High-Performance FPM Flat Seals

Application area Very well suited for use in: Mineral oils, fats and waxes, motor oils and... more

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Application area

Very well suited for use in:

Mineral oils, fats and waxes, motor oils and fuels, aliphatic and aromatic hydrocarbons, amines, hydraulic fluids, essential oils, and in high-temperature applications.

Should not be used in:

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

Product specification

Outstanding temperature resistance

Very good resistance to ozone, oxygen, aging, and weather

Excellent resistance in mineral oils and fats

Low permeability to gas

Very good resistance in nonpolar media

Shows significant swelling in polar solvents and ketones

Technical specification

Material: FPM (fluorocarbon rubber)

Color: black

Crosslinking: peroxidic

Shore hardness A: 75° ±5 (test plate) (DIN 53504)

Temperature range: -10 to +200 °C

Density: approx. 2.00 g/cm³ (DIN 53505)

Tensile strength: approx. 9 MPa

Elongation at break: approx. 200 %

Tear propagation resistance: approx. 5 N/mm²

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*
409088	IBC	18	39	2	10	6	10	159.00
409089	IBC	18	39	2	10	6	20	270.00
409090	IBC	18	46	2	10	40	10	159.00
409091	IBC	18	46	2	10	40	20	270.00
409092	IBC	18	56	2	10	63	10	159.00
409093	IBC	18	56	2	10	63	20	270.00
409094	IBC	22	44	2	15	6	10	153.00
409095	IBC	22	44	2	15	6	20	256.00
409096	IBC	22	51	2	15	40	10	153.00
409097	IBC	22	51	2	15	40	20	256.00
409098	IBC	21	61	2	15	63	10	153.00
409099	IBC	21	61	2	15	63	20	256.00
409100	IBC	27	54	2	20	6	5	131.00
409101	IBC	27	54	2	20	6	10	229.00
409102	IBC	27	61	2	20	40	5	131.00
409103	IBC	27	61	2	20	40	10	229.00
409104	IBC	25	72	2	20	63	5	131.00
409105	IBC	25	72	2	20	63	10	229.00
409106	IBC	34	64	2	25	6	5	173.00
409107	IBC	34	64	2	25	6	10	302.00
409108	IBC	34	71	2	25	40	5	173.00
409109	IBC	34	71	2	25	40	10	302.00
409110	IBC	30	82	2	25	63	5	173.00
409111	IBC	30	82	2	25	63	10	302.00
409112	IBC	43	76	2	32	6	5	224.00