Letectví a kosmonautika - O-kroužky z fluorokarbonové pryže (FKM), s nízkou trvalou deformací - Tvrdost 80 IRHD (Norma k přímému použití jako ČSN).

The information about the standard:

Designation standards: ČSN EN 3049
Classification mark: 317151
Catalog number: 523348
Publication date standards: 1.5.2026
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: Czech technical standard
Kategória: Technické normy ČSN

Annotation of standard text ČSN EN 3049 (317151):

This document specifies the characteristics of O-rings in fluorocarbon rubber (FKM), low compression set, hardness 80 IRHD, for aerospace applications.
They are intended to be used in air, mineral / synthetic oil and fuel systems.
Operating conditions - Temperature:
a) Continuous operation: -20 °C to +225 °C;
b) Static applications minimum temperature of use: -50 °C.
Limitation: not used with phosphoric ester type hydraulic fluids (permanent or temporary immersion)