Klinger KLINGERSIL C-4500 Gasket Sheet

Name: Klinger KLINGERSIL C-4500 Gasket Sheet – Datasheet & Quote
Brand: Klinger
SKU: C-4500

Carbon-fibre sheet for alkaline media and superheated steam

KLINGERSIL C-4500 is described by Klinger as a premium-quality high-pressure gasket designed for the chemical industry. Carbon fibres and special heat-resistant additives are bonded with NBR to give a black sheet that suits high-temperature alkaline media and superheated steam.

Beyond those duties the datasheet lists oils, gases, salt solutions, fuels, alcohols, organic and inorganic acids, hydrocarbons, lubricants and refrigerants. Key features are the use of carbon fibres, heat-resistant additives, resistance to creep and cold flow and dimensional stability; the benefits stated are suitability for high-temperature alkaline media and for superheated steam.

Technical specifications

Parameter	Specification
Manufacturer / model	Klinger (Rich. Klinger Dichtungstechnik), KLINGERSIL C-4500
Basis composition	Carbon fibres and special heat-resistant additives bonded with NBR
Colour	Black
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, DIN 16421 (W 270), OVGW Reg. No. G 2.143, TA-Luft (Clean air), DNV 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	60 %
Stress relaxation, DIN 52913, 50 MPa, 16 h	38 MPa at 175 °C; 30 MPa at 300 °C
Stress relaxation, BS 7531, 40 MPa, 16 h at 300 °C	30 MPa
Klinger cold/hot compression, 50 MPa, thickness decrease	10 % at 23 °C; 15 % at 300 °C
Tightness, DIN 28090-2	0.05 mg/(s x m)
Specific leak rate, VDI 2440	4.94E-06 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	0.43 W/mK (average surface resistance 8.0x10E04 ohm)
Classification, BS 7531:2006	Grade AX
ASME code sealing factors, 2.0 mm, tightness class 0.1 mg/(s x m)	y 20 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.

Where C-4500 earns its place

The numbers show a sheet kept for hard service: residual stress of 30 MPa after 16 hours at 300 °C (DIN 52913), a 15 % thickness loss at 300 °C under 50 MPa and a recovery of 60 %. For stress retention at 300 °C the closest sheets in the datasheets are C-4430 (35 MPa) and Quantum (30 MPa).

Note that the datasheet gives an average surface resistance of 8.0x10E04 ohm, so the sheet is conductive and should not be specified where the joint has to insulate. Approvals printed are oxygen-tested, DIN-DVGW, DIN 16421 (W 270), OVGW G 2.143, TA-Luft, DNV and Fire-Safe to DIN EN ISO 10497. The ASME factors are y 20 MPa and m 1.6.

Related KLINGER gasket sheets

Other Klinger sheets for demanding steam and chemical service are compared 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-4400	Aramid fibres, NBR	Green	Universal grade; very good resistance to refrigerants
KLINGER top-graph 2000	Graphite and synthetic fibres, NBR	Black	Graphite filler, high load-bearing capacity, steam
KLINGER Quantum	Fibre and filler compound, HNBR	White	Flexibility at high temperature; FDA conformity

Documents, ordering details and quotation

State the alkali concentration and steam temperature so the choice can be reviewed with the datasheet. Send the fluid, its concentration, the design and hydrotest pressures, the temperature range, the flange class and face finish and the bolt material, together with the thickness and format (sheet or cut ring) you need. The datasheet values are typical figures from Klinger, not guarantees for a particular joint, so check the grade against the real service before it is specified. Related items are listed under gaskets, seals and pipe fittings.

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.

Frequently Asked Questions