High-Performance NBR Flat Seals

Application area Very good choice for: Applications involving mechanical load, as well as in... more

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Application area

Very good choice for:

Applications involving mechanical load, as well as in mineral oils, fats and waxes, motor oils and fuels.

Should not be used:

Concentrated acids (e.g. nitric or formic acid), concentrated oxidizing media (e.g. peracetic acid), aromatic and chlorinated hydrocarbons.

Product specification

Good thermal resistance

The level of ACN is tailored to the specific application, so that the optimal balance of chemical resistance and low-temperature flexibility is achieved

Good resistance to mineral oil and fuels, outstanding resistance to vegetable and animal oils, silicones, diluted acids and bases at room temperature

In aromatic and chlorinated hydrocarbons NBR is prone to swelling

Technical specification

Material: NBR (butadiene-acrylonitrile rubber)

Color: black

Crosslinking: peroxidic

Shore hardness A: 65° ±5 (test plate) (DIN 53505)

Temperature range: -20 to +100 °C

Density: approx. 1.35 g/cm³ (DIN 53505)

Tearing strength: >5 MPa (DIN 53504)

Elongation at break: >200 % (DIN 53504)

General Information Flat seals are usually stamped as rings. For more complicated geometries,... more

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General Information

Flat seals are usually stamped as rings. For more complicated geometries, the rings are frequently cut by means of plotter or water jet. Rings are defined by the dimensions of the internal and external diameter as well as by the total thickness of the ring but often also by nominal diameter and pressure stage according to DIN 2690, 2691 (or 2692). For the purpose of harmonizing standards, these former flat seal standards are summarized in the EU standard DIN.

EN 1514-1. Still, the following sub-descriptions serve the purpose of illustrating the individual shapes: former DIN 2690: now EN 1514-1 Form IBC for smooth flanges; former DIN 2691: now EN 1514-1 Form TG for flanges with groove and tongue.

Advantages compared with other sealing elements:

symmetrical cross section, simple compact design, easy installation, wide selection of materials, grooving not required

Most common application: Flange sealing against liquid or gaseous media; static or quasistatic applications only.

Further applications: Housing and cover sealings.

Method of operation: The flat seal is axially pressed when mounting. The axial press force has to be greater than the sum of all radially acting forces to eliminate the risk of leakage. Cross-sectional leakage (the leakage diffused through the sealing material) is minimized by the selection of the right material. An optimal grouting of the flat seal prevents surface leakage, i.e. leakage occurring between flange and seal.

Materials for special requirements:

These flat seals are especially suited for use in processes that must comply with TA-Luft requirements.

Form IBC for smooth flanges: NW 10 to 200, PN 2.5 to 63

Form TG for flanges with groove and tongue: NW 10 to 200, PN 10 to 160

Manufacturing: according to the latest standards, with an optimal tool park, for quick and flexible handling, the traceability of materials is guaranteed, all parts go through a quality check before packaging.

