High-Performance Graphite Flat Seals

Application area Almost universally usable (depending on pressure and temperature); cover the... more

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Application area

Almost universally usable (depending on pressure and temperature); cover the full range of classic flat seals

Not usable in ozone- and fluorine-containing media

Product specification

Graduated gasket material of expanded graphite (purity min. 98 %)

Acid-proof expanded metal inlay made of chrome-nickel steel

Adhesive-free

Binderless

Filler-free

Resistant to almost all organic and anorganic acids, alkalis, oils and solvents

Technical specification

Color: graphite gray

Binding material: no

Metal insert: chrome-nickel steel (material no. 1.4404)

Density: 1.40 g/cm³ (DIN 28090-2)

Tensile strength: 25 N/mm² (MD); 10 N/mm² (CD) (DIN 52910)

Pressure resistance: 45 N/mm² (+175 °C); 43 N/mm² (+300 °C) (DIN 52913)

Compressibility: 30 % (ASTM F 36 J)

Recovery: 20 % (ASTM F 36 J)

Cold compressibility KSW: 25 - 35 % (DIN 28090-2)

Cold recovery KRW: 3.5 - 5 % (DIN 28090-2)

Hot creep WSW/300: <5 % (DIN 28090-2)

Hot recovery WRW/300: >3 % (DIN 28090-2)

Recovery R: 0.065 mm (DIN 28090-2)

Leakage TA-Luft: (VDI 2200 draft)

Component testing: 30 Mpa, +300 °C, 1 bar helium 0.0001 mbar*l/m*s

Chlorine content: total: 300 ppm (Siemens AV 9-014), water-soluble: 50 ppm (Siemens AV 9-014)

Fluoride content: 300 ppm (Siemens AV 9-014)

Temperature range: -240 to +550 °C (depending on pressure)

Max. operating pressure: 200 bar (depending on temperature)

Regulations: German TA-Luft certification, Firesafe (API607 / BS6755), BAM (O2: +200 °C / 130 bar), DVGW

