Klinger KLINGERSIL C-4430 Gasket Sheet

Name: Klinger KLINGERSIL C-4430 Gasket Sheet – Datasheet & Quote
Brand: Klinger
SKU: C-4430

Synthetic-fibre sheet built for hot water and steam duty

KLINGERSIL C-4430 is the Klinger fibre sheet chosen when stress retention at temperature matters. It pairs synthetic fibres, described on the product page as a synthetic and glass fibre combination, with an NBR binder, and Klinger summarises it as having outstanding stress relaxation and resistance to hot water and steam.

Besides water and higher-temperature steam, the datasheet lists oils, gases, salt solutions, fuels, alcohols, moderate organic and inorganic acids, hydrocarbons, lubricants and refrigerants. The stated benefits are suitability for high-temperature steam and water, better resistance against hydrocarbons and a broad media range, in a dimensionally stable sheet.

Technical specifications

Parameter	Specification
Manufacturer / model	Klinger (Rich. Klinger Dichtungstechnik), KLINGERSIL C-4430
Basis composition	Optimum combination of synthetic fibres bonded with NBR (Klinger names synthetic and glass fibres on the product page)
Colour	White or 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, WRAS approval, TA-Luft (Clean air), DNV approval, SVGW approval, Fire-Safe acc. to DIN EN ISO 10497 and ISO 19921
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)	9 %
Recovery, ASTM F 36 J	55 %
Stress relaxation, DIN 52913, 50 MPa, 16 h	39 MPa at 175 °C; 35 MPa at 300 °C
Stress relaxation, BS 7531, 40 MPa, 16 h at 300 °C	31 MPa
Klinger cold/hot compression, 50 MPa, thickness decrease	8 % at 23 °C; 11 % at 300 °C
Tightness, DIN 28090-2	0.05 mg/(s x m)
Specific leak rate, VDI 2440	2.13E-05 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	1.8 g/cm3
Thermal conductivity	0.38 W/mK
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.

What separates C-4430 from the other KLINGERSIL grades

The figures explain the positioning. In the DIN 52913 test the sheet still holds 35 MPa after 16 hours at 300 °C, against 25 MPa for C-4400 and 20 MPa for C-4324, and its hot compression at 300 °C is 11 %, about half of the 20 to 25 % printed for those two sheets. That means less bolt load is lost as the joint heats and cools, which matters on steam lines and boiler-feed pipework.

Two approval entries stand out: WRAS approval for water contact, and Fire-Safe listings to both DIN EN ISO 10497 and ISO 19921. The y factor of 20 MPa is higher than for C-4400, so allow for the bolt load needed to seat the sheet.

Related KLINGER gasket sheets

For comparison, the neighbouring grades in Klinger’s fibre range are shown here.

Model	Basis	Colour	Positioning printed by Klinger
KLINGERSIL C-4400	Aramid fibres, NBR	Green	Universal grade; very good resistance to refrigerants
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
KLINGER Quantum	Fibre and filler compound, HNBR	White	Flexibility at high temperature; FDA conformity

Documents, ordering details and quotation

Please check the steam pressure class and the WRAS or DVGW requirement of the project before choosing the thickness. 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