Item	Design¹	Innen-Ø mm	Außen-Ø mm	Höhe mm	NW mm	PN bar	Einheit Stück	Price Euro*
408864	IBC	18	39	3	10	6	10	68.00
408865	IBC	18	39	3	10	6	20	118.00
408866	IBC	18	46	3	10	40	10	68.00
408867	IBC	18	46	3	10	40	20	118.00
408868	IBC	18	56	3	10	63	10	68.00
408869	IBC	18	56	3	10	63	20	118.00
408870	IBC	22	44	3	15	6	10	68.00
408871	IBC	22	44	3	15	6	20	118.00
408872	IBC	22	51	3	15	40	10	68.00
408873	IBC	22	51	3	15	40	20	118.00
408874	IBC	21	61	3	15	63	10	68.00
408875	IBC	21	61	3	15	63	20	118.00
408876	IBC	27	54	3	20	6	10	80.00
408877	IBC	27	54	3	20	6	20	140.00
408878	IBC	27	61	3	20	40	10	80.00
408879	IBC	27	61	3	20	40	20	140.00
408880	IBC	25	72	3	20	63	10	80.00
408881	IBC	25	72	3	20	63	20	140.00
408882	IBC	34	64	3	25	6	10	104.00
408883	IBC	34	64	3	25	6	20	178.00
408884	IBC	34	71	3	25	40	10	104.00
408885	IBC	34	71	3	25	40	20	178.00
408886	IBC	30	82	3	25	63	10	104.00
408887	IBC	30	82	3	25	63	20	178.00
408888	IBC	43	76	3	32	6	10	112.00
408889	IBC	43	76	3	32	6	20	196.00
408890	IBC	43	82	3	32	40	10	112.00
408891	IBC	43	82	3	32	40	20	196.00
408892	IBC	41	88	3	32	63	10	112.00
408893	IBC	41	88	3	32	63	20	196.00
408894	IBC	49	86	3	40	6	10	128.00
408895	IBC	49	86	3	40	6	20	218.00
408896	IBC	49	92	3	40	40	10	128.00
408897	IBC	49	92	3	40	40	20	218.00
408898	IBC	47	103	3	40	63	10	128.00
408899	IBC	47	103	3	40	63	20	218.00
408900	IBC	61	96	3	50	6	10	148.00
408901	IBC	61	96	3	50	6	20	254.00
408902	IBC	61	107	3	50	40	10	148.00
408903	IBC	61	107	3	50	40	20	254.00
408904	IBC	59	113	3	50	63	10	148.00
408905	IBC	59	113	3	50	63	20	254.00
408906	IBC	77	116	3	65	6	10	176.00
408907	IBC	77	116	3	65	6	20	298.00
408908	IBC	77	127	3	65	40	10	176.00
408909	IBC	77	127	3	65	40	20	298.00
408910	IBC	73	138	3	65	63	10	176.00
408911	IBC	73	138	3	65	63	20	298.00
408912	IBC	89	132	3	80	6	10	206.00
408913	IBC	89	132	3	80	6	20	350.00
408914	IBC	89	142	3	80	40	10	206.00
408915	IBC	89	142	3	80	40	20	350.00
408916	IBC	86	148	3	80	63	10	206.00
408917	IBC	86	148	3	80	63	20	350.00
408918	IBC	115	152	3	100	6	10	234.00
408919	IBC	115	152	3	100	6	20	396.00
408920	IBC	115	162	3	100	16	10	234.00
408921	IBC	115	162	3	100	16	20	396.00
408922	IBC	115	168	3	100	40	10	234.00
408923	IBC	115	168	3	100	40	20	396.00
408924	IBC	110	174	3	100	63	10	234.00
408925	IBC	110	174	3	100	63	20	396.00
408926	IBC	141	182	3	125	6	10	234.00
408927	IBC	141	182	3	125	6	20	390.00
408928	IBC	141	192	3	125	16	10	234.00
408929	IBC	141	192	3	125	16	20	390.00
408930	IBC	141	194	3	125	40	10	234.00
408931	IBC	141	194	3	125	40	20	390.00
408932	IBC	135	210	3	125	63	10	234.00
408933	IBC	135	210	3	125	63	20	390.00
408934	IBC	169	207	3	150	6	10	282.00
408935	IBC	169	207	3	150	6	20	468.00
408936	IBC	169	218	3	150	16	10	282.00
408937	IBC	169	218	3	150	16	20	468.00
408938	IBC	169	224	3	150	40	10	282.00
408939	IBC	169	224	3	150	40	20	468.00
408940	IBC	163	247	3	150	63	10	282.00
408941	IBC	163	247	3	150	63	20	468.00
408942	IBC	220	262	3	200	6	5	298.00
408943	IBC	220	262	3	200	6	10	518.00
408944	IBC	220	273	3	200	16	5	298.00
408945	IBC	220	273	3	200	16	10	518.00
408946	IBC	220	284	3	200	25	5	298.00
408947	IBC	220	284	3	200	25	10	518.00
408948	IBC	220	290	3	200	40	5	298.00
408949	IBC	220	290	3	200	40	10	518.00
408950	IBC	210	309	3	200	63	5	298.00
408951	IBC	210	309	3	200	63	10	518.00
408952	TG	29	39	3	15		10	80.00
408953	TG	29	39	3	15		20	140.00
408954	TG	36	50	3	20		10	80.00
408955	TG	36	50	3	20		20	140.00
408956	TG	43	57	3	25		10	106.00
408957	TG	43	57	3	25		20	180.00
408958	TG	51	65	3	32		10	106.00
408959	TG	51	65	3	32		20	180.00
408960	TG	61	75	3	40		10	118.00
408961	TG	61	75	3	40		20	198.00
408962	TG	73	87	3	50		10	138.00
408963	TG	73	87	3	50		20	232.00
408964	TG	95	109	3	65		10	176.00
408965	TG	95	109	3	65		20	298.00
408966	TG	106	120	3	80		10	206.00
408967	TG	106	120	3	80		20	350.00
408968	TG	129	149	3	100		10	234.00
408969	TG	129	149	3	100		20	396.00
408970	TG	155	175	3	125		10	234.00
408971	TG	155	175	3	125		20	390.00
408972	TG	183	203	3	150		5	176.00
408973	TG	183	203	3	150		10	304.00
408974	TG	239	259	3	200		5	280.00
408975	TG	239	259	3	200		10	478.00