Resistance of U-shaped seals

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JACOB Pipework Systems Knowledge Resistance of U-shaped seals

Pull-ring connections with U-shaped seals when compared with pull-rings with sealant (mastic) are considerably tighter.
In order to withstand different chemical and thermal conditions, U-shaped seals are delivered in different rubber qualities.

The following consistencies are standard qualities.

Food quality with FDA-Approval

NBR

Colour:	light grey
Temperature resistance:	-30 up to +80 °C
Suitable for:	oil, fats, petrol, petroleum, partially also against solvents
Less suitable for:	steam, chlorinated carbohydrogens

Detectable by metal detectors | Compliant with EC 1935/2004, FDA certified

DETECTABLE DESIGN (Silicone)

Colour:	blue
Temperature resistance:	-60 up to +230 °C
Suitable for:	many organic oils and greases, saline solutions, ozone, cool water, partially also against solvents, resistant against ageing and weather
Less suitable for:	hot water, steam, acids, alkalies, mineral oil, fats and greases - diesel oil, benzol, petrol

More information

Food quality due BGA Category IV

SI (Silicone)

Colour:	beige
Temperature resistance:	-60 °C – +230 °C
Suitable for:	many organic oils and greases, saline solutions, ozone, cool water, partially also against solvents, resistant against ageing and weather
Less suitable for:	hot water, steam, acids, alkalies, mineral oil, fats and greases - diesel oil, benzol, petrol

Compliant with FDA, (EC) No 1935/2004 (without consideration of BfR), LFGB. BfR XXI.

EPDM (Keltan)

Colour:	black
Temperature resistance:	-30 up to +120 °C
Suitable for:	water, steam, acids, alkalies, ozone, partial also against solvents like aceton or MEK, resistant against ageing and weather
Less suitable for:	mineral oil, greases, fuels
conductive at powder coated steel, galvanized mild steel and stainless steel

Food contact articles based on natural and synthetic rubber, category 4. Valid only for dry, non-fatty foods, with the note that the goods being transported must be subsequently washed, peeled or otherwise cleaned.

Not intended for contact with food.

FKM (Viton)

Colour:	red brown
Temperature resistance:	-18 up to +230 °C
Suitable for:	oil, grease, acids, alkalies, petrol, bencene, ozone, many solvents, very high resistance against chemicals, heat and ageing
Less suitable for:	steam, detergents like acetone and MEK

You have questions about our U-shaped seals? Contact our sales team now!