Bitzer ST-140-3 Manuel D'utilisation page 51

Connection positions
5 Heat transfer fluid drain
6 Connection for pressure gauge
7 Connection for pressure relief valve
Internal thread 3/8-18 NPTF, external
thread 1 1/4-12 UNF
8 Sight glass
9 Oil drain
10 Vent plug
11 Lower fixing rails
12 Upper fixing rails
13 Heater connection
14 Measurement connection at heat transfer
fluid inlet
15 Measurement connection at heat transfer
fluid outlet
Dimensions, if specified, may have tolerances according to EN ISO 13920-B.
The legend applies to all water cooled shell and tube condensers, discharge gas desuperheaters, oil coolers and
all shell and tube evaporators. It includes connection positions that do not exist in every series.
Pipe connections of heat transfer fluid
Screw in pipes, making sure that the screwed nipples are not turned.
Joining thread (3) and (4): standard design internal thread (G..) or flange (DN..), sea water design nipple with in-
ternal thread (G..) or flange (DN..)
Oil cooler 1
Diameter
[mm (inch)]
OW401(B) 22 (7/8'')
OW501(B) 22 (7/8'')
OW781(B) 28 (1 1/8'')
OW941(B) 35 (1 3/8'')
Tab. 5: Dimensions for pipe connections of heat transfer fluid
Passes of heat transfer fluid
Depending on the reversing cover for the heat transfer fluid, the heat transfer fluid is passed through the pressure
vessel either 3 or 6 times. On the same reversing cover, it is possible to choose between 6 pass or 3 pass - de-
pending on the positions where the pipes for the heat transfer fluid are mounted.
Fig. 7: Heat transfer fluid pipe connections for OW781(B) .. OW941(B): 6 or 3 pass is possible at the same cover, depending on he connection
For further information see Operating Instructions of oil coolers: DB-510 .
ST-140-3 // PDF Download
2 3a
Diameter
[mm (inch)]
22 (7/8'') G 3/4
22 (7/8'') G 3/4
6 pass
28 (1 1/8'') G 1
35 (1 3/8'') G 1
3b 4a 4b
2 x G 3/4 G 3/4 G 1
2 X G 3/4 G 3/4 G 1
3 pass 6 pass 3 pass
2 x G 1 G 1 G 1 1/2
2 x G 1 G 1 G 1 1/2
5 9
Diameter
[mm]
- 10
- 10
G 1/4 10
(G 1/2)
G 1/4 10
(G 1/2)
51