4HDS Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4HDS

For the HDA/HDB pump type series. Single balanced cartridge seal, dynamic design. The seal is available with a quench connection as standard.
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Main Applications

  • Feed water in power stations
  • Handling condensate in power stations

Technical Data

Cartridge seal
Yes
Design Mechanical seal
Dynamic
Mechanical seal type
Balanced mechanical seal
Sealing type Mechanical seal
Single
Max allowed fluid temp TSG
90 °C

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Benefits

  • For all applications of these pumps KSB has a perfectly matching mechanical seal on offer.
  • The 4HDS cartridge seal is available with a quench connection as standard.
  • High temperatures are accommodated by the 4HDSC seal with cooled mating ring. A variant with pumping ring for Plan 23 is also available.

Technical Data

Max allowable axial movem TSG
3.5 mm
Min allowable axial movem TSG
-3.5 mm
Component type series
KSB HDA [A],
KSB HDB [A]
Cartridge seal
Yes
Max allow.dynamic pressure TSG
30 bar
Design Mechanical seal
Dynamic
Mechanical seal type
Balanced mechanical seal
Sealing type Mechanical seal
Single
Mtrl metallic compon.mech.seal
1.4571
Mtrl mech.seal spring
1.4571
Mtrl Secondary seal inboard
FKM,
EPDM,
FFKM
Mtrl Mating ring inboard
Q1 [SIC, DRUCKLOS GESINTERT],
U2 [TUNGSTEN CARBIDE, NI-BINDER],
Q2 [SIC-C-SI, COMPOSITE]
Mtrl Primary ring inboard
A
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
40 bar
Max allowed fluid temp TSG
90 °C
Min allowed fluid temp TSG
-40 °C

Sectional Drawings

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