Mechanical seal KSB
4RD
Technical Data Mechanical seal 4RD
- Operating pressure Up to 25 bar, dynamic
Up to 37.5 bar, static - Temperature 0 °C to 140 °C
- Shaft unit (seal size)
110 (125), 125 (135), 140 (155), 160 (175) - Business type Standard (KSB EasySelect)
Technical Description Mechanical seal 4RD
- Design Single mechanical seal
- Type Dynamic, balanced
- Springs Multi-spring arrangement
- Direction of rotation Bi-directional
- Additional information
Various wear part kits available, see ZN3302
Specifications
- Dependable
Dynamic type, multi-spring arrangement, bi-directional and balanced. Sturdy and practical seal design. - Robust
The primary ring is shrink-fitted into the metal primary ring carrier. This ensures even contact, also under fluctuating pressure and temperature conditions. - Different material variants
Elastomers made of EPDM also available with WRAS approval. Metal parts available in super duplex stainless steel (1.4501) for seawater applications. - Service-friendly
Easy to install, no adjusting dimension required. Together with the shaft protecting sleeve and the seal cover, the mechanical seal can be installed like a cartridge. - Compact
The primary ring is kept in position in the torquetransmitting element for transport and installation.
The space between the two mechanical seals is flushed with a buffer or barrier fluid, depending on the application. This completely absorbs any leakage of the fluid pumped. In addition, the heat is transported away from this area. The double pressure balanced mechanical seal can be operated with pressurised barrier fluid or unpressurised buffer fluid.
Applications Seal 4RD
- raw water
- clean water
- service water
Suitable for pump
Suitable for KSB’s RDLO
Materials Seal 4RD
- Primary ring SiC (Q1)
- Mating ring SiC (Q1) / “A“ carbon (A) / “B“ carbon (B)
- Elastomers EPDM (E) / FKM (V)
- Springs 2.4610 (M)
- Other Components 1.4571 (G) / 1.4501 (G4)
Other material combinations on request