4EYS Mechanical seal according to DIN EN 12756

Mechanical seal according to DIN EN 12756 4EYS

For the Etanorm SYT/Etabloc SYT/Etaline SYT pump type series. Single, unbalanced component seal, dynamic design. Solid primary rings designed to maintain an optimum lubricating film between the seal faces also at high pressures and temperatures. 4EYT variant in tandem arrangement also for use as a double mechanical seal.
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Main Applications

  • Heat transfer systems
  • Hot water circulation

Technical Data

Cartridge seal
No
Design Mechanical seal
Dynamic
Mechanical seal type
Unbalanced mechanical seal
Sealing type Mechanical seal
Single
Max allowed fluid temp TSG
140 °C

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Benefits

  • In combination with the pump's design, the seal can be used for fluid temperatures of up to 350 °C. The complete Etanorm SYT application range can thus reliably be covered with this mechanical seal.
  • With the multi-spring arrangement the axial spring force is evenly distributed over the entire circumference of the primary ring. This minimises wear and contributes to a long seal life.
  • The solid primary ring is designed to maintain an optimum lubricating film between the seal faces also at high pressures and temperatures.

Technical Data

Max allowable axial movem TSG
2 mm
Min allowable axial movem TSG
-2 mm
Component type series
KSB Etanorm-SYT [B]
Cartridge seal
No
Max allow.dynamic pressure TSG
16 bar
Design Mechanical seal
Dynamic
Mechanical seal type
Unbalanced mechanical seal
Sealing type Mechanical seal
Single
Mtrl metallic compon.mech.seal
1.4571
Mtrl mech.seal spring
1.4571
Mtrl Secondary seal inboard
EPDM,
V7 [FKM, HIGH FLUORINE CONTENT]
Mtrl Mating ring inboard
Q1 [SIC, DRUCKLOS GESINTERT],
Q7 [SIC,POROUS,SINTERED PRESSURELESS,NO GRAPHIT]
Mtrl Primary ring inboard
A,
B [CARBON, RESIN-IMPREGNATED],
Q1 [SIC, DRUCKLOS GESINTERT],
Q7 [SIC,POROUS,SINTERED PRESSURELESS,NO GRAPHIT]
Dir of rotation Mech seal
Bi-directional
Max allow.sliding speed TSG
20 m/s
Spring design Mechanical seal
Multiple springs
Max allow.static pressure TSG
24 bar
Max allowed fluid temp TSG
140 °C
Min allowed fluid temp TSG
-15 °C

Sectional Drawings

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