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4CPD Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4CPD

For the MegaCPK/CPKN pump type series. Double cartridge seal, double pressure balanced, stationary (inboard) and dynamic (outboard) design. The pumping ring of 4CPDF circulates the buffer/barrier fluid effectively.

Main Applications

  • Chemical industry
  • Petrochemical industry

Technical Data

Cartridge seal
Yes
Design
Stationary
Balancing
Cartridge seal
Sealing type
Double
Maximum allowable fluid temperature
200 °C

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Benefits

  • The double cartridge seal can be operated with either unpressurised buffer fluid or pressurised barrier fluid.
  • Assembly fixtures ensure optimum pre-loading of the cartridge seal.
  • The mechanical seal cover is centred on the pump cover and confines the gasket.

Technical Data

Maximum allowable axial movement
1.5 mm
Minimum allowable axial movement
-1.5 mm
Component type series
KSB CPKN [A],
KSB MegaCPK [B]
Cartridge seal
Yes
Maximum allowable dynamic pressure
25 bar
Design
Stationary
Balancing
Cartridge seal
Sealing type
Double
Mtrl metallic compon.mech.seal
1.4571
Mtrl mech.seal spring
1.4571
Mtrl Secondary seal inboard
FKM,
EPDM,
FFKM
Mtrl Mating ring outboard
B [CARBON, RESIN-IMPREGNATED],
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Mating ring inboard
A [CARBON, METAL-IMPREGNATED],
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring outboard
A [CARBON, METAL-IMPREGNATED],
B [CARBON, RESIN-IMPREGNATED]
Mtrl Primary ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Direction of rotation
Bi-directional
Maximum allowable sliding velocity
16 m/s
Spring design
Multiple springs
Maximum allowable static pressure
37.5 bar
Maximum allowable fluid temperature
200 °C
Minimum allowable fluid temperature
-40 °C

Sectional Drawings

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