4STQ Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4STQ

For the Sewatec/Sewabloc and Amarex KRT pump type series. Double, balanced cartridge seal, stationary design. Springs located outside the fluid handled in the oil reservoir.

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Main Applications

Untreated sewage

Technical Data

Cartridge seal: Yes
Design: Stationary
Balancing: Balanced mechanical seal
Sealing type: Double
Maximum allowable fluid temperature: 100 °C

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Benefits

Double mechanical seal in tandem arrangement, can be installed as one unit, bi-directional and balanced.
Stationary design, springs located outside the fluid handled in the oil reservoir The springs are insensitive to contamination and provide uniform surface pressure across the seal faces, thus ensuring a long service life.
Tailored to the seal installation space and requirements of the pump.

Technical Data

Maximum allowable axial movement: 2 mm
Minimum allowable axial movement: -2 mm
Component type series: KSB Amarex KRT [B],
KSB Sewabloc [B],
KSB Sewatec [B]
Cartridge seal: Yes
Maximum allowable dynamic pressure: 16 bar
Design: Stationary
Balancing: Balanced mechanical seal
Sealing type: Double
Mtrl metallic compon.mech.seal: 1.4122
Mtrl mech.seal spring: 1.4571,
2.4610
Mtrl Secondary seal outboard: FKM
Mtrl Secondary seal inboard: FKM
Mtrl Mating ring outboard: Q1 [SIC, DRUCKLOS GESINTERT],
U2 [TUNGSTEN CARBIDE, NI-BINDER]
Mtrl Mating ring inboard: Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring outboard: Q1 [SIC, DRUCKLOS GESINTERT]
Mtrl Primary ring inboard: Q1 [SIC, DRUCKLOS GESINTERT]
Direction of rotation: Bi-directional
Maximum allowable sliding velocity: 10 m/s
Spring design: Multiple springs
Maximum allowable static pressure: 20 bar
Maximum allowable fluid temperature: 100 °C
Minimum allowable fluid temperature: -40 °C

Sectional Drawings

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