High-Performance EPDM Flat Seals

Application area Very well suited for use in: Water, glycoles and brake fluids (on glycol... more

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Application area

Very well suited for use in:

Water, glycoles and brake fluids (on glycol base), acids (hydrochloric and nitric acid), bases (sodium hydroxide, potassium hydroxide), polar organic solvents (e.g. acetic acid), oxidizing media (e.g. peracetic acid).

Should not be used in:

Mineral fats, oils and waxes, fuels.

Product specification

Very good resistance to weather and aging

Good cold and thermal resistance

Good elastic behaviour

Good elongation at break and tearing strength

Very good resistance to polar media

Technical specification

Material: EPDM (ethylene-propylene-diene rubber)

Color: black

Crosslinking: peroxidic

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

Temperature range: -25 to +120 °C

Density: approx. 1.30 g/cm³ (DIN 53505)

Tearing strength: >5 MPa (ISO 37)

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*
408976	IBC	18	39	3	10	6	10	111.00
408977	IBC	18	39	3	10	6	20	192.00
408978	IBC	18	46	3	10	40	10	111.00
408979	IBC	18	46	3	10	40	20	192.00
408980	IBC	18	56	3	10	63	10	111.00
408981	IBC	18	56	3	10	63	20	192.00
408982	IBC	22	44	3	15	6	10	111.00
408983	IBC	22	44	3	15	6	20	192.00
408984	IBC	22	51	3	15	40	10	111.00
408985	IBC	22	51	3	15	40	20	192.00
408986	IBC	21	61	3	15	63	10	111.00
408987	IBC	21	61	3	15	63	20	192.00
408988	IBC	27	54	3	20	6	10	156.00
408989	IBC	27	54	3	20	6	20	267.00
408990	IBC	27	61	3	20	40	10	156.00
408991	IBC	27	61	3	20	40	20	267.00
408992	IBC	25	72	3	20	63	10	156.00
408993	IBC	25	72	3	20	63	20	267.00
408994	IBC	34	64	3	25	6	10	156.00
408995	IBC	34	64	3	25	6	20	267.00
408996	IBC	34	71	3	25	40	10	156.00
408997	IBC	34	71	3	25	40	20	267.00
408998	IBC	30	82	3	25	63	10	156.00
408999	IBC	30	82	3	25	63	20	267.00
409000	IBC	43	76	3	32	6	10	192.00