4STK Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4STK

For the Amarex KRT pump type series. Double, balanced cartridge mechanical seal, stationary design. An integrated impeller ensures the best possible circulation of the cooling liquid.
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Main Applications

  • Untreated sewage

Technical Data

Cartridge seal
Yes
Design Mechanical seal
Stationary
Mechanical seal type
Balanced mechanical seal
Sealing type Mechanical seal
Double
Max allowed fluid temp TSG
100 °C

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Benefits

  • Double cartridge seal, specially developed for dry-installed pumps of the Amarex KRT type series that are fitted with a cooling jacket with coolant circulation.
  • An impeller integrated between the seal at the impeller end and the seal at the motor end ensures the best possible circulation of the cooling liquid.
  • The special seal design facilitates installation without assembly fixtures or adjusting dimension, ensuring optimal pre-loading of the mechanical seal and low wear.

Technical Data

Max allowable axial movem TSG
2 mm
Min allowable axial movem TSG
-2 mm
Component type series
KSB Amarex KRT [B],
KSB Sewatec [B]
Cartridge seal
Yes
Max allow.dynamic pressure TSG
16 bar
Design Mechanical seal
Stationary
Mechanical seal type
Balanced mechanical seal
Sealing type Mechanical seal
Double
Mtrl metallic compon.mech.seal
1.4571
Mtrl mech.seal spring
1.4571
Mtrl Secondary seal outboard
FKM,
EPDM,
P [NITRIL-KAUTSCHUK (NBR)]
Mtrl Secondary seal inboard
FKM,
EPDM,
P [NITRIL-KAUTSCHUK (NBR)]
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
Q1 [SIC, DRUCKLOS GESINTERT]
Dir of rotation Mech seal
Clockwise rotation
Max allow.sliding speed TSG
10 m/s
Spring design Mechanical seal
Multiple springs
Max allow.static pressure TSG
20 bar
Max allowed fluid temp TSG
100 °C
Min allowed fluid temp TSG
-40 °C

Sectional Drawings

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