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Mechanical seal designation

153 Д 71 040 7 7 1 К К

The example of a dual seal designation
153

Designation of trade mark

It belongs to HERMETICA. Figures are determined by parameters of the seal and combination of certain design features in accordance with the company’s standard СТП-1-305310-92.

Д

Designation of seal configuration

Д dual seal of back-to-back configuration
Т dual seal of tandem configuration

The letter in the designation of a single seal is absent.

71

Designation of execution

It is determined by specific design features

040

Shaft (sleeve) diameter

Where a seal is installed

7

Designation of sealing ring material

Hermetica standard Material International designation
2 Carbon graphite resin impregnated B
3 Carbon graphite antimony impregnated A
4 Aluminium oxide V
5 Фторопласт композиционный Y
6 CrNiMoSteel E
7 Silicon graphite Q32
8 Silicon carbide Q2
9 Tungsten carbide U2
7

Designation of mating ring material

See designation of sealing ring material

1

Designation of secondary seal material

Hermetica standard Material International designation
1 PTFE
2 HNBR P
3 NBR E
4 FKM V
К

Designation of spring material

Hermetica
standard
Material International
designation
К Steel 12Х18Н10Т F
E Steel 10Х17Н13М2Т G
И Steel 06ХН28МДТ G3
М Hastelloy M3
К

Designation of other metal parts material

See designation of spring material