Intended Use; Description; Type Key; Technical Characteristics - Samson NESE Manuel D'installation Et Mise En Service

ENGLISH
Lifting a pumpset :
4 INTENDED USE
NESE pumps are used to handle overheated water.
The specific design of pump bearing bracket makes it possible to use a
standard mechanical seal and avoid the use of an expensive auxiliary
cooling device for the bearing bracket and the mechanical seal.
Those pumps are used in processes whith overheated water at a
nominal pressure of 40bars.
5 DESCRIPTION
5.1 TYPE KEY
Pump description is engraved on pump name plate. It gives a
general description of pump design. The nameplate is attached to
pump bearing bracket.
Description of a NESE pump is created as follows :
Example : NESE50‐32‐160‐MCJ‐42‐T0,55/4K‐2D‐X
NESE Pump product line
50 Nominal diameter of suction flange [mm]
32 Nominal diameter of discharge flange [mm]
160 Nominal diameter of impeller [mm]
M Material used for casing and casing seal
C Mechanical seal type
J Mechanical seal faces and O'Ring
4 Ball bearing type
2 Elastic coupling model for pump set
T Type of electric power supply
0,55 Installed power P
4 Number of pole
K Motor option
2D ATEX option
X Specificity
Detailed technical features of the product are described in
acknowledgment of order or upon request to SALMSON Customer
Department.
5.2 TECHNICAL CHARACTERISTICS
5.2.1 MATERIALS
Material
 Casing : cast iron (EN‐GJS‐400‐18‐LT) ‐ Sizes 65‐315, 80‐315 and 100‐
315 (cast steel GP240 GH)
 Casing cover : cast iron (EN‐GJS‐400‐18‐LT)
 Intermediate flange : cast iron (EN‐GJS‐400‐18‐LT)
 Shaft: steel (X20Cr13 – AISI420)
 Shaft sleeve : stainless steel (316Ti)
[KW]
2
 Impeller : cast iron (EN‐GJL250)
 Bearing housing : cast iron (EN‐GJS‐400‐18‐LT)
 Bearing : SiC/SiC
Sealing
 Casing seal : graphite stainless steel reinforced flat gasket.
 Shaft sealing : single balanced mechanical seal with unprotected spring
SiC /Carbon /EPDM.
5.2.2 PERFORMANCE AND OPERATING LIMITS
5. 2. 2. 1 TEMPERATURE
NESE pumps are designed to handle overheated water from 170°C to
230°C. Running time at a temperature lower than 170°C should be
limited to the necessary time needed to reach working temperature.
Thanks to the bearing bracket design, the fluid temperature in the
mechanical seal chamber is limited to 220°C max.
5. 2. 2. 2 PRESSURE
Maximum working pressure is 35bar up to 200°C and 32bar above
200°C.
Hydrostatic test pressure : 52bar
Bearing bracket design includes a prestressed axial thrust bearing (4
point contact ball bearing) to bears heavy axial loads even at 2900RPM.
Ensure a minimum pressure of 8 bars in the loop to ensure proper
lubrication of the internal silicon carbide bearing and to avoid
degassing in MS chamber.
8
4
contact ball
bearing
points