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*
409424	IBC	18	39	2	10	6	10	103.00
409425	IBC	18	39	2	10	6	20	172.00
409426	IBC	18	46	2	10	40	10	103.00
409427	IBC	18	46	2	10	40	20	172.00
409428	IBC	18	56	2	10	63	10	103.00
409429	IBC	18	56	2	10	63	20	172.00
409430	IBC	22	44	2	15	6	10	111.00
409431	IBC	22	44	2	15	6	20	185.00
409432	IBC	22	51	2	15	40	10	111.00
409433	IBC	22	51	2	15	40	20	185.00
409434	IBC	21	61	2	15	63	10	111.00
409435	IBC	21	61	2	15	63	20	185.00
409436	IBC	27	54	2	20	6	10	133.00
409437	IBC	27	54	2	20	6	20	221.00
409438	IBC	27	61	2	20	40	10	133.00
409439	IBC	27	61	2	20	40	20	221.00
409440	IBC	25	72	2	20	63	10	133.00
409441	IBC	25	72	2	20	63	20	221.00
409442	IBC	34	64	2	25	6	5	98.00
409443	IBC	34	64	2	25	6	10	171.00
409444	IBC	34	71	2	25	40	5	98.00
409445	IBC	34	71	2	25	40	10	171.00
409446	IBC	30	82	2	25	63	5	98.00
409447	IBC	30	82	2	25	63	10	171.00
409448	IBC	43	76	2	32	6	5	118.00
409449	IBC	43	76	2	32	6	10	205.00
409450	IBC	43	82	2	32	40	5	118.00
409451	IBC	43	82	2	32	40	10	205.00
409452	IBC	41	88	2	32	63	5	118.00
409453	IBC	41	88	2	32	63	10	205.00
409454	IBC	49	86	2	40	6	5	136.00
409455	IBC	49	86	2	40	6	10	237.00
409456	IBC	49	92	2	40	40	5	136.00
409457	IBC	49	92	2	40	40	10	237.00
409458	IBC	47	103	2	40	63	5	136.00
409459	IBC	47	103	2	40	63	10	237.00
409460	IBC	61	96	2	50	6	5	171.00
409461	IBC	61	96	2	50	6	10	296.00
409462	IBC	61	107	2	50	40	5	171.00
409463	IBC	61	107	2	50	40	10	296.00
409464	IBC	59	113	2	50	63	5	171.00
409465	IBC	59	113	2	50	63	10	296.00
409466	IBC	77	116	2	65	6	5	221.00
409467	IBC	77	116	2	65	6	10	382.00
409468	IBC	77	127	2	65	40	5	221.00
409469	IBC	77	127	2	65	40	10	382.00
409470	IBC	73	138	2	65	63	5	221.00
409471	IBC	73	138	2	65	63	10	382.00
409472	IBC	89	132	2	80	6	5	247.00
409473	IBC	89	132	2	80	6	10	422.00
409474	IBC	89	142	2	80	40	5	247.00
409475	IBC	89	142	2	80	40	10	422.00
409476	IBC	86	148	2	80	63	5	247.00
409477	IBC	86	148	2	80	63	10	422.00
409478	IBC	115	152	2	100	6	5	282.00
409479	IBC	115	152	2	100	6	10	483.00
409480	IBC	115	162	2	100	16	5	282.00
409481	IBC	115	162	2	100	16	10	483.00
409482	IBC	115	168	2	100	40	5	280.00
409483	IBC	115	168	2	100	40	10	472.00
409484	IBC	110	174	2	100	63	5	280.00
409485	IBC	110	174	2	100	63	10	472.00
409486	IBC	141	182	2	125	6	5	347.00
409487	IBC	141	182	2	125	6	10	587.00
409488	IBC	141	192	2	125	16	5	347.00
409489	IBC	141	192	2	125	16	10	587.00
409490	IBC	141	194	2	125	40	5	347.00
409491	IBC	141	194	2	125	40	10	587.00
409492	IBC	135	210	2	125	63	5	347.00
409493	IBC	135	210	2	125	63	10	587.00
409494	IBC	169	207	2	150	6	5	394.00
409495	IBC	169	207	2	150	6	10	656.00
409496	IBC	169	218	2	150	16	5	394.00
409497	IBC	169	218	2	150	16	10	656.00
409498	IBC	169	224	2	150	40	5	416.00
409499	IBC	169	224	2	150	40	10	693.00
409500	IBC	163	247	2	150	63	5	416.00
409501	IBC	163	247	2	150	63	10	693.00
409502	IBC	220	262	2	200	6	5	533.00
409503	IBC	220	262	2	200	6	10	871.00
409504	IBC	220	273	2	200	16	5	533.00
409505	IBC	220	273	2	200	16	10	871.00
409506	IBC	220	284	2	200	25	5	579.00
409507	IBC	220	284	2	200	25	10	947.00
409508	IBC	220	290	2	200	40	5	604.00
409509	IBC	220	290	2	200	40	10	987.00
409510	IBC	210	309	2	200	63	5	604.00
409511	IBC	210	309	2	200	63	10	987.00
409512	TG	29	39	2	15		10	111.00
409513	TG	29	39	2	15		20	185.00
409514	TG	36	50	2	20		10	133.00
409515	TG	36	50	2	20		20	221.00
409516	TG	43	57	2	25		5	98.00
409517	TG	43	57	2	25		10	171.00
409518	TG	51	65	2	32		5	118.00
409519	TG	51	65	2	32		10	205.00
409520	TG	61	75	2	40		5	136.00
409521	TG	61	75	2	40		10	237.00
409522	TG	73	87	2	50		5	171.00
409523	TG	73	87	2	50		10	296.00
409524	TG	95	109	2	65		5	221.00
409525	TG	95	109	2	65		10	382.00
409526	TG	106	120	2	80		5	247.00
409527	TG	106	120	2	80		10	422.00
409528	TG	129	149	2	100		5	280.00
409529	TG	129	149	2	100		10	472.00
409530	TG	155	175	2	125		5	347.00
409531	TG	155	175	2	125		10	587.00
409532	TG	183	203	2	150		5	416.00
409533	TG	183	203	2	150		10	693.00
409534	TG	239	259	2	200		5	604.00
409535	TG	239	259	2	200		10	987.00