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4MC Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4MC

For the Movitec pump type series. Single, balanced cartridge seal designed for installation in vertical pumps for applications with high pressures and speeds.
Spare Parts

Main Applications

  • Hot water and cooling water recirculation
  • Boiler feed applications

Technical Data

Cartridge seal
Yes
Design
Stationary
Balancing
Balanced mechanical seal
Sealing type
Single
Maximum allowable fluid temperature
200 °C

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Benefits

  • Single cartridge mechanical seal, stationary design.
  • Designed for installation in vertical pumps for applications with high pressures and speeds.
  • The stationary design ensures that the sealing clearance is positioned closer to the impellers. This lowers the risk of dry running in the event of a gas pocket forming in the seal chamber.

Technical Data

Maximum allowable axial movement
1.5 mm
Minimum allowable axial movement
-1.5 mm
Component type series
KSB Movitec [A]
Cartridge seal
Yes
Maximum allowable dynamic pressure
40 bar
Design
Stationary
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
Mtrl Mating ring inboard
A [CARBON, METAL-IMPREGNATED],
B [CARBON, RESIN-IMPREGNATED],
Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Direction of rotation
Bi-directional
Maximum allowable sliding velocity
8 m/s
Spring design
Multiple springs,
Single spring
Maximum allowable static pressure
45 bar
Maximum allowable fluid temperature
200 °C
Minimum allowable fluid temperature
-40 °C

Sectional Drawings

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