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4WS Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4WS

For the WKT, WK, WL, WKS pump types series. Single balanced cartridge seal, dynamic design.
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Main Applications

  • Handling condensate in power stations

Technical Data

Cartridge seal
Yes
Design
Dynamic
Balancing
Balanced mechanical seal
Sealing type
Single
Maximum allowable fluid temperature
220 °C

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Benefits

  • The balanced cartridge seal 4WS is available with a throttling bush for connection of a gas or steam quench as standard.
  • Suitable for suction pressures up to -1 bar.
  • High temperatures are accommodated by the 4WSC seal with cooled mating ring. A variant with pumping ring for Plan 23 is also available.

Technical Data

Maximum allowable axial movement
2.5 mm
Minimum allowable axial movement
-2.5 mm
Component type series
KSB WKT [A]
Cartridge seal
Yes
Maximum allowable dynamic pressure
40 bar
Design
Dynamic
Balancing
Balanced mechanical seal
Sealing type
Single
Mtrl metallic compon.mech.seal
1.4571
Mtrl mech.seal spring
1.4571
Mtrl Secondary seal inboard
EPDM
Mtrl Mating ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring inboard
A [CARBON, METAL-IMPREGNATED]
Direction of rotation
Bi-directional
Maximum allowable sliding velocity
20 m/s
Spring design
Multiple springs
Maximum allowable static pressure
60 bar
Maximum allowable fluid temperature
220 °C
Minimum allowable fluid temperature
-50 °C

Sectional Drawings

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