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: Dynamic
Balancing: Balanced mechanical seal
Sealing type: Single
Maximum allowable fluid temperature: 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

Maximum allowable axial movement: 3.5 mm
Minimum allowable axial movement: -3.5 mm
Component type series: KSB HDA [A],
KSB HDB [A]
Cartridge seal: Yes
Maximum allowable dynamic pressure: 30 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: 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 [CARBON, METAL-IMPREGNATED]
Direction of rotation: Bi-directional
Maximum allowable sliding velocity: 20 m/s
Spring design: Multiple springs
Maximum allowable static pressure: 40 bar
Maximum allowable fluid temperature: 90 °C
Minimum allowable fluid temperature: -40 °C

Sectional Drawings

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