salmson NOS Serie Installation Et Mise En Service page 19

ENGLISH
4.2 Construction and mode of operation
NOS pumps are horizontal, single-stage volute casing pumps with
nominal outputs and flange dimensions meeting EN 733 / DIN 24255.
Their back pull out construction allows the disassembly of the com-
plete bearing unit towards the drive side without removing the pump
casing from the pipework.
NOS pumps are preferably used when pure or turbid liquids, not
containing solid particles, are to be handled.
Impurities up to a grain size of 3 mm can be handled, but it will shor-
ten the service life.
4.3 Description
Type
Standard
Option
4.4 Example of long code
Norm pump code
ND discharge (mm)
Diameter max. impelller (mm)
Hydraulic version
Motor power (kW)
no specification = without motor
Motor 2 or 4 pôles
no specification = without motor
Technical definition code
4.5 Shaft seal
Depending on the application, different shaft sealing executions are
offered (see 4.3).
• A stuffing box with lantern ring or mechanical seals according to
DIN 24960 are fitted in the following cases:
If the pump draws from a suction line, If the pump is fed by a feed line
with a pressure of less than 0.5 bar or If the pumped liquid is at or near
its boiling point.
Pump
casing
EN GJL 250
5. PLANNING THE INSTALLATION
5.1 Piping system
Note the arrows on the pump branches indicating the direction of
flow.
- Choose the nominal width of the pipelines in accordance with the
- Flange sealing must not protrude on the inside.
- Ensure that the pipe work is clean before installing of the pump.
- Support the pipe work in order to avoid distortions at the pump
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NOTE: Chapter 4.3 contains the codes for all variations of
mechanical seals.
Impeller
material
EN GJL 250
G-Cu Sn 10
EN GJL 250
nominal width of the pump branches or larger ones with the cor-
responding reductions.
NOS 32 - 200 B - 0.75 - 4 - 05
Sealing type
Mechanical seal
MG12-G6-AQ1EGG
EPDM
Packing rings
Graphite + PTFE
Mechanical seal
MG12-G6-AQ1EGG
EPDM
Mechanical seal
MG12-G6-Q1Q1VGG
VITON