Flange size
Position
Size
A
B
D
E
F
G
Piping
thick
(JIS)
(GB)
(GB)
RT-120~140
RT-111
Suction
8"
218
221.5
305
350
30
12
25
11
Discharge
6"
167
170.5
260
305
28
12
25
10.5
Mid.-press.
(Eco.)
2 1/2"
77.5
77.5
140
175
20
8
19
7
RT-160~280
RT-161, RT-221
Suction
12"
320
327.5
430
480
36
16
27
14
Discharge
8"
218
221.5
305
350
30
12
25
11
Mid.-press.
(Eco.)
4"
116
116
185
225
24
8
23
8.5
Remarks
※
Material-standard JIS 20 kg/cm
2
g steel unit: mm
※
thickness must be equal to the standard or larger
Table 2.5 Flange dimensions
Note
：
1. Please weld steel pipes onto flanges by butt-welding and make sure debris has
been cleaned, otherwise the compressor might be damaged badly during running.
Flow velocity in the discharge side of the compressor could be as high as
15~20m/sec. High-speed discharge gas will make noise in discharge connection.
In order to decrease the noise level, it’s recommended to round sharp edges of
joints of piping.
