Is the TW cover gasket DIN 28450, NBR, type TWF suitable for 4" tank truck connections using TWO O-ring gaskets across -20Â°C to +70Â°C?

Yes. TW cover gasket DIN 28450, NBR, type TWF is suitable for 4" tank truck connections using TWO O-ring gaskets across the â20Â°C to +70Â°C range. Nitrile (NBR/Perbunan) provides good resistance to fuels, oils and many hydraulic fluids typical in tank truck service and maintains sealing properties across the stated temperature window. Ensure the O-rings are installed per the TWF design and inspected for wear, chemical compatibility with the specific cargo, and correct groove dimensions; replace if hardened, cracked or swollen. If the cargo includes aggressive solvents, aromatics, or high concentrations of ketones/esters, verify chemical compatibility with NBR or consider alternative elastomers.

Can TW cover gasket DIN 28450, NBR, type TWF withstand chemical exposure commonly encountered in tank truck 4" connections using TWO O-rings?

Yes. TW cover gasket DIN 28450, NBR, type TWF (using TWO O-rings) is suitable for typical chemical exposures in tank truck 4" connections when fluids are compatible with nitrile (NBR/Perbunan). NBR resists hydrocarbons, fuels, oils and many greases common in tank transport but has limited resistance to strong acids, ketones (e.g., acetone), some esters, chlorinated hydrocarbons and aromatic solvents. Operable temperature range â â20Â°C to +70Â°C; outside this range NBR performance and sealing reliability may degrade. For aggressive chemicals or temperatures near limits, validate compatibility with the specific product and consider alternative elastomers (e.g., FKM/EPDM) or testing before use.

Does TW cover gasket DIN 28450, NBR, type TWF require special torque settings for 4" tank truck connections with TWO O-rings?

TW cover gasket DIN 28450, NBR, type TWF Format (for 4" connection, use O-ring gasket type TWO) does not inherently require special torque settings beyond standard practice for tank truck camlock/flange connections. Key points: - Material and design: NBR (Perbunan) O-rings for type TWF are common elastomer gaskets; they compress to form a seal and tolerate approx. -20Â°C to +70Â°C. - Torque guidance: Use manufacturer-recommended torque for the specific coupling or flange hardware. If no specific value is provided, tighten evenly to achieve firm compression of both O-rings without over-compressing (avoid flattening or extruding the NBR). - Practical approach: Cross-tighten bolts or clamps incrementally in stages to ensure even compression. For bolted flanges, typical medium-range torque values for 4" stainless steel tank fittings are a general reference, but must be confirmed by the fitting or vehicle manufacturer. - Inspection: After initial tightening, pressure-test and re-check torque after first service or thermal cycling. Replace O-rings showing cuts, extrusion, or permanent deformation. - Safety note: Over-torquing can damage O-rings and cause leaks; under-torquing can fail to seal. Always follow coupling/flange manufacturer specs when available. Conclusion: No unique special torque setting is specified solely because the gasket is TW cover gasket DIN 28450, NBR, type TWF Format; follow the coupling/flange manufacturer's torque recommendations and use careful, even, staged tightening to properly compress the TWO O-rings.

TW cover gasket DIN 28450, NBR, type TWF

Additional information

Maximum operating temperature [°C]	70
Minimum operating temperature [°C]	-20

Cover gasket MB (for tank truck connections) type TWF (for 4″ connection, use O-ring gasket type TWO). Material: nitrile (NBR, Perbunan). Temperature range (approximate): from -20°C to +70°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
TW-TWF-050-NBR	TWF gasket 2" 50 mm, NBR	-	-	In stock	0 zł		Enquiry
TW-TWF-080-NBR	TWF gasket 3" 80 mm, NBR	-	-	In stock	0 zł		Enquiry

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Cover gasket MB (for tank truck connections) type TWF (for 4″ connection, use O-ring gasket type TWO). Material: nitrile (NBR, Perbunan). Temperature range (approximate): from -20°C to +70°C.