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4RDQ Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4RDQ

For the RDLO pump type series. Double, balanced cartridge seal, dynamic design. Especially designed for applications with negative suction pressure.
Spare Parts

Main Applications

  • Raw water
  • Pure water
  • Service water

Technical Data

Cartridge seal
Yes
Design
Dynamic
Balancing
Balanced mechanical seal
Sealing type
Double
Maximum allowable fluid temperature
130 °C

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Benefits

  • Double cartridge seal especially designed for applications with negative suction pressure
  • The primary ring is shrink-fitted into the metal primary ring carrier. This ensures even and stable contact.

Technical Data

Maximum allowable axial movement
2.5 mm
Minimum allowable axial movement
-2.5 mm
Component type series
KSB RDLO [A]
Cartridge seal
Yes
Maximum allowable dynamic pressure
16 bar
Design
Dynamic
Balancing
Balanced mechanical seal
Sealing type
Double
Mtrl metallic compon.mech.seal
1.4571
Mtrl mech.seal spring
2.4610
Mtrl Secondary seal outboard
FKM,
EPDM
Mtrl Secondary seal inboard
FKM,
EPDM
Mtrl Mating ring outboard
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Mating ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring outboard
B [CARBON, RESIN-IMPREGNATED]
Mtrl Primary ring inboard
B [CARBON, RESIN-IMPREGNATED],
Q1 [SIC, DRUCKLOS GESINTERT]
Direction of rotation
Bi-directional
Maximum allowable sliding velocity
10 m/s
Spring design
Multiple springs
Maximum allowable static pressure
24 bar
Maximum allowable fluid temperature
130 °C
Minimum allowable fluid temperature
-15 °C

Sectional Drawings

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