HCFE-EX Oil circulation sights Technopolymer up to 80°C


Main specifications


Transparent polyamide based (PA-T) technopolymer. Avoid contact with alcohol or detergents containing alcohol.

Packing ring

NBR synthetic rubber.

ATEX directive compliance

The level indicators of the HCFE-EX series comply with Health and Safety Requirements intended in 94/9/EC ATEX European Directive (explosive atmospheres) for equipments in Group II, category 2GD.
Level indicators have “kX” protection degree and can therefore be mounted on equipment protected by means of “immersion in liquid”, without lowering protection degree.
II 2 G D k T6, marked on the HCFE-EX level indicators, represents the identification according to ATEX directive.
II: group of substances for which the product is suitable
2: identification of the category
G: identification of the type of explosive atmosphere (Gases or vapours)
D: identification of the type of explosive atmosphere (Dust)
k: protection degree by means of immersion in liquid
IIB: explosive gases group (only for HCFE.20)
T6: temperature class
Ambient and/or fluid temperature: -30 to +80°C
The declaration of conformity to European Directives of this product is available and it is part of the product itself.

General information

Technical data

The tightening torque indicated in the table guarantees an optimal tightness, keeping the packing ring in the correct position.


For use with other fluids with special additives, please contact ELESA Sales Department.


Accessories on request

Brass nut type GH. for fitting to reservoirs with wall thickness smaller than 5 mm.
Oil circulation sights Technopolymer up to 80°C HCFE-EX
Code Description d1 A B D d s Tightening torque
10851-EX HCFE.12-3/8-EX G 3/8 7.5 13 22.5 15 19 3÷5 4
10901-EX HCFE.15-1/2-EX G 1/2 10.5 16 26 19 22 4÷6 5
11001-EX HCFE.20-3/4-EX G 3/4 10.5 19.5 31.5 25 27 6÷8 8