4 Description
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4EYS / 4EYT
1974.91/01-EN
4 Description
4.1 General description
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KSB mechanical seal
Mechanical seal for installation in pump sets and other rotating machinery in
accordance with the manufacturer's instructions.
4.2 Designation
Example: NU048M0-4EYS
Table 4:
Designation key
Code
Description
N
Design
K
Short overall length
N
Normal overall length
S
Special overall length
U
Type
U
Unbalanced
B
Balanced
048
Nominal diameter
M
Direction of rotation
M
Bi-directional with multi-spring arrangement
S
Bi-directional with single spring
L
Direction of rotation anti-clockwise
R
Direction of rotation clockwise
0
Anti-twist lock of mating ring
0
Without lock
1
With lock
4EYS
Type series, type
4EYS Overall length N, specially developed for use in single
mechanical seal arrangement
4EYT Overall length K, specially developed for use in tandem
arrangement
4.3 Materials
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Depending on the application
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See product literature of the pump
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Selection of suitable material variant on request
4.4 Design details
Design
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Mechanical seal in modular design
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To EN 12756
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Single seal or in combination with another seal in tandem arrangement to API
Plan 52
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Dynamic type
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Bi-directional
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Axial mova/- 2.5 mm
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Torque transmission via cup point grub screws
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Multi-spring arrangement
Summary of Contents for 4EYS
Page 1: ...KSB Mechanical Seal 4EYS 4EYT Installation Operating Manual...
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