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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
X6CRNIMOTI17-12-2
Mtrl mech.seal spring
X6CRNIMOTI17-12-2
Mtrl Secondary seal inboard
ETHYLENE-PROPYLENE-DIENE-RUBBER
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

Download
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