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Brand: Klinger
Klinger KLINGERSIL C-4400 Aramid Fibre NBR Gasket Sheet
Description
Universal aramid-NBR sheet for water, oil, gas and steam joints
KLINGERSIL C-4400 is the universal grade of the Klinger fibre-reinforced gasket range: aramid fibres bonded with NBR, supplied as a green sheet. Klinger describes it as a material with a unique matrix that delivers an excellent combination of properties, and sells it on the message of higher safety for universal applications.
The datasheet lists resistance to oils, water, steam, gases, salt solutions, fuels, alcohols, moderate organic and inorganic acids, hydrocarbons, lubricants and refrigerants. The features Klinger highlights are a universal high-pressure material, dimensional stability and consistent material composition, with an excellent price and performance ratio and very good resistance to refrigerants as the stated benefits.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / model | Klinger (Rich. Klinger Dichtungstechnik), KLINGERSIL C-4400 |
| Basis composition | Aramid fibres bonded with NBR |
| Colour | Green |
| Sheet size | 1000 x 1500 mm, 2000 x 1500 mm |
| Thickness | 0.5, 1.0, 1.5, 2.0, 3.0 mm |
| Tolerances | Thickness per DIN 28091-1; length and width plus or minus 50 mm |
| Certificates and approvals as printed | Oxygen-tested, DIN-DVGW, DVGW H2-ready (ZP 5123), DIN 16421 (W 270), DIN 30653 (VP 401), KTW-BWGL, OVGW Reg. No. G 1.912, TA-Luft (Clean air), DNV approval, SVGW approval, Fire-Safe acc. to DIN EN ISO 10497 |
| Industries listed | General industry, chemical, oil and gas, energy, infrastructure, pulp and paper, marine, automotive, food and beverage |
| Compressibility, ASTM F 36 J (2.0 mm) | 11 % |
| Recovery, ASTM F 36 J | 55 % |
| Stress relaxation, DIN 52913, 50 MPa, 16 h | 37 MPa at 175 °C; 25 MPa at 300 °C |
| Stress relaxation, BS 7531, 40 MPa, 16 h at 300 °C | 25 MPa |
| Klinger cold/hot compression, 50 MPa, thickness decrease | 10 % at 23 °C; 20 % at 300 °C |
| Tightness, DIN 28090-2 | 0.02 mg/(s x m) |
| Specific leak rate, VDI 2440 | 1.64E-08 mbar x l/(s x m) |
| Thickness increase after immersion, ASTM F 146 | 3 % (oil IRM 903, 5 h at 150 °C); 5 % (fuel B, 5 h at 23 °C) |
| Density | 1.6 g/cm3 |
| Thermal conductivity | 0.42 W/mK |
| Classification, BS 7531:2006 | Grade AY |
| ASME code sealing factors, 2.0 mm, tightness class 0.1 mg/(s x m) | y 15 MPa, m 1.6 |
| Chemical resistance chart in datasheet | A (small or no attack) for paraffinic hydrocarbon, motor oil, alcohol, water, diluted acid and diluted base; B (weak to moderate attack) for motor fuel and mineral lubricants; C (strong attack) for aromates, chlorinated hydrocarbon fluids, ketone and ester |
All values are typical values for a 2.0 mm sheet as printed in the Klinger datasheet; other thicknesses can differ.
Choosing C-4400 within the KLINGERSIL range
C-4400 is the sensible starting grade when the medium is water, oil, gas or a refrigerant and the duty does not need the extra stress retention of C-4430 or the alkaline and superheated-steam capability of C-4500. The datasheet figures give a feel for the margin: the sheet loses about 10 % of its thickness at 23 °C and about 20 % at 300 °C under 50 MPa, and the residual stress after 16 hours at 300 °C is 25 MPa in the DIN 52913 test.
The ASME factors printed for 2.0 mm (y 15 MPa, m 1.6) are the numbers a designer needs for a flange calculation. The DVGW, KTW-BWGL and OVGW listings are relevant where drinking-water or gas-network approval is part of the specification; check each approval against the exact thickness and application in the Klinger approval documents.
Related KLINGER gasket sheets
Klinger sorts its fibre sheets by duty. The nearest alternatives to C-4400 are listed below.
| Model | Basis | Colour | Positioning printed by Klinger |
|---|---|---|---|
| KLINGERSIL C-4430 | Synthetic fibres, NBR | White or green | Outstanding stress relaxation; hot water and higher-temperature steam |
| KLINGERSIL C-4324 | Synthetic high-performance fibres, NBR | Black or green | General-purpose sheet for liquids and steam at lower pressure and temperature |
| KLINGERSIL C-4300 | Aramid fibres, NBR | Olive green | Hot water, steam, oils and hydrocarbons |
| KLINGERSIL C-4500 | Carbon fibres, heat-resistant additives, NBR | Black | Alkaline media and superheated steam; chemical industry |
Documents, ordering details and quotation
When you send an enquiry, give the medium and concentration, operating and test pressure, operating temperature, flange standard, facing and bolt data, the thickness you need and whether you want a full sheet or cut gaskets. The datasheet is the basis for selection, but Klinger notes that its values are typical and that installation conditions vary, so confirm the grade with your own engineering or with Klinger before ordering for a critical service. Browse our wider range of gaskets, seals and pipe fittings for related items.
Datasheets & Documents
- Datasheet KLINGER KLINGERSIL C-4400 datasheet, December 2024 Download
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About brand
Klinger is an Austrian manufacturer of gaskets and industrial sealing materials, with a company history that goes back to 1886 and a head office in Gumpoldskirchen. Seven Star LLC supplies Klinger gasket sheets to plant, maintenance and fabrication teams in Oman and the GCC on inquiry.
Fibre, graphite and PTFE gasket sheets
The Klinger sheets listed here include the aramid fibre KLINGERSIL grades, graphite based top-graph material and the PTFE sheets of the top-chem family. Each official datasheet gives the thickness range, pressure and temperature limits, gasket factors, chemical resistance and the approvals printed by the manufacturer.
Seven Star LLC links the manufacturer document on every product page, so buyers can verify the figures and approvals themselves before they send an inquiry.
Choosing the right sheet
The correct grade depends on the medium, temperature, pressure, flange design and bolt load. Send these details with your request for quotation and we compare them with the published Klinger data before we quote, so the sheet and thickness suit the joint. Sheets can be quoted as whole sheets or as gaskets cut to size.
Related products
Frequently Asked Questions
What is KLINGERSIL C-4400 made of?
Aramid fibres bonded with NBR, according to the Klinger datasheet. The sheet is green.
Which sheet sizes and thicknesses are listed?
1000 x 1500 mm and 2000 x 1500 mm sheets in 0.5, 1.0, 1.5, 2.0 and 3.0 mm thickness, with length and width tolerance of plus or minus 50 mm.
What ASME gasket factors does Klinger print?
For a 2.0 mm gasket at tightness class 0.1 mg/(s x m): y = 15 MPa and m = 1.6.
Which approvals appear on the datasheet?
Oxygen-tested, DIN-DVGW, DVGW H2-ready (ZP 5123), DIN 16421 (W 270), DIN 30653 (VP 401), KTW-BWGL, OVGW G 1.912, TA-Luft, DNV, SVGW and Fire-Safe to DIN EN ISO 10497.
Is C-4400 suitable for aromatics or ketones?
No. The chemical resistance chart in the datasheet rates aromates, chlorinated hydrocarbons, ketone and ester as C, strong attack. Check any other medium with Klinger.
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