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Installation, Operating and Maintenance Instruction
The permitted application conditions and design
details of the delivered pump are shown in the
attached data sheet and / or order confirmation.
3.1.1 Designation scheme
The permitted application conditions and design
details of the delivered pump are shown in the
attached data sheet and / or order confirmation.
For example:
LS
200 - 500
S1
(0)
(1)
(2)
(3)
Position (0) - Model designation:
LS - Foot mounted casing design (12 / 16 bar)
LC - Foot mounted casing design (25 bar)
LCP - Casing feet centre line (25 bar)
Position (1) - Nominal diameter of discharge nozzle in
mm
Position (2) - Nominal impeller size in mm
Position (3) - Method of shaft sealing:
S1 - Single mechanical seal acc. EN 12756,
design K, form U (unbalanced)
S2 - Single mechanical seal acc. EN 12756,
design K, form B (balanced)
S4 - Single mechanical seal acc. EN 12756,
design K, form U (unbalanced), with Quench (with
throttle bush)
S5 - Single mechanical seal acc. EN 12756,
design K, form B (balanced), with Quench (with
throttle bush)
S6 - Single mechanical seal acc. EN 12756,
design K, form U (unbalanced), with throttle
(throttle bush) between pump and mechanical
seal chamber
S7 - Single mechanical seal acc. EN 12756,
design K, form B (balanced), with throttle (throttle
bush) between pump and mechanical seal
chamber
T3 - Single mechanical seal acc. EN 12756,
design K, form B (balanced), in dead-end-
configuration with extended throttle bush
D1 - Double mechanical seal back-to-back, 2
single mechanical seals acc. EN 12756, design K,
both form U (unbalanced)
D3 - Double mechanical seal back-to-back, 2
single mechanical seals acc. EN 12756, design K,
on fluid side form U (unbalanced), atmospheric
side form B (balanced)
C1/C2 - Cartridge mechanical seal on pump
sleeve
C3/C4 - Cartridge mechanical seal on the shaft
P1 - Packing without lantern ring
P2 - Packing with lantern ring, with barrier by
pumped fluid
P3 - Packing with lantern ring, with barrier by
external fluid
P4 - Packing with lantern ring, with flush
P5 - Packing without lantern ring, with external
cooling
Position (4) *) - Material of impeller:
N = Cast iron (0.6025)
S = Bronze (2.1050.01) - only at model LS
L = Ductil iron (0.7040)
LS 100-english
Artikel No. 771073402
N
L
1
2500
4
(4)
(5)
(6)
(7)
(8)
page 7
V = Stainless steel (1.4408)
W = Duplex stainless steel (1.4517)
F = Carbon steel (1.0619)
X = Other materials
Position (5) *) - Material of casing:
N = Cast iron (0.6025)
L = Ductil iron (0.7040)
V = Stainless steel (1.4408)
W = Duplex stainless steel (1.4517)
F = Carbon steel (1.0619)
X = Other materials
Position (6) - Shaft design:
1 - with shaft sleeve
2 - without shaft sleeve
Position (7) - Motor power in 1/10 kW
Only valid, if supplied (eg. 2500 = 250 kW)
Position (8) - Number of motor poles
Only valid, if supplied
*) Position (4) and (5) = Material-Code (eg. NL, VV,
WW aso.)
3.2 Shaft Sealing
Basically there are two kinds of shaft sealing: the
packing and the mechanical seal, whereas, there
again are many variants of both kinds. At the data
sheet and / or the order confirmation the shaft sealing
type of your pump is shown.
An instruction for the packing of a stuffing box resp.
for the mounting and operation of mech. seals can be
found in the appendix of the particular "Mounting
Instructions of the Shaft Sealing".
Further details about packing and mech. seals,
as well as the therewith connected accidental
dangers, you can find in chapter 6.6 and in
chapters 7.2 and 7.3.
In areas endangered to explosion the use of
pumps with packing is forbidden!
3.3 Bearings
The pump shaft is guided by antifriction bearings. In
the data sheet and / or order confirmation you can
see, if your pump is designed for oil lubrication
(standard design) or grease lubrication (special
design).
In areas endangered to explosion the use of
pumps with grease lubricated bearings is
forbidden!
3.3.1 Used bearings
The size of the bearing bracket of your pump is shown
in the data sheet and / or order confirmation.
Bearing bracket
pump side
42 S
NU 311 EC
55 S
NU 315 EC
75 S, 90 S
NU 320 EC
100 S
NU 324 EC
Model LS, LC, LCP
Bearing type
drive side
2x 7311 BECB
2x 7315 BECB
2x 7320 BECB
2x 7324 BCB
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