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4RPQ Pump-specific cartridge mechanical seal

Pump-specific cartridge mechanical seal 4RPQ

For the RPH pump type series. Single balanced cartridge seal in stationary design.
Spare Parts
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Main Applications

  • Non-API 682 applications in the chemical and petrochemical industries

Technical Data

Cartridge seal
Yes
Design
Stationary
Balancing
Balanced mechanical seal
Sealing type
Single
Maximum allowable fluid temperature
150 °C

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Benefits

  • The materials and design ensure a long service life. The mechanical seal features a quench connection for flushing out leakage on the atmospheric side.
  • Easy installation; the assembly fixtures provide optimal spring pre-loading and pre-centring for transport and installation.
  • A floating throttling ring provides additional safety.

Technical Data

Maximum allowable axial movement
1 mm
Minimum allowable axial movement
-1 mm
Component type series
KSB RPH [B]
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
2.4610
Mtrl Secondary seal inboard
EPDM
Mtrl Mating ring inboard
B [CARBON, RESIN-IMPREGNATED]
Mtrl Primary ring inboard
Q1 [SIC, DRUCKLOS GESINTERT]
Direction of rotation
Bi-directional
Maximum allowable sliding velocity
20 m/s
Spring design
Multiple springs
Maximum allowable static pressure
60 bar
Maximum allowable fluid temperature
150 °C
Minimum allowable fluid temperature
-40 °C

Sectional Drawings

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