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4Spider Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4Spider

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

Main Applications

  • Contaminated water
  • Seawater

Technical Data

Cartridge seal
Yes
Design
Stationary
Balancing
Balanced mechanical seal
Sealing type
Single
Maximum allowable fluid temperature
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

Minimum allowable axial movement
-3 mm
Component type series
KSB UPA [A]
Cartridge seal
Yes
Maximum allowable dynamic pressure
20 bar
Design
Stationary
Balancing
Balanced mechanical seal
Sealing type
Single
Mtrl metallic compon.mech.seal
1.4501,
1.4462
Mtrl mech.seal spring
2.4610
Mtrl Secondary seal inboard
FKM
Mtrl Mating ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Direction of rotation
Bi-directional
Maximum allowable sliding velocity
20 m/s
Spring design
Multiple springs
Maximum allowable static pressure
30 bar
Maximum allowable fluid temperature
110 °C
Minimum allowable fluid temperature
-15 °C

Sectional Drawings

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