Mechanical seal
CHETRA

Acc. to factory standards, ISO and ANSI standards
Typ 431K
* single-acting
* unbalanced
* mech. seal with elastomer bellows, independent of direction of rotation
* single spring

Dimensions: 10-100 mm
pmax: 12 bar
t: -20°C up to 100/200°C
(acc. to elastomer material)
vmax:10 m/s

431 mech. seals are simple, solid seals with spring freely accessible to be flushed, for many applications, e.g. with waste water.
Fitting dimensions acc. to DIN 12756 (formerly 24960); deviations to DIN in the diameter range.
Style 431K is the most widely used version; further designs with longer bellows: style 431 and 431N (acc. to DIN L1K or DIN L1N).
Stationary seat in block shape with collar (style BM) as shown in the illustration or optional with DIN stationary seat (style DIN-KL) without torsion lock.
Mostly required elastomer materials: Viton® fluoroelastomers *), NBR, EPDM.