4UM Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4UM

For KSB's submersible motors. Single balanced cartridge seal in stationary design. Easy installation and removal also under difficult operating conditions.
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Main Applications

  • Slightly contaminated water
  • Seawater

Technical Data

Cartridge seal
Yes
Design Mechanical seal
Stationary
Mechanical seal type
Balanced mechanical seal
Sealing type Mechanical seal
Single
Max allowed fluid temp TSG
110 °C

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Benefits

  • Easy installation and removal also under difficult operating conditions
  • Suitable for all operating conditions the submersible motor is approved for
  • Stationary design; the multi-spring arrangement provides uniform surface pressure across the seal faces, thus ensuring a long service life.

Technical Data

Min allowable axial movem TSG
-3 mm
Component type series
KSB UPA [A]
Cartridge seal
Yes
Max allow.dynamic pressure TSG
20 bar
Design Mechanical seal
Stationary
Mechanical seal type
Balanced mechanical seal
Sealing type Mechanical seal
Single
Mtrl metallic compon.mech.seal
1.4501,
14.462
Mtrl mech.seal spring
2.4610
Mtrl Secondary seal inboard
FKM,
EPDM,
P [NITRIL-KAUTSCHUK (NBR)]
Mtrl Mating ring inboard
A,
B [CARBON, RESIN-IMPREGNATED],
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Dir of rotation Mech seal
Bi-directional
Max allow.sliding speed TSG
20 m/s
Spring design Mechanical seal
Multiple springs
Max allow.static pressure TSG
30 bar
Max allowed fluid temp TSG
110 °C
Min allowed fluid temp TSG
-15 °C

Sectional Drawings

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