Xylem LMZ - Manual (Page 46)

Installation, Operating and Maintenance Instruction Model LR, LMR, LRZ, LMZ
page 42
3.3 Shaft Sealing
3.3.1 Structure of the mechanical seal
This shaft seal is a single mech. seal with installation
dimensions according to EN 12756 (DIN 24960)
design "K". API plan 02 / ISO plan 00.
No additional flushing of the seal chamber is
necessary. The seal casing where the mechanical
seal is located must always be filled with liquid.
For a description of materials and operational ranges
of the mech. seals supplied, please refer to the data
sheet in the Operation Instructions and order
confirmation.
For the internal structure of the mechanical seal see
the following sectional drawings.
LMR, LMZ LR, LRZ
Index of parts:
3 Impeller
18/G Casing
cover
24 Shaft
412 Elbow
sleeve
447 Spring
472
Rotating seal ring
474 Disc
475
Stationary seal ring
483 Bag
484.1 Elbow
ring
487 Towing
DR Orifice
Index of parts:
1 Impeller
18/G Casing
cover
24 Shaft
GD1
Spring with towing effect
GD2 O-ring (Shaft)
GD3 Rotating seal ring socket
GD4 O-ring (Rotating seal ring)
GD5 Rotating seal ring
GD6 Stationary seal ring
GD7 O-ring (Stationary seal ring)
Pump size LMR, LMZ d
1
d
7
d
L
l
1k
LMR 125-160, LMR 125-200
LMR 125-250, LMR 125-315
LMR 150-250,
LMZ 125-160, LMZ 125-200
LMZ 125-250, LMZ 150-250
40 58 32 45
LMR 150-200, LMZ 150-200 50 70 42 47,5
Pump size LR, LRZ d
1
d
7
d
L
l
1k
LR 40-125, LR 40-160
LR 40-200, LR 40-250
LR 50-125, LR 50-160
LR 50-200, LR 65-125
LR 65-160, LR 65-200
LR 80-125, LR 80-160
LRZ 40-125, LRZ 40-160
LRZ 40-200, LRZ 40-250
22 37 18 37,5
Pump size LMR, LMZ d
1
d
7
d
L
l
1k
LRZ 40-200, LRZ 40-250
LRZ 50-125, LRZ 50-160
LRZ 50-200, LRZ 65-125
LRZ 65-160, LRZ 65-200
LRZ 80-125, LRZ 80-160
22 37 18 37,5
LR 50-250, LR 65-250
LR 80-200, LR 80-250
LR 100-160, LR 100-200
LRZ 50-250, LRZ 65-250
LRZ 80-200, LRZ 80-250
LRZ 100-160, LRZ 100-200
28 43 24 42,5
LR 100-250
LRZ 100-250
33 48 29 42,5
The mentioned dimensions refer to mechanical seals acc. EN
12756 with length l
1k
. Dimensions in mm without obligation! - This
leaflet is subject to alteration without notice !